| | | | |
| | | | |
| AACH | Zakłady Azotowe Chorzów S.A. | PL | Revoked | azoty-adipol.pl |
| AAE | AAE GmbH | DE | In use | aae.ch |
| AAEC | VTG Schweiz GmbH | CH | In use | aae.ch |
| AAFM | Asociación de Amigos del Ferrocarril de Madrid | ES | In use | aafmadrid.es |
| AAPSL | Amicale des Agents de Paris St Lazare | FR | In use | |
| AB | Appenzeller Bahnen | CH | In use | appenzellerbahnen.ch |
| ABB | Hitachi Energy Sweden AB | SE | In use | hitachienergy.com |
| ABCAR | AB Prijevoz d.o.o. | HR | In use | |
| ABE | Ankum-Bersenbrücker Eisenbahn GmbH | DE | In use | abe-gmbh.net |
| ABEG | Anhaltinisch-Brandenburgische Eisenbahngesellschaft mbH | DE | In use | abeg-bahn.de |
| ABFC | Autorails de Bourgogne Franche-Comtè | FR | In use | x4039.free.fr |
| ABG | Anhaltische Bahngesellschaft | DE | In use | abg.dwe-web.info |
| ABI | Eurasia Int Trade | DE | In use | |
| ABLOG | AB Prevoz d.o.o. | RS | In use | |
| ABR | Abellio Rail GmbH | DE | Revoked | abeliio.de |
| ABRBW | SWEG Bahn Stuttgart GmbH | DE | Revoked | |
| ABRM | Abello Rail Mitteldeutschland GmbH | DE | In use | abellio.de |
| ABRN | Abellio Rail NRW GmbH | DE | In use | abellio.de |
| ABRRS | Road & Rail Service | DE | In use | road-rail-service.com |
| ABRS | Abellio Rail Baden-Württemberg GmbH | DE | Revoked | abellio.de |
| ABT | AB Tankvagnar | SE | In use | tankvagnar.se |
| ABTR | AB Transitio | SE | In use | transitio.se |
| ABVT | AB Vagon Trans s.r.o. | CZ | In use | |
| ACCIO | Acciona Infraestructuras | ES | In use | acciona.es |
| ACH | AlzChem Trostberg GmbH | DE | In use | alzchem.com |
| ACISA | Agrupación Cántabra de Construcción e Ingeniería (ACCISA) | ES | In use | |
| ACPR | Amicale des Cheminots pour Préservation de la 141 R 1126 | FR | In use | trainvapeur-toulouse.com |
| ACTS | ACTS Abroll-Container-Transport System AG | CH | Revoked | actsag.ch |
| ACTS | ACTS Nederland B.V. | NL | Revoked | acts-nl.com |
| ACTSB | ACTS Abroll-Container-Transport-Service AG | CH | In use | actsag.ch |
| ACTSL | ACTS Luxembourg | LU | In use | |
| AD | Freunde des Schienenverkehrs Flensburg e.V | DE | In use | angelner-dampfeisenbahn.de |
| ADAM | Uwe Adam Transport | DE | In use | uwe-adam-transporte.de |
| ADE | A.D.E. Eisenbahnverkehrsunternehmen GmbH | DE | In use | |
| ADEGS | Ade Gas Oil Company SRL | RO | In use | adegas.ro |
| ADEPF | AUXILIAR DE PATRIMONIO FERROVIARIO | ES | In use | adepf.es |
| ADFER | ADRIAFER S.R.L. | IT | In use | adriader.com |
| ADGM | AD Gleisbau Mittelrhein GmbH | DE | In use | |
| ADHD | L'AUTORAIL X2800 DU HAUT-DOUBS (X2800HD) | FR | In use | x2800-hd.com |
| ADIF | ADIF ( Administrador de Infraestructuras Ferroviarias) | ES | In use | adif.es |
| ADKRS | ADK Rail service, s.r o. | CZ | In use | |
| ADMKR | Silo P Kruse Betriebs GmbH | DE | In use | |
| ADOCI | ADOÇIM ÇIMENTO BETON SAN VE TIC. A.Ş. | TR | In use | adocim.com |
| ADOSI | Advalue Dos Iberica S.L. | ES | In use | advalue2iberica.es |
| ADPF | ADP- Fertilizantes, S.A. | PT | In use | adp-fertilizantes.pt |
| ADRIA | ADRIA RAIL DOO | HR | In use | adria-rail.hr |
| ADSP | Autorita' di Sistema Portuale del Mar Ligure Orientale | IT | In use | adspmarligureorientale.it |
| ADT | Adria Transport D.O.O. | SI | In use | adria-transport.com |
| AED | Alpine-Energie Deutschland GmbH | DE | In use | alpine-energie.de |
| AERS | AERS Rail Services Deutchland GmbH | DE | In use | aers-rail-services.de |
| AEV | Achertaeler Eisenbahn Verein e.V | DE | In use | |
| AF | Albert Fischer GmbH | DE | In use | albert-fischer.de |
| AFFR | Arlington Fleet France | FR | In use | |
| AFG | Andreas Forster, Dienstleistungen Schienenverkehr | DE | In use | |
| AFL | AFL-Bahndienste GmbH | DE | In use | afl-bahndienste.de |
| AGA | AGA Gas AB | SE | Revoked | |
| AGC | AGC Flat Glass Czech a.s., člen AGC Group | CZ | In use | |
| AGE | Arbeitsgemeinschaft Geesthachter Eisenbahn e.V | DE | In use | eisenbahn.geesthacht.de |
| AGIE | agilis Eisenbahngesellschaft mbH & Co. KG | DE | In use | agilis.de |
| AGIL | agilis Verkehrsgesellschaft mbH & Co. KG | DE | In use | agilis.de |
| AGIT | AGIT d.o.o. | HR | In use | agit.hr |
| AGJ | Anten-Gräfsnäs Järnväg | SE | In use | agj.net |
| AGL | Ardagh Glass Limmared AB | SE | In use | ardaghglass.com |
| AGPI | AGPI, a.s. | CZ | In use | |
| AGPJC | Agropodnik a.s. Jičín | CZ | In use | |
| AGPJI | AGROPODNIK, akciová společnost, Jihlava | CZ | In use | |
| AGRAD | AGRO Radomyšl a.s. | CZ | In use | |
| AGRCS | AGRO CS a.s. | CZ | In use | agrocs.cz |
| AGRN | AGRANA ROMANIA | RO | In use | |
| AGROZ | Agro Žamberk a.s. | CZ | In use | |
| AGT | Allgemeine Gleis- und Tiefbau- Bauunternehmung GmbH | DE | In use | agt-mainz.de |
| AGTDU | ALTUN GLEIS UND TIEFBAU GMBH | DE | In use | agtgmbh.de |
| AGUAD | TRANSPORTES Y GRUAS AGUADO S.L. | ES | In use | gruasaguado.com |
| AGUPW | AGU Przedsiębiorstwo Wielobranżowe Szczepan Kuśmierek | PL | In use | |
| AH | ATLAS Hannover Baumaschinen GmbH & Co. | DE | In use | atlas-hannover.de |
| AHD | Rail system s.r.o | CZ | In use | |
| AHG | AHG Handel & Logistik GmbH | DE | In use | ahg-gruppe.de |
| AHM | A.H. Meyer & Cie AG | CH | In use | ahmeyer.ch |
| AHYRE | ANDALUZA DE HIERROS Y RECUPERACIONES S.A. | ES | In use | ahyresa.es |
| AINO | ARGE Istandhaltung Niederösterreich | AT | In use | |
| AIROL | Filippi SA | CH | In use | |
| AIRRA | AIR-RAIL.S.L | ES | In use | air-rail.org |
| AIUK | Aggregate Industries | UK | In use | aggregate.com |
| AIX | AIXrail GmbH | DE | In use | aixrail.de |
| AJ | Association de Jeunes pour l'Entretien et la Conservation des Trains d'Autrefois | FR | In use | ajecta.org |
| AJF | Arvidsjaurs Järnvägsförening | SE | In use | |
| AK | Adria kombi d.o.o., Ljubljana | SI | In use | adriakombi.si |
| AKE | AKE-Eisenbahntouristik – jörg Petry e.K. | DE | In use | ake-eisenbahntouristik.de |
| AKIEM | AKIEM SAS | FR | In use | |
| AKN | AKN Eisenbahn GmbH | DE | In use | akn.de |
| AKO | Arbeitskreis Ostertalbahn (AkO) e.V | DE | In use | ostertalbahn.de |
| AKP | Akwawit-Polmos S.A. | PL | In use | akwawit.com.pl |
| AKRES | Akiem Réseau SAS | FR | In use | akiem.com |
| AL | ALS s. c. Andrzej Bochniarz, Łukasz Bochniarz | PL | In use | |
| ALAND | ARBOTEC GmbH | DE | In use | arbotec-landschaftspflege.de |
| ALBA | ALBATROS klub | SK | In use | albatrosklub.sk |
| ALBE | ALBEMARLE EUROPE SPRL | BE | In use | albemarle.com |
| ALBO | Alberdingk Boley GmbH | DE | In use | |
| ALBRA | ALBRAIL shpk | AL | In use | albrail.al |
| ALCA | Autorail Lorraine Champagne-Ardenne | FR | In use | autorail.lorraineschampagneardenne.facebook.com |
| ALCAN | Rio Tinto Alcan | UK | In use | riotinto.com |
| ALCO | Alcosuisse AG | CH | In use | eav.admin.ch/alcosuisse/?lang=en |
| ALD | AIR LIQUIDE Deutchland GmbH | DE | In use | airliquide.de |
| ALG | Autolink Group AS | NO | In use | autolink.as |
| ALGEP | ALGEPOSA INTERMODAL, S.A. | ES | In use | railsider.com |
| ALHB | ALSTOM Transport Deutschland GmbH | DE | In use | alstom.com |
| ALLIC | Air Liquide CO2 Europe GmbH | DE | In use | airliquide.com |
| ALLIM | Autorail Limousin | FR | In use | autorail-limousin.fr |
| ALLSK | ALLEGRIA.SK, s.r.o. | SK | In use | |
| ALPHA | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com |
| ALPIN | Alpine Bau GmbH | AT | In use | alpine.at |
| ALRO | ALRO S.A. | RO | In use | |
| ALS | ALSTOM Lokomotiven Service GmbH | DE | In use | alstom.de |
| ALSA | ALSA RAIL | ES | In use | alsa.es |
| ALSK | ALPINESLOVAKIA, s.r.o. | SK | In use | alpineslovakia.sk |
| ALSRO | ALSTOM TRANSPORT SA | RO | In use | alstom.com |
| ALST | ALSTOM TRANSPORT Saint Ouen | FR | In use | alstom.com |
| ALSTB | Alstom Transport SA Belfort | FR | In use | alstom.com |
| ALSTR | Alstom Transport Reichshoffen | FR | In use | alstom.com |
| ALTA | Roider GmbH | DE | In use | |
| ALTAB | Alstom Transport AB | SE | In use | alstom.com/se/alstom-sverige |
| ALTR | Alstom Traction BV | NL | In use | aIstom.com |
| ALTRA | “ALTRANS” Koczerski I., Kobierecki Z., Miloch A., Sarzyński P. sp. j. | PL | In use | altrans.wroc.pl |
| ALU | ALUSTA S.A. | PL | In use | alusta.pl |
| ALWSA | “ALVENTA” Spółka Akcyjna | PL | In use | alwernia.com.pl |
| ALZ | Alza Cargo sp. z o.o. | PL | In use | alzacargo.pl |
| AM | Andreas Mühlbauer Bau GmbH | DE | In use | muehlbauer-bau.de |
| AMA | ALKIMAQ ALBARDIA S.L. | ES | In use | |
| AMBR | Ambrogio Trasporti S.p.A. | IT | In use | ambrogio.it |
| AMBRO | AMBRO S.A | RO | In use | ambro.ro |
| AMG | ARCELOR MITTAL GALATI S.A. | RO | In use | arcelormittal.com |
| AMH | ARCELOR MITTAL HUNEDOARA SA | RO | In use | arcelormittal.com |
| AMIXO | Amixo AB | SE | In use | amixo.se |
| AML | Adam & MaLoWa Lokvermietung GmbH | DE | In use | lok-vermietung.de |
| AMO | ArcelorMittal Ostrava a.s. | CZ | In use | arcelormittal.com |
| AMORT | ATLAS Mortag Baumaschinen & Fahrzeugtechnik e.K. | DE | In use | mortag-atlas.de |
| AMP | AMP Bahnlogistik | DE | In use | amp-bahnlogistik.de |
| AMPR | Amprion GmbH | DE | In use | amprion.net |
| AMR | Altmark-Rail GmbH | DE | In use | altmark-rail.com |
| AMT | Peter Bosáček - AM Tuning | SK | In use | |
| AMTGC | AMT GENOVA SPA - FERROVIA GENOVA CASELLA | IT | In use | amt.genova.it |
| AMTNL | AMT RailRoad BV | NL | In use | amtgroup.nl |
| AMTPI | ARCELOR MITTAL TUBULAR PRODUCTS SA | RO | In use | arcelormittal.com |
| AMTPR | ARCELOR MITTAL TUBULAR PRODUCTS ROMAN SA | RO | In use | faur.ro |
| AMUR | AMURCO SRL | RO | In use | |
| AN | Arriva Nederland | NL | In use | arriva.nl |
| ANAT | ANAT-Musée du tram | CH | In use | museedutram.ch |
| ANATE | ANATEMA, s. r. o. | SK | In use | |
| ANCOM | Mer Mec S.p.A. | IT | In use | mermecgroup.com |
| ANGEL | Angel Trains Limited | UK | In use | angeltrains.co.uk |
| ANMSG | ATLAS NORDHESSEN bopp fahrzeug-und baumaschinentechnik GmbH & Co. KG | DE | In use | atlas-nordhessen.de |
| ANPT | ANAPET ULUSLARARASI NAK. PET. INŞAAT SAN. ve TİC. A.Ş. | TR | In use | anapet.net |
| ANS | ANSETT LOGISTICS S.R.L. | RO | In use | ansett-logistics.ro |
| ANT | MSB Akaryakit Ikmal ve NATO POL Tesisleri Işletme Başkanliği | TR | In use | ant.gov.tr |
| ANVL | Vladimír Anton | CZ | In use | antonvladimir.cz |
| AP | Amoníacos de Portugal, SA | PT | Revoked | |
| APCC | Association pour la Préservation de la CC 6570 | FR | In use | cc6570.fr |
| APDMH | AP2800 | FR | In use | ap2800.nuxie.net |
| APH | Agropolychim / Агрополихим | BG | In use | agropolychim.bg |
| APL | Arriva Polska sp. z o.o. | PL | In use | arriva.pl |
| APMFS | APMFS (Association pour la Préservation du Matériel Ferroviaire Savoyard) | FR | In use | apmfs.fr |
| APORR | ПОРР България ЕООД | BG | In use | porr.at |
| APPFI | Fundació per la Preservació del Patrimoni Ferroviari i Industrial | ES | In use | appfi.net |
| APPMF | Association pour la Préservation du Patrimoine et des Matériel Ferroviaires | FR | In use | appmf.fr |
| APRO | CCI APROPORT | FR | In use | aproport.com |
| AQR | Aquitaine Rail | FR | In use | groupe-cassous.com |
| AR | Anglia Railways Train Services | UK | Blocked | angliarailways.co.uk |
| ARAGB | ARAG Bau AG | CH | In use | arag-bau.ch |
| ARAIL | Aarsleff Rail A/S | DK | In use | aarsleff.com |
| ARBGI | Arbegui s.a. | ES | In use | arbegui.com |
| ARBR | Rail ARB s.r.o | SK | In use | |
| ARC | Aqaba Railway Corporation | JO | In use | |
| ARCET | Association Rhone-alpine de Conservation d'Engins Thermique | FR | In use | site.asso-arcet.com |
| ARCO | Arco Transportation GmbH | DE | In use | |
| ARETZ | Aretz GmbH & Co. KG | DE | In use | aretzwaggon.de |
| ARFER | Ar.Fer S.r.l. a Socio Unico | IT | In use | |
| ARGE | ARGE 1041.15 | AT | In use | arge1041.at |
| ARGO | ARGO Bohemia s.r.o. | CZ | In use | argogroup.cz |
| ARGU | Argü Rail Transport and Warehousing SA, Istanbul | TR | In use | ar-gu.com.tr |
| ARGUS | ARGUS S.A. | RO | In use | argus-oil.ro |
| ARHRO | ATLAS Rostock GmbH | DE | In use | atlas-rostock.de |
| ARIRO | ASTRA RAIL INDUSTRIES SA | RO | In use | greenbrier-europe.com |
| ARL | AR Logistic Consulting GmbH | DE | In use | |
| ARM | Armenian Railway CJSC | AM | In use | |
| ARMEX | Przedsiębiorstwo Inżynieryjno-Budowlane ARMEX Sp. z o.o | PL | In use | armex.com.pl |
| ARMF | ARMAFER S.r.l. | IT | In use | |
| ARMR | Atlas Rhein main GmbH | DE | In use | atlas-rhein-main.de |
| ARP | ARRIVA RP Sp. z o.o. | PL | In use | arriva.pl |
| ARR | ARRIVA vlaky s.r.o. | CZ | In use | arriva.cz |
| ARS | ARS Altmann AG | DE | In use | ars-altmann.de |
| ARSSA | Acciona Rail Services s.a. | ES | In use | acciona-railservices.es |
| ARST | ARST S.p.A. | IT | In use | arst.sardegna.it |
| ARTE | Arterail | FR | In use | arterail.com |
| ARTIN | ART In Energy sp. z o.o. | PL | In use | artinenergy.pl |
| ARVMS | ARRIVA Mobility Solurions, s.r.o. | SK | In use | arriva.sk |
| ARVSK | Arriva Service s.r.o | SK | In use | |
| ARXA | Arxada AG | CH | In use | arxada.com |
| AS | Alexander Schröter | DE | In use | |
| ASBB | AS BB25500 (Association de Sauvegarde d'une locomotive de type BB 25500) | FR | In use | asbb25500.wixsite.com |
| ASBRE | ASB Recycling | BE | In use | aperam.com |
| ASC | ASICAR SRL | RO | In use | |
| ASCEN | Ascendos Rail Leasing Sarl | LU | Revoked | ascendos.com |
| ASCH | ASCH INFRAESTRUCTURAS Y SERVICIOS SA | ES | In use | aschinfraestructuras.com |
| ASEOL | Shell Aseol AG | CH | In use | |
| ASERD | A.S. - Erbau | DE | In use | as-erdbau.eu |
| ASFER | ASFER LOJISTIK SAN: TIC: LTD ŞTI | TR | In use | asferlojistik.com |
| ASKEO | askeo rail GmbH | DE | In use | askeorail.de |
| ASLAN | Aslan Denizcilik Anonim Sirketi | TR | In use | aslandenizcilik.com.tr |
| ASLVG | A.V.G. Ascherslebener Verkehrsgesellschaft mbH | DE | In use | die-avg.de |
| ASM | Aare Seeland Mobil AG | CH | In use | aare-seeland-mobil.ch |
| ASP | Anschlussbahn-Servicegesellschaft Pressnitztalbahn mbH | DE | In use | pressnitztalbahn.com |
| ASPO | Armádní Servisní, příspěvková organizace | CZ | In use | as-po.cz |
| ASPWR | Aspekt Przedsiębiorstwo Handlowo-Usługowe | PL | In use | |
| ASSIG | ASSIGNIA INFRAESTRUCTURAS, S.A. | ES | In use | assignia.com |
| ASTR | Astra Finance / "Астра финанс" ЕООД | BG | In use | |
| ASTRA | ASTRA VAGOANE ARAD SA | RO | In use | |
| ASWL | Schneider & Schneider GmbH | DE | In use | |
| AT | Arriva Tog A/S | DK | In use | arrivatog.dk |
| ATA | ATA KARBON MADEN NAKLİYAT DEMİRYOLU TAŞIMACILIĞI VE IŞLETMECİLİĞİ BAKIM ONARIM VE LOJİSTİK HİZMETLERİ GIDA İNŞAAT DIŞ TİCARET LİMİTED ŞİRKETİ | TR | In use | atakarbon.com.tr |
| ATAB | A-Train AB | SE | In use | arlandaexpress.com |
| ATAC | ATAC S.p.A. | IT | In use | atac.roma.it |
| ATBE | Alpha Trains Belgium NV | BE | In use | alphatrains.eu |
| ATC | ASTRA TRANS CARPATIC SRL | RO | In use | astratranscarpatic.ro |
| ATCH | ANGEL TRAINS SWITZERLAND | CH | Revoked | angeltrains.com |
| ATDE | Alpha Trains Europa GmbH | DE | In use | alphatrains.eu |
| ATG | DB Cargo Logistics GmbH | DE | In use | dbcargo.com/rail-deutschland-automotive-de/start |
| ATGER | ALSTOM Transportation Germany GmbH | DE | In use | alstom.com |
| ATGRV | ATELIERELE CFR GRIVITA SA | RO | In use | |
| ATHOS | ATHOS RAIL S.A. | ES | In use | athoslogistica.com |
| ATIB | ALPHA TRAINS IBERIA | ES | In use | alphatrains.eu |
| ATIT | Alpha Trains Italia S.r.l. | IT | In use | alphatrains.eu |
| ATL | ATLAS GmbH | DE | In use | atlasgmbh.com |
| ATLAS | ATLAS Leipzig Baupartner GmbH | DE | In use | atlas-leipzig.de |
| ATLD | Alpha Trains Locomotives GmbH | DE | In use | angeltrains.com |
| ATLII | Alpha Trains Luxembourg No. 2 S.à.r.l. | LU | In use | alphatrains.eu |
| ATLU | Alpha Trains Luxembourg s.à.r.l. | LU | In use | alphatrains.eu |
| ATMBG | "ATM BG" d.o.o, Beograd | RS | In use | atmbg.rs |
| ATN | Gentra sp. z o.o. sp. k. | PL | In use | |
| ATPL | Alpha Trains Polska Sp. z o.o. | PL | In use | alphatrains.eu |
| ATPOL | Atlas Poland Sp. z o.o. | PL | In use | atlas-poland.pl |
| ATR | AURATOR sp. z o. o. | PL | In use | aurora.com.pl |
| ATRR | ATIR RAIL | FR | In use | |
| ATRTC | Atritec AB | SE | In use | atritec.se |
| ATS | Auto Transport Service AS | NO | In use | autotransport.no |
| ATSA | ALSTOM TRANSPORTE S.A. (TGS) | ES | In use | alstom.com |
| ATSF | Association des Trains du Sud de la France (ATSF) | FR | In use | atsf.webself.net |
| ATTCV | Association du Train Touristique de Centre Var | FR | In use | attcv.fr |
| ATVA | Amis de la traction à Vapeur en Ardenne | FR | In use | cftsa.fr |
| ATVMO | Amicale des Anciens et Amis de la Traction Vapeur Section Montluçon/Auvergne | FR | In use | aaatvmontlucon.fr |
| ATVMP | Amicale des Anciens et Amis de la Traction Vapeur - Midi Pyrénées | FR | In use | 241P9.fr |
| ATVMU | Association des Anciens et Amis de la Traction Vapeur Mulhouse | FR | In use | |
| ATVSP | Amicale des Anciens et Amis de la Traction Vapeur Saint Pierre des Corps | FR | In use | 231e41.fr |
| ATVVL | Amicale des Anciens et Amis de la Traction Vapeur - Centre Val de Loire | FR | In use | 141r840.com |
| ATW | Arriva Trains Wales / Trenau Arriva Cymru | UK | Blocked | arrivatrainswales.co.uk |
| AUDI | AUDI AG | DE | In use | audi.de |
| AULOC | Augsburger Localbahn GmbH | DE | In use | augsburger-localbahn.de |
| AUR | Aurora Rail Oy | FI | In use | easmar.fi |
| AUSTR | AUSTRO Baumaschinen s.r.o. | CZ | In use | austrobaumaschinen.cz |
| AUTG | AUTOGAS IMPEX SRL | RO | In use | |
| AVA | Aargau Verkehr AG (AVA) | CH | In use | |
| AVC | ASTRA VAGOANE CALATORI SA | RO | In use | transferoviarcalatori.ro |
| AVE | Alta Velocidad de Español | ES | Blocked | |
| AVEXP | Associazione Verbano Express | IT | In use | verbanoexpress.com |
| AVG | Albtal-Verkehrs-Gesellschaft mbH | DE | In use | avg.info |
| AVHCB | ATLAS CB Baumaschinen KG | DE | In use | atlas-cottbus.de |
| AVHHH | Atlas Hamburg GmbH | DE | In use | |
| AVHLB | ATLAS von der Wehl GmbH | DE | In use | |
| AVIS | Aвиc Инженеринг ЕООД | BG | In use | avis-eng.eu |
| AVL | Alexander von Lüpke | DE | In use | |
| AVOLL | Lokvermietung Aggerbahn Andreas Voll e.K. | DE | In use | aggerbahnde |
| AW | Arenaways srl | IT | In use | arenaways.com |
| AWA | GINEUROGRUP 2008 SRL | RO | In use | |
| AWAM | AWAMARF GRUP SRL | RO | In use | |
| AWIM | AWI Maskin AB | SE | In use | awi.se |
| AWKHG | Eigentümergemeinschaft | DE | In use | |
| AWR | AW RAIL S.r.l | IT | In use | awrail.it |
| AWT | PKP CARGO INTERNATIONAL a.s. | CZ | In use | pkpcargointernational.com |
| AWTHU | AWT RAIL HU Ltd | HU | In use | bivzrt.hu |
| AWTR | AWT ROSCO a.s. | CZ | In use | awt.eu |
| AWTSK | AWT Rail SK a.s. | SK | Revoked | |
| AXBSK | AXBENET, s.r.o | SK | In use | |
| AXEL | AXEL-RAIL | PL | In use | axel-rail.pl |
| AXIL | AXIL INGENIERÍA Y SERVICIOS, S.L. | ES | In use | axilingenieria.com/wp/ |
| AXS | Axess Logistics AB | SE | In use | axesslogistics.se |
| AYASA | CONSTRUCCIONES Y OBRAS AYASA, S.L. | ES | In use | construccionesayasa.es |
| AZ | Railways of Azerbaidjan | AZ | In use | |
| AZAFT | Asociación Zaragozana de Amigos del Ferrocarril y Tranvías | ES | In use | azaft.org / trenazul.es |
| AZBAU | Achatz GmbH Bauunteinehmung | DE | In use | achatz-bau.de |
| AZD | AŽD Praha, s.r.o. | CZ | In use | azd.cz |
| AZO | AZOMURES SA | RO | In use | azomures.com |
| AZR | AZURAIL | FR | In use | azurail.fr |
| AZS | RDC Autozug Sylt GmbH | DE | In use | autozug-sylt.de |
| AZVI | AZVI, s.a. | ES | In use | azvi.es |
| AZW | Axel Zwingenberger | DE | In use | |
| B | NMBS/SNCB | BE | In use | b-rail.com |
| BADUC | BADUC S.A. | RO | In use | baduc.ro |
| BAGL | Bucher AG Langenthal | CH | In use | |
| BALZO | Construcciones y Promociones Balzola S.A.U. | ES | In use | balzola.com |
| BAM | BAM Rail | NL | In use | bam.nl |
| BARAK | Barák Milan | CZ | In use | |
| BARD | Bardos a.s. | CZ | In use | |
| BASAB | Baneservice Skandinavia AB | SE | Revoked | baneservice.se |
| BASF | BASF SE | DE | In use | basf.com |
| BAUTE | Bautec GmbH & Co. KG | DE | Revoked | |
| BAX | BAREXIM SRL | RO | In use | tts-group.ro |
| BAYER | Bayer CropScience Deutschland GmbH | DE | In use | |
| BAYIK | BAYIK DEMIR TIC.LTD. ŞTI | TR | In use | |
| BB | Baggerbetrieb Burkhardt GmbH | DE | Revoked | baggerbetrieb-burkhardt.de |
| BBBB | BB Baumachinen Boizenburg GmbH | DE | In use | baumaschinen-boizenburg.de |
| BBBIT | Bittner Bahn.- und Gleisbau GmbH | AT | In use | bbw.at |
| BBFW | Bergische Bahnen / Förderverein Wupperschiene e.V. | DE | In use | wupperschiene.eu |
| BBG | Bahnbetriebsgesellschaft Stauden | DE | In use | staudenbahn.de |
| BBIGB | Peter Gross Rail GmbH & Co. KG | DE | In use | gross-bau.de |
| BBL | BBL Logistik GmbH | DE | In use | bbl-logistik.de |
| BBLC | BBL Consulting GmbH | DE | In use | bbl-logistik.de |
| BBLLG | BBL-Bahnbau Lüneburg GmbH | DE | In use | |
| BBM | BRÜNING-BAUMASCHINEN UG | DE | In use | |
| BBN | Bahnbau Nord GmbH | DE | In use | bahnbaunord.de |
| BBO | Niederösterreichische Bahnnostalgie | AT | In use | nbn-bahn.com |
| BBR | Rail Power Systems GmbH | DE | Revoked | bbrail.com |
| BBRA | Balfour Beatty GmbH | AT | Revoked | bbrail.at |
| BBRB | Implenia Regiobau GmbH (Rechtsnachfolger Bilfinger) | DE | In use | |
| BBRI | BALFOUR BEATTY RAIL IBÉRICA S.A.U. | ES | Revoked | bbrail.com |
| BBRL | Balfour Beatty Rail | UK | In use | bbrail.com |
| BBRSE | Balfour Beatty Rail AB | SE | In use | bbrail.se |
| BBVAG | Boldizsár Béla | SK | In use | |
| BBW | Bahnbau Wels GmbH | AT | In use | bbw.at |
| BBWEI | Bahnbau WEIDLICH GmbH | DE | In use | |
| BBZW | Böhrer Baumaschinen GmbH & Co. KG | DE | In use | boehrer-baumaschinen.de |
| BC | Belarus Railways | BY | In use | rw.by |
| BCA | BCA Entreprenad AB | SE | Revoked | bca.se |
| BCB | Bayerische Cargobahn | DE | In use | bayerischecargobahn.de |
| BCH | BorsodChem MCHZ, s.r.o. | CZ | In use | |
| BCHEM | BorsodChem Zrt. | HU | In use | borsodchem-group.com |
| BCK | BauCharter Baumaschinen Vermietungs GmbH | DE | In use | baucharter.com |
| BCR | Benders Leasing AB | SE | In use | benders.se |
| BDB | Brünig Dampfbahn BDB | CH | In use | bruenig-dampfbahn.ch/ |
| BDG | BDG Bahnservice- und Dienstleistungsgesellschaft mbH & Co. KG | DE | In use | bdg-bahnservice.de |
| BDK | BDK Korkmaz | DE | In use | |
| BDMW | BUDAMAR WEST GmbH | DE | In use | budamar.de |
| BDS | Báňská dopravní spol.s r.o. | CZ | In use | |
| BDVF | BDVF | FR | In use | |
| BDWM | BDWM Transport AG | CH | Revoked | bdwm.ch |
| BDX | BDX Företagen AB | SE | In use | bdx.se |
| BDXRA | BDX Rail AB | SE | In use | bdxrail.se |
| BDZ | Chemin de fer de l'Etat bulgare - Bulgarski Durzhavni Zheleznitsi | BG | In use | bdz.bg |
| BDZPP | БДЖ -Пътнически превози ЕOOД (БДЖПП) | BG | In use | bdz.bg |
| BDZTP | БДЖ - Товарни превози ЕOOД (БДЖTП) | BG | In use | bdz.bg |
| BE | Bentheimer Eisenbahn AG | DE | In use | bentheimer-eisenbahn.de |
| BEBRA | Holzlogisik & Güterbahn Bebra GmbH | DE | In use | hlg-bebra.eu |
| BECK | Josef Beck | DE | In use | |
| BEF | Berliner Eisenbahnfreunde e.V. | DE | In use | berliner-eisenbahnfreunde.de |
| BEG | Brohltal Schmalspureisenbahn Betriebs-GmbH | DE | In use | vulkan-express.de |
| BEI | Ireland Luxury Rail Tours Limited | IE | In use | belmond.com |
| BELL | BELLEZA, s.r.o. | SK | In use | |
| BEM | Bayerisches Eisenbahnmuseum | DE | In use | bayerisches-eisenbahnmuseum.de |
| BENT | Benteler Rothrist AG | CH | In use | benteler.com |
| BENTZ | BE Netz GmbH | DE | In use | be-netz.eu |
| BERGR | Berger Bau SE | DE | In use | bergerholding.eu |
| BERK | Berk Akaryakıt Nakliyat İnşaat İthalat İhracat Pazarlama Sanayi ve Ticaret Limited Şikerti | TR | In use | berknakliyat.com.tr |
| BETZV | BETAMONT, s.r.o. | SK | In use | betamont.sk |
| BEU | SC CONSTANTIN GRUP | RO | In use | locomotive.ro |
| BEV | Rudolf Bräunert | DE | In use | |
| BF | Blankenbach + Fischer GmbH | DE | Revoked | |
| BFE | BIO FUEL ENERGY S.R.L. | RO | In use | |
| BFL | BF Logistics s.r.o. | CZ | In use | bfl.cz |
| BFLSK | Partners 4RAIL, s.r.o. | SK | In use | deutsche-leasing.com/sk |
| BFS | Bürgerverein zur Förderung des Schienenverkers e.V | DE | Revoked | bfs-buergerbahn.de |
| BGG | Billerud AB, Gruvöns Bruk, Grums | SE | In use | billerud.com |
| BGT | BGT Bagger-, Gleis- und Tiefbauarbeiten Rainer Staschok e.K. | DE | In use | |
| BGTG | BGT Staschok GmbH | DE | In use | |
| BGTRV | „ТРАНССТРОЙ ВAРНА” АД | BG | In use | transstroy-varna.bg |
| BGZPT | "ЖП - Тракция" ЕООД | BG | In use | |
| BHAN | Carl Beutlhauser Baumaschinen GmbH (Region Rheinland) | DE | In use | beutlhauser.de |
| BHDD | Carl Beutlhauser Baumaschinen GmbH | DE | In use | beutlhauser.de |
| BHE | Bremische Hafeneisenbahn | DE | In use | bremen.de/wuh/ |
| BHEV | Budapesti Helyi Érdekü Vasút | HU | Revoked | bkv.hu |
| BHL | BEHALA - Berliner Hafen- und Lagerhausgesellschaft mbH | DE | In use | behala.de |
| BID | BID ENGINEERING INFRASTRUCTURE S.R.L. | RO | In use | |
| BIEF | Bielefelder Eisenbahnfreunde e.V. | DE | In use | bielefelder-eisenbahnfreunde.de |
| BIF | Bahn im Film | AT | In use | bahn-im-film.at |
| BIG | B.I.G. | DE | In use | |
| BIGE | BIGE-Holding Kft. | HU | In use | bigeholding.hu/bigeholdingkft |
| BIVB | BIV Bau-u Jndustriegeräte Vertriebs GmbH | DE | In use | bivteam.de |
| BJ | Bergslagernas Järnvägssällskap | SE | In use | bjs-club.se |
| BKD | Borkumer Kleinbahn und Dampfschifffahrt | DE | In use | borkumer-kleinbahn.de |
| BKE | BKE Eisenbahn-Service GmbH | DE | In use | kbe-eisenbahn.de |
| BKG | Bahnservice Kunze GmbH & Co. KG | DE | In use | bkg-bahnservice.de |
| BKMBG | Bareksim EOOD | BG | In use | |
| BKS | BillerudKorsnäs Sweden AB Skärblacka Mill | SE | In use | billerudkorsnas.com |
| BKSKG | BKS Schömig GmbH & Co. KG | DE | In use | bks-schoemig.de |
| BL | BahnLog Bahnlogistik und Service GmbH | DE | In use | bahnlog.com |
| BLAND | Bernhard Landers GmbH | DE | In use | baumundholz.de |
| BLASE | Bläse Kalkbruk Intresseförening | SE | In use | blase.se |
| BLB | Burgenlandbahn AG | DE | In use | burgenlandbahn.de |
| BLC | Bahnlogistik24 GmbH | DE | In use | |
| BLE | Butzbach-Licher Eisenbahnfreunde e.V | DE | In use | butzbach-licher-eisenbahnfreunde.de |
| BLES | BLESS TRANS SERV SRL | RO | In use | |
| BLETR | Region Blekinge | SE | In use | blekingetrafiken.se |
| BLFSK | BAWAG Leasing & Fleet s.r.o. | SK | In use | bawagleasingandfleet.sk |
| BLG | BLG AutoRail GmbH | DE | In use | |
| BLGRT | BLG RailTec GmbH | DE | In use | blg-railtec.de |
| BLHA | BL Handel & Logistik GmbH | DE | In use | |
| BLJ | Blommans Järnvägsservice AB | SE | In use | |
| BLM | Bergbahn Lauterbrunnen - Mürren | CH | In use | jungfraubahnen.ch |
| BLMB | blm Blue lean mobility gmbh | DE | In use | blue-lean-mobility.com |
| BLP | BLP Wiebe Logistik GmbH | DE | In use | wiebe.de |
| BLS | BLS Lötschbergbahn AG | CH | In use | bls.ch |
| BLSC | BLS Cargo AG | CH | In use | bls-cargo.ch |
| BLSFV | BLS Fernverkehr AG | CH | In use | bls.ch |
| BLSK | BUDAMAR LOGISTICS, a.s. | SK | In use | budamar.sk |
| BLSN | BLS NETZ AG | CH | In use | bls.ch |
| BLSR | BL Rail AB | SE | In use | |
| BLSS | BLS-Stiftung | CH | In use | BLS Stiftung - BLS AG |
| BLT | Baselland Transport | CH | In use | blt.ch |
| BLV | Bayerischer Localbahn Verein e.V | DE | In use | localbahnverein.de |
| BLW | Blöß Lokdienste | DE | In use | bloess-lokdienste.de |
| BLX | Lineas Group SA/NV | BE | In use | lineas.net |
| BM | BUD-MOST Jan Boruch | PL | In use | |
| BMB | BM Bahndienste GmbH | DE | In use | bm-bahndienste.de |
| BMC | Martín Bárta | CZ | In use | |
| BMDM | Bulmarket DM / "Булмаркет ДМ" ООД | BG | In use | bulmarket.bg |
| BMEVU | Bolay & Moser EVU GmbH | DE | In use | |
| BMK | Agencja Turystyczno-Usługowa ‘’BAWDIM’’ – Roman Mazur | PL | In use | bieszczady.com.pl |
| BMNPK | BM Naprawa Pojazdów Kolejowych Antoni Bartosz Moch | PL | In use | |
| BMONV | Bundesmonopolverwaltung für Branntwein | DE | In use | |
| BMS | BMS Wolfgang Schlage | DE | Revoked | |
| BMSS | BMS Schlage | DE | In use | |
| BMTI | BMTI ČR s.r.o. | CZ | In use | |
| BMWM | Baumaschinenvermietung und Service Wieland Münchow | DE | In use | |
| BN | Bane NOR SF | NO | In use | banenor.no |
| BNKLR | Benkler AG (Sersa Group) | CH | In use | benkler.ch |
| BNVIT | Bonaventura srl | IT | In use | bonaventura.it |
| BOAG | Borner Transport und Lagerhaus AG | CH | In use | borner-ag.ch |
| BOB | Berner Oberland Bahnen | CH | In use | jungfraubahnen.ch |
| BOBFN | Bodensee-Oberschwaben-Bahn GmbH & Co. KG | DE | In use | bob-fn.de |
| BOBO | BOBO Járműjavító, Ipari, Kereskedelmi és Szolgáltató KFT | HU | In use | bobokft.hu |
| BOBY | Bayerische Oberlandbahn | DE | In use | bayerischeoberlandbahn.de |
| BOEG | Bocholter Eisenbahngesellschaft mbH | DE | In use | bocholter-eisenbahn.de |
| BOELS | Wolfgang Bölstler Baumaschinenverleich | DE | In use | |
| BONAN | BONANDRINI | FR | In use | |
| BONN | BONNES Paweł Kowalczyk | PL | In use | |
| BOPO | Borealis Polyolefine GmbH | AT | In use | borealisgroup.com |
| BORDO | BORDON INVERSIONES 2007, S.L. | ES | In use | alphatrains.eu |
| BORSC | Boryszew S.A. Oddział Boryszew ERG w Sochaczewie | PL | In use | boryszewerg.com.pl |
| BOSJ | Föreningen Böda Skogsjärnväg | SE | In use | bosj.se |
| BOXX | BoxXpress.de GmbH | DE | In use | boxxpress.de |
| BP | Igor Brik | CZ | In use | |
| BPA | Bahnpark Augsburg gGmbH | DE | In use | bahnpark-augsburg.eu |
| BPPAS | BP Petrolleri A.Ş. | TR | In use | bp.com |
| BPR | BENet Praha spol. S.r.o. | CZ | In use | |
| BPRM | Baltic Port Rail Mukran GmbH | DE | In use | |
| BPSP | BPS-Prastav, s.r.o. | CZ | In use | bps-prastav.cz |
| BPT | BPT LEASING, a.s. | SK | In use | bptleasing.sk |
| BR | Bayernhafen Gruppe | DE | In use | bayernhafen.de |
| BRA | BRISE AGRICULTURA SA | RO | In use | |
| BRACH | Reiner Brach GmbH&Co. KG | DE | In use | brach.de |
| BRAG | BauRail AG | CH | In use | mueller-frauenfeld.ch |
| BRAUN | Emeran Braun Bahnbau und Maschinen GmbH | DE | In use | |
| BRB | Bayerische Regiobahn GmbH | DE | In use | |
| BRBCH | Brienz Rothorn Bahn AG | CH | In use | brienz-rothorn-bahn.ch |
| BRC | Rail Center Bützow GmbH | DE | Revoked | railcenter.de |
| BRCZ | BRYNTIN RAIL CZ s.r.o. | CZ | In use | |
| BREL | Brikel EAD / Брикел ЕАД | BG | In use | |
| BRETT | Brett Aggregates Ltd | UK | In use | brett.co.uk |
| BRFS | Beacon Rail Finance Sàrl | LU | In use | beaconrail.com |
| BRIE | Werner Briesemeister GmbH & Co. KG | DE | In use | |
| BRKS | Bratislavská Regionálna Kolajová Spolocnost | SK | In use | brks.sk |
| BRLL | Beacon Rail Leasing Limited | UK | In use | beaconrail.com |
| BRM | BRM Investment AG | CH | In use | m-rail.ch |
| BRO | Brouwer Technology B.V. | NL | In use | brouwertechnoloqy.com |
| BRS | STRABAG BMTI Rail Service GmbH | DE | In use | strabag.de |
| BRSPL | B.R.S. sp. z o.o. | PL | In use | |
| BRT | Barter S.A. | PL | In use | bartergaz.pl |
| BRTG | Brenntag CEE GmbH | AT | In use | brenntag-cee.com |
| BRX | Bartex sp. z o.o. | PL | In use | bartex-paliwa.pl |
| BS | Baneservice AS | NO | In use | baneservice.no |
| BSAG | Bremer Straßenbahn SG | DE | In use | cityairporttrain.com |
| BSAS | BSAS EisenbahnVerkehrsGmbH & Co.KG | DE | In use | bsas-evg.de |
| BSB | SWEG Südwestdeutsche Landesverkehrs-AG | DE | Revoked | sweg.de |
| BSBB | Bahnservice BB GmbH | DE | In use | bahnbb.de |
| BSBS | BSBS Braunschweiger Bahn Service GmbH | DE | In use | N |
| BSBZW | BSB-Saugbagger und Zweiwegetechnik GmbH&Co. KG | DE | In use | saugbagger-betriebe.de |
| BSF | BSJG Holding AB | SE | In use | bsverkstader.se |
| BSH | Brenntag Schweizerhall AG | CH | In use | |
| BSK | Bałtycki Serwis Kolejowy sp. z o.o. | PL | In use | bsk.szczecin.pl |
| BSL | B-S-L GmbH | DE | In use | betrieb-service-logistik.de |
| BSM | Bahnen der Stadt Monheim GmbH | DE | In use | bahnen-monheim.de |
| BSS | BSS 2000 Kft. | HU | In use | bss2000.hu |
| BSSG | BSS Bahnservice Saarland GmbH | DE | In use | bs-saarland.de |
| BSU | BSU - Ulm UG | DE | In use | |
| BSV | Bahnservice Vogtland | DE | In use | |
| BSW | Badische Stahlwerke GmbH | DE | In use | bsw-kehl.de |
| BT | Bombardier Transportation Sweden AB | SE | In use | bombardier.se |
| BTAS | Bohumin terminal, a.s. | CZ | In use | bohuminterminal.cz |
| BTCH | Bombardier Transportation (Switzerland) SA | CH | In use | bombardier.com |
| BTE | Bremen-Thedinghausener Eisenbahn GmbH | DE | In use | |
| BTEX | BTE BahnTouristikExpress GmbH | DE | In use | |
| BTF | Bombardier Transport France | FR | In use | |
| BTFAB | Berg & Tunnel Förstärkning Sweden AB | SE | In use | |
| BTG | BTG GmbH | DE | In use | btgbau.de |
| BTH | ALSTOM Transportation Germany GmbH | DE | In use | alstom.com |
| BTITA | Bombardier Transportation Italy S.p.A. Unipersonale | IT | In use | bombardier.com |
| BTJB | Blå Tåget Jernbanor AB | SE | In use | blataget.com |
| BTK | Bombardier Transportion GmbH | DE | In use | |
| BTMH | Betriebe der Stadt Mülheim an der Ruhr | DE | In use | btmh.de |
| BTS | BULK TRANSSHIPMENT SLOVAKIA, a.s. | SK | In use | |
| BTSK | DB Cargo AG | DE | In use | |
| BTT | BTTrains | NL | In use | bttrains.nl |
| BTUBA | Baresel Tunnelbau GmbH | DE | In use | baresel.de |
| BTV | BTV Bahn-Tiefbau Ventschow GmbH | DE | In use | |
| BTW | Bahn Technik Wrocław sp. z o.o. | PL | In use | btw.wroc.pl |
| BUB | Brenner & Brenner Dampflokomotiven Betriebsgesellschaft mbH | AT | In use | bb-bluetrain.at |
| BUG | BUG Vermietungsgesellschaft mbH | DE | In use | bug-ag.de |
| BUGAG | BUG Verkehrsbau AG | DE | Revoked | bug-ag.de |
| BUGW | BUG Verkehrsbau GmbH | DE | Revoked | bug-ag.de |
| BUK | Bbdorf & Kerstan GmbH | DE | In use | |
| BULRO | Бул-Ро ЕООД / Bul-Ro EOOD | BG | In use | |
| BUM | BuM Beton- und Monierbau GmbH | DE | In use | bumherne.net |
| BUNGE | BUNGE ROMANIA SRL | RO | In use | |
| BUNTE | Johann Bunte Bauunternehmung GmbH & Co. KG | DE | In use | johann-bunte.de |
| BURE | Sandahls Equipment AB | SE | In use | sandahls.com |
| BUSH | Budamar South, s.r.o. | SK | In use | budamar.sk |
| BUVL | B&V Leipzig GmbH | DE | In use | |
| BUZ | Bühler AG | CH | Revoked | buhlergroup.com |
| BV | Banverket | SE | Revoked | cityairporttrain.com |
| BVB | Kanton Basel-Stadt | CH | In use | tpc.ch |
| BVHBE | Brücke e.V Blankenburg | DE | In use | verein.bruecke.de |
| BVM | BSM GmbH | DE | In use | bsm-bahn.de |
| BVO | BVO Bahn GmbH | DE | In use | bvo.de |
| BVS | Böhrer Vertriebs und Service GmbH | DE | In use | bbwa.de |
| BW | Bundeswehr | DE | In use | |
| BWA | Besitzgesellschaft Waggonbau Ammendorf mbH | DE | In use | bwa-ammendorf.de |
| BWARN | Förderverein BW Arnstadt historisch e.V. | DE | In use | Lokschuppen-Arnstadt.de |
| BWESA | UWE Adam EVU GmbH | DE | In use | lotrac.de |
| BWKKR | Bahnbetriebswerk Krefeld Betriebs GmbH & Co.KG | DE | In use | bw-krefeld.net |
| BWSHO | STAG AG | CH | In use | stag.net |
| BX | BeNEX GmbH | DE | In use | benex.de |
| BXKOL | BUDIMEX Kolejnictwo S.A. | PL | In use | budimex.pl |
| BXSA | BUDIMEX S.A. | PL | In use | budimex.pl |
| BYB | BayernBahn GmbH | DE | In use | bayernbahn.de |
| BYTKL | Baytek Lojistik Hizm.Inş.Taah.Tic.Ltd.Şti | TR | In use | |
| BZCSA | Baltchem S.A. Zakłady Chemiczne w Szczecinie | PL | In use | |
| BZGB | Gleisbau Bautzen GmbH | DE | In use | gleisbau-bautzen.de |
| BZK | Bulgarian Railway company / Българска железопътна компания | BG | In use | brc-bg.com |
| CAB | Cementa AB | SE | In use | cementa.se |
| CADU | Carl Dume Ingenierbau GmbH + Co. KG | DE | In use | carl-dume.de |
| CAF | Consorzio Armatori Ferroviario S.C.p.A. | IT | In use | |
| CAFCV | CONSTRUCCIONES Y AUXILIAR DE FERROCARRILES | ES | In use | caf.es |
| CAFFR | CAF REICHSHOFFEN SAS | FR | In use | caf.net |
| CAGBS | Contargo AG | CH | In use | contargo.ch |
| CAMY | CAMYFÓN, S.L. | ES | In use | camyfon.es |
| CAN | cantus Verkersgesellschaft mbH | DE | In use | cantus-bahn.de |
| CAR | CARBO Kohlensäurewerk Hannover GmbH | DE | In use | carbo.de |
| CARBA | Carbagas | CH | In use | carbagas.ch |
| CARBO | „CARBO” Holding Sp. z o.o. | PL | In use | carboholding.pl |
| CARGO | Cargo Service GmbH | AT | In use | cargoserv.at |
| CAT | City Air Terminal BetriebsgmbH | AT | In use | cityairporttrain.com |
| CATRR | Caterpillar SARL | CH | In use | cat.com |
| CB | City-Bahn Chemnitz GmbH | DE | In use | city-bahn.de |
| CBAG | Cargo Beamer AG | DE | In use | cargobeamer.de |
| CBB | Centralbahn AG | CH | In use | centralbahn.ch |
| CBG | Centralbahn GmbH | DE | In use | centralbahn.de |
| CBM | Club Bm 22-70 | CH | In use | bm22-70.ch |
| CBONE | Prievidzský parostrojný spolok,o.z. | SK | In use | 464001.sk |
| CBR | CBRail Sarl | LU | Revoked | cbrail.com |
| CBRG | CBRail II GmbH | DE | Revoked | cbrail.com |
| CBRL | CBRail Leasing Sarl | LU | Revoked | ascendos.com |
| CBRLG | CBRail Leasing GmbH | LU | Revoked | ascendos.com |
| CBRS | Cargo Beamer RollingStock GmbH | DE | In use | cargobeamer.com |
| CC | C2C Rail | UK | Blocked | c2c-online.co.uk |
| CCB | CHIMCOMPLEX SA | RO | In use | |
| CCBC | CEREALCOM SA | RO | In use | cerealcom-bacau.ro |
| CCD | CEREALCOM DOLJ SRL | RO | In use | |
| CCH | F.S. Logistica S.p.A. | IT | In use | |
| CCL | Connex Cargo Logistics | DE | In use | connex-cargo-logistics.de |
| CCLG | CC-Logistik GmbH & Co. KG | DE | In use | cc-l.eu |
| CCMCP | COMCEREAL SA | RO | In use | comcerealprahova.ro |
| CCOS | CEMENTOS COSMOS, S.A. | ES | In use | |
| CCSK | Commercial Contact SRO | SK | In use | commercialcontact.com |
| CCW | Captrain Deutschland CargoWest GmbH | DE | In use | captrain.de |
| CCZ | COLAS CZ, a.s. | CZ | In use | colas.cz |
| CD | České dráhy, a.s. | CZ | In use | cd.cz |
| CDC | ČD Cargo a.s. | CZ | In use | cdcargo.cz |
| CDCAD | ČD Cargo Adria d.o.o. | HR | In use | cdcargo.cz/adria |
| CDCAR | CEDROB Cargo sp. z o. o. | PL | In use | cedrob.com.pl |
| CDCR | ČD Cargo, a.s. | CZ | Revoked | cdcargo.cz |
| CDCSK | CD Cargo Slovakia, s.r.o. | SK | In use | cdcargo.cz |
| CDCST | CDC STAR SRL | RO | In use | |
| CDF | La Compagnie de France | FR | In use | |
| CEF | Centre d'Essais Ferroviaires | FR | In use | c-e-f.fr |
| CEHD | COMPLEXUL ENERGETIC HUNEDOARA SA - SUCURSALA ELECTROCENTRALE DEVA | RO | In use | termodeva.ro |
| CEHFE | CENTRO DE ESTUDIOS HISTÓRICOS DEL FC ESPAÑOL | ES | In use | cehfe.es |
| CEHP | SOCIETATEA COMPLEXUL ENERGETIC HUNEDOARA SA - SUCURSALA ELECTROCENTRALE PAROSENI SA | RO | In use | separoseni.ro |
| CEHPS | SOCIETATEA COMPLEXUL ENERGETIC HUNEDOARA SA - SUCURSALA PRESTSERV PETROSANI | RO | In use | sdm-cenhd.ro |
| CEK | Colas Északkő Bányászti Kft. | HU | In use | colas.hu |
| CEL | Lebanon Railways | LB | Blocked | |
| CELSA | Celsa Huta Ostrowiec sp. z o.o. | PL | In use | celsaho.com |
| CEMAT | Mercitalia Intermodal SpA | IT | In use | mercitaliaintermodal.it |
| CEMET | CEMET S.A. | PL | In use | cemet.pl |
| CEN | Celanese Emulsions Norden AB | SE | In use | celanese-emulsions.se |
| CENAF | CENEDESE ARMAMENTO FERROVIARIO S.r.l. | IT | In use | |
| CENED | Cenedese SPA | IT | In use | cenedesespa.com |
| CENSI | FRATELLI CENSI SA | CH | In use | censigroup.ch |
| CEOIS | COMPLEXUL ENERGETIC OLTENIA SA - SUCURSALA ELECROCENTRALE ISALNITA | RO | In use | |
| CEP | Cerpini Costruzioni S.r.l. | IT | In use | ceprinicostruzioni.it |
| CER | Central-European Railway AG. | HU | In use | cer.hu |
| CERB | Centralna Energoremontna Baza AD / Централна Енергоремонтна База АД | BG | In use | cerb.bg |
| CEROV | COMPLEX ENERGETIC ROVINARI SA | RO | In use | |
| CERSK | CER Slovakia a.s. | SK | In use | cercargo.sk/index.php |
| CERT | Certis Belchim B.V. Niederlassung Deutschland | DE | In use | certis-railservice.de |
| CETIS | CET SA | RO | In use | cet-iasi.ro |
| CETUR | COMPLEXUL ENERGETIC TURCENI SA | RO | In use | eturceni.ro |
| CFC | LES CHEMINS DE FER DU CREUSOT | FR | In use | train-vapeur.fr |
| CFCB | Chemins de Fer du Centre-Bretagne | FR | In use | cfcb.bzh |
| CFDL | CO.F.EDIL S.r.l. | IT | In use | |
| CFF | Chemins de Fer Federaux Suisses | CH | In use | cff.ch |
| CFHA | Chemins de Fer de la Haute Auvergne | FR | In use | gentiane-express.com |
| CFI | CFI - COMPAGNIA FERROVIARIA ITALIANA SrL | IT | In use | |
| CFL | Soc. Nat. des Chemins de Fer Luxembourgeois | LU | In use | cfl.lu |
| CFLCA | CFL cargo | LU | In use | |
| CFLCD | CFL Cargo Danmark ApS | DK | In use | dansk-jernbane.dk |
| CFLDE | CFL cargo Deutschland | DE | In use | cflcargo.de |
| CFLIF | CFL Gestion Infrastructure | LU | In use | cfl.lu |
| CFLS | CFL Cargo Sverige AB | SE | In use | cflcargo.se |
| CFM | Caile Ferate Moldova | MD | In use | railway.md |
| CFMLD | CONSTRUCTII FEROVIARE MOLDOVA SA | RO | In use | cfm.ro |
| CFMUR | CEFMUR SA | RO | In use | tradetrans.com |
| CFPM | C.F.P.M. | FR | In use | |
| CFR | SNTFM CFR Marfa SA | RO | In use | cfr.ro |
| CFRBF | Compagnie Ferroviaire Regionale | FR | In use | cfr-bfc.com |
| CFRTM | SNCF "CFR" SA - SUCURSALA CREIR CF TIMISOARA | RO | In use | cfrtm.ro |
| CFS | Administration Générale des Chemins de Fer Syriens | SY | In use | |
| CFSP | CER FERSPED SA | RO | In use | |
| CFT | Čechofracht a.s. | CZ | In use | |
| CFTA | Société Génerale de Chemin de Fer et de Transports Automobiles (CFTA) | FR | In use | cfta.fr |
| CFTLP | Chemin de Fer Touristique Limousin Périgord | FR | In use | trainvapeur.com |
| CFTST | Chemin de Fer Touristique Sud Touraine | FR | In use | cftsudtouraine.e-monsite.com |
| CFTV | Chemin de Fer Touristique du Vermandois | FR | In use | cftv.fr |
| CG | Christian Guldberg AB | SE | In use | |
| CH | Chemins de Fer Hellénique | EL | In use | ose.gr |
| CHEMS | Chems, a.s. Humenné | SK | In use | |
| CHMGS | CHEMGAS HOLDING CORPORATION SRL | RO | In use | |
| CHMT | LANXESS Organometallics GmbH | DE | In use | lanxess.com |
| CHMU | Chemetall GmbH | DE | In use | chemetall.com |
| CHR | Cement Hranice, akciová společnost | CZ | In use | |
| CHRIS | Dennis Christensen Kfz-Onlinehandel | DE | In use | |
| CHSLO | Chemko, a.s. Slovakia | SK | In use | chemko.sk |
| CHSMK | Chojnickie Stowarzyszenie Miłośników Kolei | PL | In use | smk-chojnice.pl |
| CHTHB | Chládek a Tintěra Havlíčkův Brod, a.s. | CZ | In use | chladek-tintera.cz |
| CHTLT | Chládek & Tintěra, a.s. | CZ | In use | |
| CHTPC | Chládek a Tintěra, Pardubice a.s. | CZ | In use | cht-pce.cz |
| CHUE | Chemie Uetikon AG | CH | Revoked | uetikon.ch |
| CIAY | Cİ - AY MÜH. MİMARLIK İNŞ. ÖZEL SAĞLIK HİZ. EMLAK TURİZM SAN. VE TİC. LTD. ŞTİ | TR | ?n use | |
| CICA | CISA SA | CH | In use | cica.ch |
| CIE | Iarnrod Eireann (Coras Iompair Eireann) | IE | Blocked | cie.ie |
| CIER | Compagnie Internationale des Evénements sur Rail s.à.r.l. | LU | In use | cier.lu |
| CIMP | Cimpor - Cimentos de Portugal, SA | PT | In use | cimpor.pt |
| CIN | CINKARNA CELJE D.D. | SI | In use | |
| CIOSC | CIOS Cargo | HR | In use | ciosgrupa.com |
| CIS | Cisalpino SA | CH | Revoked | cisalpino.com |
| CITEV | CITEV (Compagnie Internationale des Trains Express à Vapeur) | FR | In use | trainavapeur.com |
| CITR | CONSTRUCCIONES INSTALACIÓN Y TRACCIÓN, S.A.U. | ES | In use | citracc.com |
| CIWL | Compagnie des Wagon-Lits | BE | In use | wagons-lits-paris.com |
| CJ | Compagnie des chemins de fer du Jura | CH | In use | cj-transports.ch |
| CKD | Chemle Kelhelm GmbH | DE | In use | chemie-kelheim.de |
| CKL | CTL Chemkol Sp. Z o.o. | PL | In use | ctl.pl |
| CKOCH | Christian Koch | DE | In use | |
| CKTZ | Centar za Kombinirani Transport Zagreb d.d. | HR | In use | cktz.hr |
| CL | Cargolink AS | NO | In use | cargolink.no |
| CLARI | Weylchem Lamotte SAS | FR | In use | weylchem.com |
| CLB | Chiemgauer Lokalbahn Betriebsgesellschaft mbH & Co. KG | DE | In use | chiemgauer-lokalbahn.com |
| CLBLO | C +L Consult & Logistik GmbH | DE | In use | |
| CLCAL | CL Cargo Logistics sp. z o. o. | PL | In use | clcargo.pl |
| CLEU | EUROPORT SP. Z.O.O. | PL | In use | |
| CLF | Costruzioni Linee Ferroviarie S.p.A. | IT | In use | clfspa.it |
| CLG | Chemion Logistik GmbH - Bahnbetriebe | DE | In use | chemion.de |
| CLIP | CLIP Intermodal sp. z o.o. | PL | In use | clip-group.com |
| CLIPL | CLIP Logistyka sp. z o.o. | PL | In use | clip-group.com |
| CLL | Centrum Logistyczne w Łosośnej sp. z o.o. | PL | In use | cllososna.pl |
| CLMTP | CLMTP | FR | In use | clmtp.fr |
| CLOK | Česká lokomotivka, s.r.o. | CZ | In use | lokomotivka.cz |
| CLR | Cargo Logistik Rail Service GmbH | DE | In use | clr-service.de |
| CLRA | Classic Rail AG | CH | In use | |
| CM | Chemin de Fer de Chamonix au Montenvers | FR | Revoked | |
| CMAE | CONSTRONIC MAE SA | RO | In use | |
| CMB | Compagnie du Mont Blanc | FR | Revoked | |
| CMBC | Société coopérative du Chemin de fer — Musée Blonay-Chamby | CH | In use | blonay-chamby.ch |
| CMC | Českomoravský cement, a.s., nástupnická společnost | CZ | In use | |
| CMCPL | CMC Poland sp. z o.o. | PL | In use | cmc.com |
| CMCZ | CMC ZAWIERCIE S.A | PL | In use | cmcpoland.com |
| CMD | FORMER, s.r.o. | CZ | In use | |
| CMDPS | CARGO Master Sp. z o.o. | PL | In use | cargomaster.pl |
| CME | Comsa Machinery and Equipments | ES | In use | comsa.com |
| CMED | Cumerio-Med AG / Кумерио Мед АД | BG | In use | |
| CMKS | ČMKS - Jihlavská lokomotivní společnost s.r.o. | CZ | In use | |
| CMO | Cargo Motion s.r.o. | CZ | In use | cargom.cz |
| CMS | Christoph Merian Stiftung / C.M.S. | CH | In use | merianstiftung.ch |
| CMSFR | COMASFER S.L | ES | In use | comasfer.es |
| CMT | CENTROMAT s.r.o. | CZ | In use | |
| CMZO | Českomoravská železniční opravna s.r.o. | CZ | In use | cmzo.cz |
| CN | CargoNet AS | NO | In use | cargonet.no |
| CNA | COBRENA ACHATS | FR | In use | |
| CNCFR | Compania Nationala de Cai Ferate " CFR " S.A | RO | In use | rdslink.ro |
| CNFCT | CNCF-SUCURSALA RCF CONSTANTA | RO | In use | |
| CNFGL | CNCF CFR SA - SUCURSALA REGIONALA CF GALATI | RO | In use | cfr.ro |
| CNFIS | CNCF-SUCURSALA REGIONALA CF IASI | RO | In use | |
| CNL | CityNightLine CNL AG | CH | Revoked | citynightline.ch |
| CNU | COMPANIA NATIONALA A URANIULUI S.A. | RO | In use | cnu.ro |
| CNX | Connex | FR | Revoked | |
| CO | CEMOS Ostrava, a.s. | CZ | In use | |
| Coal | Coal services a.s. | CZ | In use | coalservices.cz |
| COALV | COALVI, SA | ES | In use | coalvi.es |
| COBR | COBRA | ES | In use | grupocobra.com |
| COBRA | Cobelfret Rail NV | BE | Revoked | cobelfret.com |
| COCSA | COMPAÑIA DE OBRAS CASTILLEJOS, S.A. | ES | In use | ferrovial.com |
| COEF | COEF s.r.l. | IT | In use | |
| COG | Kolejowe Zakłady Nawierzchniowe COGIFER POLSKA Sp. z o.o. | PL | In use | vossloh-cogifer.pl |
| COGI | COGIVEN s.r.l. | IT | In use | |
| COLAS | COLAS Epito Zrt | HU | In use | colas.hu |
| COLGB | COLAS Rail Ltd | UK | In use | colasrail.co.uk |
| COLRA | Colas Rail | FR | In use | colasrail.com |
| COMAX | COMAX-TT, a.s. | SK | In use | comaxtt.sk |
| COMBE | Pokorny Bohumil Ing. | CZ | In use | |
| COMBH | COMAT BIHOR SA | RO | In use | |
| COMCM | COMCM Constanta | RO | In use | comcm.ro |
| COMSA | COMSA INSTALACIONES Y SISTEMAS INDUSTRIALES | ES | In use | comsa.com |
| CON | Consulting4Rail GmbH | CH | In use | consulting4rail.ch |
| CONEX | CONEXVÍAS LEVANTINAS S.L. | ES | In use | conexvias.es |
| CONRA | Construrail, S.A. | ES | In use | constru-rail.es |
| CONSA | Constellium Valais SA | CH | In use | constellium.com |
| CONT | CONTERO sp. z o.o. sp. k. | PL | In use | |
| CONTC | Contec Rail Aps | DK | In use | contec.dk |
| CONTE | CONTERO sp. z o.o. sp. k. | PL | In use | |
| CONVE | CONVEY, a.s. | SK | In use | |
| COPEF | Cercle Ouest Parisien d'Etudes Ferroviaires | FR | In use | copef.org |
| COPRO | CONSTRUCCIONES Y PROMOCIONES COPROSA S.A. | ES | In use | coprosa.es |
| COS | COSFER | IT | In use | |
| COSF | CONTRATAS Y SERVICIOS FERROVIARIOS, (COSFESA) | ES | In use | grupoortiz.com/cosfesa/ |
| COTR | Cotral S.p.A. | IT | In use | cotralspa.it |
| CP | Caminhos de Ferro Portugeses, E.P. | PT | In use | cp.pt |
| CPCLP | CP Cargo Logistica e Transoportes Ferroviários de Mercadorias, SA | PT | Revoked | cpcarga.pt |
| CPFBZ | COMPANIA DE PRODUCTIE FEROVIARA SRL | RO | In use | |
| CPS | SOCIEDAD ANÓNIMA DE OBRAS Y SERVICIOS, COPASA | ES | In use | copasagroup.com |
| CPSAN | COMPAGNIA PORTUALI SERVIZI SOC.COOP. | IT | In use | |
| CPT | Conpet SA Ploiesti | RO | In use | |
| CPTF | CAPTRAIN France | FR | In use | captrain.fr |
| CPTIP | CARGO Przewozy Towarowe i Pasażerskie sp. z o.o. | PL | In use | |
| CPTRO | CAPTRAIN ROMANIA SRL | RO | In use | |
| CPTT | Cargo Przewozy Towarowe, Transport sp. z o.o. sp. k. | PL | In use | cptt.pl |
| CQC | CQC i Sverige AB | SE | In use | |
| CR | Chiltern Railways | UK | In use | chilternrailways.co.uk |
| CRA | Peter Cramer GmbH & Co. KG | DE | In use | cramer-arbeitsbuehnen.de |
| CRAIL | CONTINENTAL RAIL | ES | In use | continentalrail.es |
| CRB | COLAS RAIL Belgium | BE | In use | |
| CRBCP | CARBONIFERA SA - PUNCT DE LUCRU CARBONIFERA CÂMPULUNG | RO | In use | |
| CRCTR | CEREALCOM SA | RO | In use | |
| CREW | Stichting 2454 CREW | NL | In use | 2454crew.nl |
| CRF | CO.RAC.FER S.R.L. | IT | In use | coracfer.it |
| CRI | CARGO RAIL ITALY SRL | IT | In use | captrain.it |
| CRL | CRL Car Rail Logistics GmbH | AT | In use | carrail.com |
| CRO | Cargo Rail s.r.o. | CZ | In use | |
| CROBE | Cronimet Belgium NV | BE | In use | cronimet.com |
| CRONI | Cronifer | NL | In use | cronifer.nl |
| CROSS | Crossrail AG | CH | Revoked | crossrail.ch |
| CRP | Colas Rail Polska sp. z o. o. | PL | In use | colasrail.pl |
| CRR | Carbo Rail, s.r.o. | SK | Revoked | |
| CRRC | CRRC ZELC VERKEHRSTECHNIK GMBH | AT | In use | crrcgc.cc/zjen |
| CRS | CRS- Continental Rail Services B.V. | NL | In use | crs-rail.com |
| CRSA | Contec Rail Safety ApS | DK | In use | |
| CRSHU | Continental Railway Solution Kft. | HU | In use | continentaltrain.com |
| CRTSA | COMSA RAIL TRANSPORT, S.A. | ES | Revoked | comsaemte.com |
| CRW | CENTRAL RAILWAYS s.r.o. | SK | In use | |
| CSDLM | České soukromé dráhy spol. s.r.o. | CZ | In use | |
| CSE | Connex Sout Eastern | UK | Blocked | connex.co.uk |
| CSG | Club del San Gottardo | CH | In use | clubsangottardo.ch |
| CSGPL | CARMENSIMI GRUP SRL | RO | In use | |
| CSOL | Československá obec legionářká | CZ | In use | csol.cz |
| CSPED | CARGOSPED Sp. z o.o | PL | In use | |
| CSV | CargoServ GmbH | AT | Revoked | logserv.at |
| CT | Central Trains | UK | Blocked | centraltrains.co.uk |
| CTB | Captrain Belgium NV | BE | In use | sncf.be |
| CTBAS | CTB a.s. | CZ | In use | ctbas.cz |
| CTC | CTC (Compagnie de Transports de Céréales | FR | In use | ctc-sa.fr |
| CTD | Captrain Deutschland GmbH | DE | In use | captrain.de |
| CTEAR | Center Tea & Co SRL | RO | In use | centerteaco.ro |
| CTES | CAPTRAIN ESPAÑA | ES | In use | captrain.es |
| CTF | COMPANIA DE TRANSPORT FEROVIAR BUCURESTI SA | RO | In use | ctf.ro |
| CTFER | Impresa COSTFER S.r.l. | IT | In use | fventura.it |
| CTI | CAPTRAIN ITALIA | IT | In use | fretitalia.com |
| CTL | CTL Logistics GmbH | DE | In use | |
| CTLCZ | CTL Logistics, s.r.o. | CZ | In use | ctl.pl |
| CTLK | CTL Kolzap Sp. z o.o. | PL | In use | |
| CTLKP | CTL KARGO Sp. z o.o. | PL | In use | ctl.pl |
| CTLL | CTL Logistics Sp. z o.o. | PL | In use | |
| CTLLK | CTL LOK Sp. z o.o. | PL | In use | ctl.pl |
| CTLMB | CTL Maczki - Bór Spólka z o.o. | PL | In use | ctlmaczki.pl |
| CTLP | CTL Północ Sp. z o.o. | PL | In use | |
| CTLS | CTL Service sp. z o. o. | PL | In use | ctl.pl |
| CTLSK | CTL SLOVAKIA, s.r.o. | SK | In use | ctl.eu |
| CTLT | CTL Tankpol Sp. z o.o. | PL | In use | |
| CTLW | CTL Wagony Sp. z o.o. | PL | In use | |
| CTPL | Captrain Polska sp. z o. o. | PL | In use | captrain.pl |
| CTR | CityRail, a.s. | CZ | In use | cityrail.cz |
| CTRFM | Consorzio Triveneto Rocciatori | IT | In use | |
| CTRL | Channel Tunnel Rail Link | UK | Blocked | ctrl.co.uk |
| CTSF | CTSF | FR | In use | |
| CTV | CARGO TRANS VAGON S.A. | RO | In use | tts-group.ro |
| CTVBG | Cargo Trans Wagon Blgaria AD | BG | In use | |
| CTVJ | Compagnie du Train à Vapeur de la Vallée de Joux | CH | In use | ctvj.ch |
| CTVRF | SC RAFFINACHEM Ltd | CY | In use | |
| CVI | C. Vanoli AG | CH | In use | c-vanoli.ch |
| CVS | CONTRATAS Y VENTAS, S.A. | ES | In use | |
| CVT | Carlo Vanoli AG Thalwil | CH | In use | vanoli-ag.ch |
| CWAG | Cargo Wagon, a.s. | SK | In use | |
| CWAYT | CARGOWAY TABOR sp. z o.o. | PL | In use | cargoway.pl |
| CWL | Compagnie Internationale des Wagons-Lits et du Tourisme SA | AT | In use | cwl-services.com |
| CX | CEMEX Czech Republic, s.r.o. | CZ | In use | |
| CXM | Veolia Transport Morava a.s. | CZ | In use | connexmorava.cz |
| CXXN | Connexxion | NL | In use | connexxion.nl |
| CYCAS | CYCASA CANTERAS Y CONSTRUCCIONES, S.A. | ES | In use | cycasa.com |
| CYMI | CONTROL Y MONTAJES INDUSTRIALES CYMI S.A. | ES | In use | cymimasa.com |
| CZA | Club 1018 | AT | In use | club1018.at |
| CZL | CZ LOKO, a.s. | CZ | In use | czloko.cz |
| CZLPL | CZ LOKO Polska Sp. z o.o. | PL | In use | czloko.pl |
| CZPD | Plzeňská dráha, z.s. | CZ | In use | plzenskadraha.cz |
| CZR | Centar Za Reciklažu, Beograd | RS | In use | czr.co.yu |
| DAB | DAB Rail sp. z o. o. | PL | In use | |
| DACIA | AUTOMOBILE DACIA SA | RO | In use | |
| DAD | D'ADIUTORIO APPALTI E COSTRUZIONI SRL | IT | In use | dadiutorio.it/ |
| DALA | Ludwig Dalacker& Sohn , Inh. Kurt Dalacker | DE | In use | dalacker.de |
| DAMA | DAMA - D.P. d.o.o. | HR | In use | dama-dp.hr |
| DAMPF | Kieldampf GmbH | DE | In use | kieldampf.de |
| DAN | DSB aarhus Nærbane A/S | DK | In use | |
| DANDD | D&D ELECTRO PARTNERS SRL | RO | In use | d-d.ro |
| DAU | DAU Eisenbahn-, Straßen- und Tiefbau GmbH | DE | In use | dau-bauunternehmen.de |
| DAW | Centrala Obrotu Towarami Masowymi DAW-BYTOM Sp. z o.o. | PL | In use | daw.bytom.pl |
| DAXI | DAXI SA | RO | In use | daxi.be |
| DB | Deutsche Bahn / DB AG | DE | In use | bahn.de |
| DBCBG | DB Cargo Bulgaria | BG | In use | |
| DBCCH | DB Cargo Schweiz GmbH | CH | In use | ch.dbcargo.com |
| DBCCZ | DB Cargo Czechia s.r.o. | CZ | In use | cz.dbcargo.com |
| DBCFR | DB Cargo France | FR | Revoked | fr.dbcargo.com/rail-fr-fr |
| DBCSC | DB Cargo Scandinavia | DK | In use | dbcargo.com/dk |
| DBFWD | DB Fahrwegdienste GmbH | DE | In use | fahrweg.dbnetze.com/fahrwegde/unternehmen/db_netz_ag/externe_organisationen/fahrwegdienste-1368662 |
| DBFZI | DB Fahrzeuginstandhaltung GmbH | DE | In use | bahn.de |
| DBG | DB Bahnbau Gruppe GmbH | DE | Revoked | |
| DBGM | Döllnitzbahn GmbH | DE | In use | doellnitzbahn.de |
| DBH | DB Cargo Hungária Kft | HU | In use | hu.dbcargo.com |
| DBINF | Infra SILESIA S.A. | PL | In use | |
| DBKT | DB Kommunikationstechnik GmbH | DE | In use | deutschebahn.com |
| DBMP | DB Netz AG | DE | In use | dbnetze.com |
| DBSBG | DB Cargo Bulgaria | BG | Revoked | |
| DBSCH | DB Schenker Rail Schweiz GmbH | CH | In use | rail.dbschenker.ch |
| DBSKR | SCHENKER ROMTRANS SA | RO | In use | dbschenker-romtrans.com |
| DBSLR | SCHENKER LOGISTICS ROMANIA SRL | RO | In use | |
| DBSNI | DB Cargo Logistics GmbH | DE | In use | nieten.dbcargo.com |
| DBSPL | East West Railways Sp. Z.o.o. | PL | Revoked | |
| DBSR | SC Deutsche Bahn Cargo Romania SRL | RO | In use | ro.dbcargo.com |
| DBSRH | DB Schenker Rail Hungária Kft | HU | Revoked | |
| DBSRP | DB Cargo Polska S.A. | PL | In use | dbcargo.com |
| DBSRR | DB Schenker Rail Rybnik s.a. | PL | Revoked | dbschenker.com |
| DBSRS | DB Cargo Spedkol Spółka z o.o. | PL | In use | dbcargo.com |
| DBSUK | DB Schenker Rail (UK) Ltd | UK | In use | rail.dbschenker.co.uk |
| DBV | Järnvägsföreningen Dellenbanans vänner | SE | In use | dellenbanan.nu |
| DBZ | Dolderbahn-Betriebs-AG | CH | In use | |
| DCT | DC Tractie | NL | In use | dctractie.nl |
| DDF | Verein 241A65 | CH | In use | 241a65.ch |
| DDL | Compagnie Ferroviaire du Léman (CFDL) | CH | In use | cfdl.ch |
| DDM | Deutsches Dampflokomotiv Museum | DE | In use | dampflokmuseum.de |
| DDR | Eisenbahnunternehmen Großheim | DE | In use | |
| DDSV | ĐURO ĐAKOVIĆ Specijalna vozila d.d. | HR | In use | ddsv.hr |
| DE | Dortmunder Eisenbahn GmbH | DE | In use | dortmunder-eisenbahn.de |
| DE | in use | kpl | | |
| DEBG | Dampfzug-Betriebs-Gemeinschaft e.V. | DE | In use | dampfzug-betriebs-gemeinschaft.de |
| DEGUS | Röhm GmbH | DE | In use | |
| DEJA | DEJA&DELIVERY SRL | RO | In use | |
| DELIC | Delica AG | CH | In use | delica.ch |
| DELT | DELTA GAS COV SRL | RO | In use | |
| DELTA | DeltaRail GmbH | DE | In use | deltarail.de |
| DEN | Dampfeisenbahn Niedehein e.V. | DE | In use | dampfeisenbahn-niederrhein.de |
| DEPOL | Przedsiębiorstwo Obrotu Surowcami Wtórnymi DEPOL Sp. z o.o. | PL | In use | depol.com.pl |
| DESP | Despotija d.o.o. | RS | In use | despotija.rs |
| DESTI | Destia Rail Oy | FI | In use | destia.fi |
| DEV | Deutsche Eisenbahn Verein e.V. | DE | In use | museumseisenbahn.de |
| DEW | Dampfeisenbahn Weserbergland e.V. | DE | In use | dampfeisenbahn-weserbergland.de |
| DEZA | DEZA, a.s. Valašské Meziřiči | CZ | In use | deza.cz |
| DFB | Dampfbahn Furka-Bergstrecke AG | CH | In use | dfb.ch |
| DFC | DELCOURT RAIL | FR | In use | |
| DFS | Dampfbahn Fränkische Schweiz e.V | DE | In use | dfs.ebermannstadt.de |
| DGB | DG Rail SA | CH | In use | |
| DGEG | DGEG Bahnen & Reisen Bochum AG | DE | In use | |
| DGEGN | Deutsche Gesellschaft für Eisenbahngeschichte e.V. NIederlassung Eisenbahnmuseum Neustadt | DE | In use | dgeg.de |
| DGEGW | DGEG Bahnen & Reisen Würzburg GmbH | DE | In use | eisenbahnmuseum-wuerzburg.de |
| DGM | Dampflok-Gesellschaft München e.V. | DE | In use | dgm-41018.de |
| DGMT | Deutsche Gleisbau Material Transport GmbH | DE | In use | |
| DGT | DB Bahnbau Gruppe GmbH | DE | Revoked | |
| DGU | DGU Deutsche Gleisbau-Union GmbH & Co. KG | DE | In use | dgu-international.de |
| DH | Aktien-Gesellschaft der Dillinger Hüttenwerke | DE | In use | dillinger.de |
| DHE | Delmenhorst-Harpstedter Eisenbahn | DE | In use | dhe-reisen.de |
| DHEF | Delmenhorst-Harpstedter Eisenbahnfreunde e.V. | DE | In use | dhef.de |
| DI | D.I. Diversified Investments SA | CH | In use | d-i.ch |
| DIAMO | DIAMO, státní podnik | CZ | In use | |
| DIEBM | Die Bahnmeisterei | DE | In use | diebahnmeisterei.de |
| DIENO | Dieselnostalgie Schienenfahrzeugbereitstellungs GmbH | AT | In use | |
| DIOSM | DIOKI d.d. | HR | In use | dioki.hr |
| DISA | Mescola GmbH | CH | In use | |
| DISPO | Mitsui Rail Capital Europe GmbH | DE | In use | dispolok.com |
| DITAS | DITURIA a.s. | SK | In use | dituria.sk |
| DJM | Danmarks Jernbanemuseum | DK | In use | jernbanemuseet.dk |
| DKB | Dürener Kreisbahn | DE | In use | dkb-dn.de |
| DKBE | Diepholzer Kreisbahn EVU GmbH | DE | In use | kreisbahn.com |
| DLA | DOLNOŚLASKIE LINIE AUTOBUSOWE Sp.z o.o. | PL | In use | dla.com.pl |
| DLB | Die Länderbahn GmbH DLB | DE | In use | laenderbahn.com |
| DLBCZ | Die Länderbahnen CZ s.r.o. | CZ | In use | laenderbahn.com |
| DLC | Dampflokiclub Herisau | CH | In use | bt9.ch |
| DLD | Delitzscher Landhandel & Dienste GmbH (DLD GmbH) | DE | In use | dld-delitzsch.de |
| DLFB | Dampflokfreunde-Berlin e.V | DE | In use | dampflokfreunde-berlin.com |
| DLFS | Damflokfreunde Salzwedel e.V | DE | In use | dampflok-salzwedel.de |
| DLGB | AG Osthavelländische Kreisbahnen e.V. | DE | In use | dampflokgemeinschaft-brandenburg.de |
| DLHBS | Traditionsgemeinschaft 50 3708 e.V | DE | In use | dampflok-halberstadt.de |
| DLI | Die-Lei GmbH | DE | In use | die-lei-gleisbau.de |
| DLK | Das Letzte Kleinod GbR | DE | In use | das-letzte-kleinod.de |
| DLL | Leipa Logistik GmbH | DE | In use | leipa-log.com |
| DLM | DLM AG | CH | In use | dlm-ag.ch |
| DLS | DALSAN ALÇI SANAYI VE TICARET A.S. | TR | In use | dalsan.com.tr/ |
| DLSK | Deutsche Leasing Slovakia spol. s r.o. | SK | In use | |
| DLV | Dampfloki-Verein AB | CH | In use | dampfloki.ch |
| DMA | DEMİR YAPI İNŞAAT TİCARET VE SANAYİ A.Ş. | TR | In use | demiryapi.com.tr/ |
| DME | Deutsche -Museums-Eisenbahn GmbH | DE | In use | |
| DMG | DMG, s.r.o. | SK | In use | |
| DMHK | Dampflokmuseum Hermeskeil | DE | In use | |
| DMI | DEMİRYAPI İNŞ.TAAH. VE DAHİLİ TİCARET - Raşıt DEMİR | TR | In use | demiryapi.com.tr/ |
| DMVRC | „ДMB” EООД | BG | In use | |
| DNV | DNV-Verlag /DNV Touristik GmbH | DE | In use | dnv-tours.de |
| DO | Donner GmbH | DE | In use | donner-gmbh.de |
| DOL | "Żwirownia Dolata", "Beton Dolata" Agnieszka Dolata | DE | In use | mdolata.pl |
| DOLVA | DOLVAP, s.r.o. | SK | In use | dolvap.sk |
| DOLWR | Dolnośląskie Przedsiębiorstwo Napraw Infrastruktury Komunikacyjnej DOLKOM Sp. z o.o. | PL | In use | dolkom.pkp.wroc.pl |
| DONAU | DONAU CHEM SRL | RO | In use | |
| DORUK | DORUK TRANS ULUSLAR ARASI TAŞIMACILIK LTD.ŞTİ | TR | In use | doruktrans.com |
| DOW | DOW Sverige AB | SE | In use | |
| DOZEM | dornburger zement GmbH & Co. KG | DE | In use | dornburger-zement.de |
| DP | DP Deutsche Privatbahn GmbH | DE | In use | |
| DPAPL | Duisport Agency Polska sp. z o. o. | PL | In use | duisport.de/?lang=en |
| DPB | DPB Rail Infra Service GmbH | AT | In use | dpb.at |
| DPLA | Deutsche Plasser Bahnbaumaschinen GmbH | DE | In use | deutsche-plasser.de |
| DPO | Dinazzano Pò S.p.A. | IT | In use | dpspa.it |
| DPOV | PDPOV, a.s. | CZ | In use | dpov.cz |
| DPR | duisport rail GmbH | DE | In use | duisport-rail.de |
| DPSK | Daisy plus, s.r.o. | SK | In use | |
| DR | Deutsche Regionalbahn | DE | In use | |
| DRAGA | Drachen-Propan GmbH | DE | In use | |
| DRAIN | DRAINSAL, S.L.U. | ES | In use | drainsal.es |
| DRE | Deutsche Regional-Eisenbahn | DE | In use | regionaleisenbahn.de |
| DRK | Lučební závody Draslovka a.s. Kolín | CZ | In use | |
| DRS | Direct Rail Services | UK | In use | directrailservices.com |
| DRSLV | DORSALVE, SL | ES | In use | dorsalve.com |
| DRT | DRT Danubius Rail Transport Ltd. | HU | In use | danubiusrailtransport.hu |
| DRXUK | Drax Power Ltd. | UK | In use | drax.com |
| DS | DS VASÚT KFT | HU | In use | dsvasut.uniweb.hu |
| DSB | Danske Statsbaner | DK | In use | dsb.dk |
| DSBS | DSB S-tog a/s | DK | In use | s-tog.dk |
| DSC | DS Cargo, s.r.o. | SK | In use | |
| DSCHT | Duchcovská svařovna,a.s. | CZ | In use | dscht.cz |
| DSCR | Discordia Plc | BG | In use | discordia.bg |
| DSF | Verein DSF | CH | In use | draisine.ch |
| DSG | DAN STEEL GROUP BECLEAN SA | RO | In use | |
| DSM | DSM Nutritional Products, Werk Sisseln | CH | In use | dsm.com |
| DSP | Dopravné Stavby Púchov, s.r.o. | SK | In use | |
| DSSST | DSS servicetech s.r.o. | CZ | In use | |
| DST | Dstrainrail S.A | PT | In use | dstrainrail.com |
| DSVIT | DSV SpA | IT | In use | dsv.com |
| DTBEK | MÁV Dunántúli Távközlési és Biztosítóberendezés Építő Kft. | HU | In use | dtb.hu |
| DTF | Dispo Tf Rail GmbH | DE | In use | dispo-tf.de |
| DTFT | Djspo-Tf Technical Service GmbH | DE | In use | technical.dispotf.de/ |
| DTO | Dampflok Tradition Oberhausen e.V | DE | In use | dampfloktradition.de |
| DTR | DORI TRANS SRL | RO | In use | doritrans.ro |
| DTURK | DEMIRTÜRK TREN TAŞIMACILIK A.Ş. | TR | In use | demirturktren.com |
| DUA | Dualogis GmbH | DE | In use | dualogis.de |
| DUBV | Duisburg Baumaschinen Vermietungs GmbH | DE | In use | |
| DUCHE | S.A. DUCHENE | BE | In use | duchene-sa.be |
| DUD | D & D Eisenbahngesellschaft mbH | DE | In use | dud-eisenbahn.de |
| DUKOL | DUKOL Ostrava, s.r.o. | CZ | In use | |
| DUNAV | Dunavagon Kft. | HU | In use | |
| DUO | DUOmobile GmbH | DE | In use | duomobile.de |
| DUROC | Duroc Rail AB | SE | In use | duroc.se |
| DURTR | DURTRACK GmbH | DE | In use | |
| DUS | Diringer & Scheidel Bauunternehmung GmbH & Co. KG | DE | In use | dus.de |
| DUSLO | DUSLO a.s. | SK | In use | duslo.sk |
| DVE | Dessauer Verkehrs- und Eisenbahngesellschaft mbH | DE | In use | dvv-dessau.de |
| DVF | DVF | FR | In use | dvfgroupe.fr |
| DVVJ | Dal-Västra Värmlands Järnväg | SE | In use | dvvj.com |
| DVVO | Ministry of Defence Movement and Tansport Organisation | NL | In use | |
| DVZO | Dampfbahn-Verein Zürcher Oberland | CH | In use | dvzo.ch |
| DWK | DWK GmbH | DE | In use | dwk-service.de |
| DWVDC | De Witte-Vandecaveye BV | BE | In use | dewittevdc.be |
| DZK | OZ Detská železnica Košice | SK | In use | detskazeleznica.sk |
| DZKD | Detská železnica Košice – Doprava, s. r. o. | SK | In use | detskazeleznica.sk |
| DZLMV | DHL Food Services GmbH | DE | In use | dhl.com |
| EAHD | EAH Eisenbahn Anlangen Handel GmbH | DE | In use | |
| EARTH | EARTHMOVIMG s.r.o. | CZ | In use | |
| EASM | Easmar Logistics Oy | FI | In use | easmar.fi |
| EAT | EQOS-Energie Österreich GmbH | AT | In use | eqos-energie.com |
| EAV | Ente Autonomo Volturno s.r.l. | IT | In use | eavcampanianordest.it |
| EB | Ernst Becker Bahn und Tiefbau GmbH | DE | In use | becker-bahnbau.de |
| EBAB | Elektrobyggnad Sverige AB | SE | Revoked | elektrobyggnad.se |
| EBAG | EBAG Elbe Baumaschinen GmbH & CoKG | DE | In use | |
| EBBEV | Verein Erzbergbahn | AT | In use | erzbergbahn.at |
| EBC | EBC Elsenbahnbetriebs und Consulting GmbH | DE | In use | |
| EBEFW | Eisenbahnfreunde Wetterau e.V | DE | In use | ef-wetterau.de |
| EBFL | Verein der Eisenbahnfreunde in Lienz | AT | In use | |
| EBG | Eisenbahn-Betriebsgesellschaft | DE | In use | |
| EBGL | Emeran Braun GmbH & Co. KG | DE | In use | emeran-braun.de |
| EBM | EBM Cargo GmbH | DE | In use | ebm.de |
| EBMKD | Eisenbahn-Museum-und Nostalgieclub Knittelfeld | AT | In use | |
| EBN | Eisenbahnbedarf Bad Nauheim | DE | In use | |
| EBS | Erfurter Bahnservice GmbH | DE | In use | erfurter-bahnservice.de |
| EBT | EBT - EMONS Bahntransporte GmbH | DE | In use | |
| EBW | Eisenbahnbewachungs-GmbH | DE | In use | ebw-online.com |
| EBWBN | Eisenbahnverkehr Wetterau GmbH (EBW) | DE | In use | ebw.gmbh |
| ECA | Eisenbahnclub Aschersleben e.V. | DE | In use | eisenbahnclub-asl.de |
| ECAU | ELETRIC Schaltanlagenfertigung GmbH | DE | In use | |
| ECB | ELECTROCARBON SLATINA SA | RO | In use | |
| ECCO | ECCO-Cargo-Rail-GmbH | DE | Revoked | |
| ECCOA | ecco-rail GmbH | AT | In use | ecco-rail.at |
| ECCOR | Ecco Rail Sp. z o.o. | PL | In use | ecco-rail.eu |
| ECFER | ECHIPAMENTE FEROVIARE SRL | RO | In use | |
| ECISA | Ecisa, Compaňia general de construcciones, S.A | ES | In use | ecisa.es |
| ECKE | PGE Górnictwo i Energetyka Konwencjonalna S.A. Oddział Elektrociepłownia Kielce | PL | In use | eckielce.pgegiek.pl |
| ECKSA | EDF Polska S.A. | PL | In use | eckrakow.pl |
| ECL | PGE Górnictwo i Energetyka Konwencjonalna S.A. Oddział Elektrociepłownia Lublin Wrotków | PL | In use | ec.lublin.pl |
| ECML | East Coast Main Line Ltd. | UK | In use | eastcoast.co.uk |
| ECMS | ECM – Service UG | DE | In use | ecm-service.com |
| ECOD | ECODIESEL S.A. | RO | In use | |
| ECOM | ECOMETAL SIB SRL | RO | In use | |
| ECOSA | Energetyka Cieplna Opolszczyzny S.A. | PL | In use | ec.opole.pl |
| ECR | DB Cargo France | FR | In use | fr.dbcargo.com/rail-fr-fr |
| ECS | EUROVIA CS, a. s. | CZ | In use | eurovia.cz |
| ECTF | EC Transporturi Feroviare SRL | RO | In use | |
| EDE | EQOS Energie Deutschland GmbH | AT | In use | eqos-energie.com |
| EDG | Eisenbahndienstleister GmbH | CH | In use | eisenbahndienstleister.ch |
| EDIKT | Edikt a.s. | CZ | In use | edikt.cz |
| EE | Edelaraudtee | EE | Blocked | edel.ee |
| EEA | EUREGIO EISENBAH Ahaus-Alstätte | DE | In use | euregio-eisenbahn.de |
| EEB | Emsländische Eisenbahn GmbH | DE | In use | eeb-online.de |
| EETC | EuroExpress Train Charter | NL | In use | skitrein.nl |
| EEWS | EEWS spol. s r.o. | CZ | In use | |
| EEWSS | EEWS spol. s.r.o. | SK | In use | |
| EEX | Europe Express | FR | In use | |
| EFB | Eisenbahnfreunde Breisgau e.V. | DE | In use | rebenbummler.de |
| EFBS | Eisenbahnfreunde Betzdorf e.V | DE | Revoked | |
| EFC | Eisenbahnfreunde Chemnitztal e.V | DE | In use | chemnitztalbahn.de |
| EFG | Eisenbahnfreunde Grenzland e.V. | DE | In use | eisenbahnfreunde-grenzland.de |
| EFK | Erich Fahl GmbH & CoKG | DE | In use | fahl-bau.de |
| EFM | European Fleet Management GmbH & Co.KG | DE | In use | efm-hh.de |
| EFR | Eisenbahnfreunde Rodachtalbahn e.V | DE | In use | rodachtalbahn.de |
| EFRN | Freunde der 212 001-2 e.V | DE | In use | baureihe212.de |
| EFRV | Euro Ferroviaria | IT | In use | |
| EFSA | EFSA SA | CH | In use | tracknet.ch |
| EFSFT | Eisenbahnfreunde Traditionsbahnbetriebswerk Staßfurt e.V. | DE | In use | eisenbahnfreunde-stassfurt.de |
| EFSK | Eisenbahnfreunde Treysa e.V. | DE | In use | eftreysa.de |
| EFW | EfW-Verkehrsgesellschaft mbH | DE | In use | efw-verkehrsgesellschaft.de |
| EFWFV | Eisenbahnfreunde Witten e.V. | DE | In use | ruhrtalbahn.de |
| EFWIN | EFW Infrastruktur GmbH | DE | In use | ef-wetterau.de |
| EFWIS | Eisenbahnfreunde Wismar e.V | DE | In use | lokschuppen-wismar.de |
| EFZ | Eisenbahnfreunde Zollernbahn e.V. | DE | In use | eisenbahnfreunde-zollernbahn.de |
| EGB | Erfurter Gleisbau GmbH | DE | In use | erfurter-gleisbau.de |
| EGMAR | Eredi Giuseppe Mercuri SpA | IT | In use | |
| EGN | EGENIE S.A.S | FR | In use | |
| EGOO | e.g.o.o. Eisenbahngesellschaft Ostfriesland-Oldenburg mbH | DE | In use | egoo-bahn.de |
| EGP | Eisenbahn-Gesellschaft Potsdam mbH | DE | In use | |
| EGS | E.G. Steele and Company Limited | UK | In use | egsteele.com |
| EH | ThyssenKrupp Steel Europe AG | DE | In use | thyssenkrupp-steel-europe.com |
| EHB | EHB Eisenbahn- und Hafenbetriebsgesellschaft Region Osnabrück mbH | DE | In use | stadtwerke-osnabrueck.de/ehb |
| EHD | ATLAS-Dresden/Eberle-Hald Handel und Dienstleistungen Dresden GmbH | DE | In use | eberle-hald.de |
| EHG | EH Güterverkehr GmbH | DE | Revoked | tks-eh.thyssenkrupp.com |
| EHGKG | Eisenbahn-Handels-Gesellschaft mbH & Co. KG | DE | In use | |
| EHH | Eisenbahnfreunde Hasetal Haselünne e.V. | DE | In use | eisenbahnfreunde-hasetal.net |
| EHM | Eberle-Hald Handel und Dienstleistungen Metzingen GmbH | DE | In use | eberle-hald.net |
| EHT | EH Trä | SE | In use | |
| EIB | Erfurter Bahn GmbH | DE | In use | erfurter-bahn.de |
| EICS | Eisenbahningenieur Christian Schmiedel | DE | In use | ei-cs.de |
| EILT | E.I.L.T GmbH | DE | In use | eilt-evu.de |
| EIS | Eiffage Infra-Süd GmbH | DE | In use | eiffage-infra.de/sued |
| EIVEL | Eichholz Eivel GmbH | DE | In use | strabag.de |
| EIW | Eiffage Infra West GmbH | DE | In use | eiffage-infra.de/west |
| EJS | EJS – Betrieb UG | DE | In use | ejs-betrieb.de |
| EKKI | EKKI Bahndienstleistungen | DE | In use | |
| EKKW | Europejskie Konsorcjum Kolejowe WAGON Sp. z o.o. | PL | In use | ekk-wagon.pl |
| EKO | ArcelorMittal Eisenhüttenstadt Transport GmbH | DE | In use | eko-trans.de |
| EKOBG | EKO Bulgaria | BG | In use | eko.bg |
| EKODT | Ing. Ladislav Arendáč - EKODAT | SK | In use | |
| EKOSK | ŽOS-EKO, s.r.o. | SK | In use | zos-eko.sk |
| EKSPR | EKSPER VAGON IŞLETMELERI A.Ş. | TR | In use | ekspervagon.com |
| ELAI | El`Achai - International Railways GmbH | CH | In use | el-achai.com.ch |
| ELBA | ELBA-Logistik GmbH | DE | In use | elba-logistik.de |
| ELBUD | ELBUDPROJEKT sp. z o. o. | PL | In use | |
| ELCJ | ELECTRIFICARE CFR - SUCURSALA CLUJ | RO | In use | electrificarecfr.ro |
| ELCMP | ELECTRO COMP SRL | RO | In use | |
| ELECT | ELECTREN, S.A. | ES | In use | electren.es |
| ELEM | NRC Infrapro Oy (Y-tunnus 2998506-9) | FI | In use | nrcgroup.fi |
| ELEN | ELEN - ing. De Rossi - Srl | IT | In use | eleningderossi.it |
| ELG | ELG GmbH | DE | In use | elg-essen.com |
| ELGL | ELECTRIFICARE CFR - SUCURSALA GALATI | RO | In use | bahn.com.ro |
| ELINE | ELEKTROLINE a.s. PRAHA | CZ | In use | elektroline.cz |
| ELIS | ELECTRIFICARE CFR - SUCURSALA IASI | RO | In use | |
| ELIXG | ELIXIR GROUP | RS | In use | elixirgroup.rs |
| ELK | Eurolokpool GmbH | DE | In use | |
| ELKO | ENEA Wytwarzanie S.A. | PL | In use | elko.com.pl |
| ELL | Eisenbahn Logistik Leipzig GmbH | DE | In use | |
| ELLCT | Ellecosta Srl | IT | In use | |
| ELLTC | Elletec Betriebs GmbH | AT | In use | elletec.at |
| ELMAS | REYSAŞ DEMİRYOLU TAŞIMACILIĞI A.Ş. | TR | In use | reysas.com |
| ELNOR | ELECNOR, SA | ES | In use | elecnor.es |
| ELOC | ELL Germany GmbH | DE | In use | ell.co.at |
| ELOP | PGE Górnictwo i Energetyka Konwencjonalna S.A. – Oddział Elektrownia Opole | PL | In use | elopole.pgegiek.pl |
| ELOR | ELECTROCENTRALE ORADEA SA | RO | In use | |
| ELP | European Loc Pool AG | CH | In use | europeanlocpool.com |
| ELPC | ELECTROPUTERE SA | RO | In use | electroputere.ro |
| ELPRO | ELPRO VIA s.r.o. | CZ | In use | elprovia.cz |
| ELRON | Eesti Liinirongid AS | EE | In use | elron.ee |
| ELS | ELS Eisenbahn Logistik und Service GmbH | DE | In use | |
| ELSID | ELSID SA | RO | In use | |
| ELTE | Elbatech AG | CH | In use | elbatech.com |
| ELTEL | ELTEL Networks Oy | FI | In use | eltelnetworks.com |
| ELTOR | Przedsiębiorstwo Wielobranżowe “EL-TOR 2” Antoni Perkowski | PL | In use | el-tor.pl |
| ELTRA | Eltra spol. s.r.o. | SK | In use | eltra.biz |
| ELV | Eisenbahn Vienenburg | DE | In use | |
| ELVZA | Elektrovod Žilina, a. s. | SK | In use | |
| ELZA | Elektromontážny závod Bratislava, a.s. | SK | In use | |
| ELZEL | Elektrizace železnic Praha a.s. | CZ | In use | |
| EMASZ | EUROMASZ Jacek Stryjakowski | PL | In use | pracebudowlane.com.pl |
| EMBB | Eisenbahnmuseum Bayrischer Bahnhof zu Leipzig e.V. | DE | In use | dampfbahnmuseum.de |
| EMD | IG Bw Dieringhausen e.V. | DE | In use | ig-bw-dieringhausen.de |
| EMFES | ENAJENACIÓN DE MATERIALES FERROVIARIOS S.A.U. | ES | In use | emfesa.es |
| EMG | Erich Müllet | DE | In use | gleisbau-mueller.de |
| EMH | EXPLOATAREA MINIERA HARGHITA SA | RO | In use | |
| EMN | Transter Kornwestheim GmbH | DE | In use | |
| EMR | EuroMaint Rail AB | SE | In use | euromaint.se |
| EMS | KG EMS Gleisbau GmbH & Co. | DE | In use | ems-gleisbau.de |
| EMSCH | EMS-CHEMIE AG | CH | In use | ems-group.com |
| EMSV | EBPOMETAЛ CTPOЙ-B OOД | BG | In use | emstroi.bg |
| EMTE | EMTE SLU | ES | Revoked | comsaemte.com |
| ENAG | Erms-Neckar-Bahn AG | DE | In use | erms-neckar-bahn.de |
| ENAS | Enaspol a. s. | CZ | In use | enaspol.cz |
| ENG | Eisenbahnfreunde Niederrhein/Grenzland e.v | DE | In use | eng-ev.de |
| ENGEM | ENGEMA nv | BE | In use | engema.be |
| ENGIE | Fabricom s.a. | BE | In use | engie-fabricom.com |
| ENJ | Engelsberg Norbergs Järnvägshistoriska förening | SE | In use | enj.se |
| ENNA | ENNA TRANSPORT d.o.o. za prijevoz tereta | HR | In use | transport.enna.hr |
| ENORA | ENORAIL | FR | In use | |
| ENPUR | ENPURA sp. z o.o. | PL | In use | |
| ENR | Egypt National Railways | EG | In use | -- |
| ENRA | Energy Rail GmbH | DE | In use | energy-rail.de |
| ENS | Rotkaeppchen-Mumm Sektkellereien GmbH | DE | In use | |
| ENT | Banedanmark | DK | In use | bane.dk |
| ENTR | Euronaft Trzebinia Sp. Z o.o. | PL | In use | euronaft-trzebinia.pl |
| ENTSK | Europe Night Trains Slovakia s. r. o. | SK | In use | ent-rail.com |
| ENV | ENVIRAL, a. s. | SK | In use | enviral.sk |
| ENVI | ENVILOC GmbH | DE | In use | enviloc.eu |
| ENWOY | Enwoy Gas, s.r.o. | SK | In use | |
| EP | EUROPORTE 2 | FR | In use | |
| EPC | Europorte Channel SAS | FR | In use | europorte.com |
| EPCD | EP Cargo Deutschland GmbH | DE | In use | epcargo.eu |
| EPCI | EP Cargo a.s. | CZ | In use | epcargo.cz |
| EPCIN | EP Cargo Invest a.s. | CZ | In use | epcargo.cz |
| EPCVJ | EPCVJ VULCAN | RO | In use | |
| EPF | Europorte France | FR | In use | europorte.com |
| EPH | Erdbewegung Paul Herzog GmbH | AT | In use | |
| EPMFD | EP Engine Provider GmbH | DE | In use | ferrostaal.com |
| EPO | EPORE Sp. z o.o. | PL | In use | epo.com.pl |
| EPOOL | EUROPOOL GmbH | DE | In use | |
| EPP | ELIXIR PRAHOVO DOO PRAHOVO | RS | In use | ihp.co.rs |
| EPR | E-P RAIL SRL | RO | In use | e-prail.ro |
| EPSK | EPS RB KOLUBARA d.o.o LAZAREVAC | RS | In use | rbkolubara.co.rs |
| ER | Elektriraudtee | EE | Blocked | |
| ERAG | Eberhard Recycling AG | CH | In use | eberhard.ch |
| ERAIL | Eurailpool GmbH | DE | In use | eurailpool.com |
| ERB | eurobahn GmbH & Co. KG | DE | In use | eurobahn.de |
| ERC | European Railway Company Deutschland GmbH | DE | In use | ercd.de |
| ERD | Eiffage Infra-Rail GmbH | DE | In use | eiffaqe-infra.de/rail |
| ERDPL | ERIDON sp. z o.o. | PL | In use | eridon.pl |
| ERE | OPERE | FR | In use | ere-lgv-bpl.com |
| ERF | Eiffage Rail | FR | In use | eiffagerail.fr/fr/home-page |
| ERH | EUROGATE RAIL HUNGARY Szolgaltato Zrt. | HU | In use | eurogate-rail.hu |
| ERIXX | erixx GmbH | DE | In use | erixx.de |
| ERMD | ERMEWA SA | DE | In use | ermewa.com |
| ERMI | ERMEWA IBERICA | ES | In use | |
| ERMW | ERMEWA SA, Geneva branch | CH | In use | ermewa.ch |
| ERNEF | ERNEFA GmbH | DE | In use | |
| ERPL | EVERRAIL sp. z o.o. | PL | In use | everrai.pl |
| ERR | ERR European Rail Rent GmbH | DE | In use | railrent.com |
| ERS | ERS Railways | NL | In use | ersrail.nl |
| ERSA | ERMEWA-SAS | FR | In use | ermewa.fr |
| ERSF | Eiffage Rail Services | FR | In use | |
| ERSFR | EURAILSCOUT FRANCE | FR | In use | eurailscout-france.fr |
| ERX | EuroRailExpress | NL | In use | |
| ES | “EUROTERMINAL SŁAWKÓW” sp. z o.o | PL | In use | euroterminal.pl |
| ESG | Eisenbahn- und Sonderwagen-Betriebsgesellschaft mbH | DE | In use | blue-star-train.de |
| ESGBI | Eisenbahn-Service-Gesellschaft mbH | DE | In use | |
| ESGER | ErailS GmbH | DE | In use | |
| ESIN | ESIN S.r.l. | IT | In use | |
| ESLNL | ESL GmbH Eisenbahnverkehrsunternehmen | DE | In use | eisenbahnservice.com |
| ESRAY | ESRAY MAKINA OTOMOTIV SANAYI INŞAAT SANAYI VE TICARET ANONIM ŞIRKE | TR | In use | esray.com.tr |
| ESS | Ernst Schauffele Schienenverkehrs GmbH & Co KG | DE | In use | eisenbahnverkehr.de |
| ESSO | Esso Petroleum Co Ltd | UK | In use | exxonmobil.co.uk |
| ESW | TAURON Wytwarzanie S.A. – Oddział Elektrownia Stalowa Wola w Stalowej Woli | PL | In use | esw.pl |
| ESXXI | EXCAVA SXXI S.L.U. | ES | In use | excava21.com |
| ET | Eurotunnel | UK | Blocked | |
| ETB | Eisenbahn Technik Betrieb GmbH & Co KG | DE | In use | |
| ETE | European Trans Energy GmbH | AT | In use | europten.com |
| ETF | ETF | FR | In use | etf.fr |
| ETFLU | Eurovia Travaux Ferroviaires Luxembourg | LU | In use | |
| ETG | ETG Eisenbahntechnik-Gesellschaft mbH | DE | In use | |
| ETHB | EuroTHURBO | DE | In use | thurbo.ch |
| ETIAS | Eti Lojistik Demiryolu Tasimaciligi Ve Isletmeciligi Vagon Bakim Onarim Iml.San.Tic. A.S. | TR | In use | yildirimholding.com |
| ETIMI | ETI MADEN İŞLETMELERİ GENEL MÜDÜRLÜĞÜ | TR | In use | etimaden.gov.tr |
| ETL | Eisenbahn -Tradition e.V. | DE | In use | eisenbahn-tradition.de |
| ETMF | ETMF | FR | In use | |
| ETP | EUROTEHNIC TOTAL PROIECT SRL | RO | In use | |
| ETR | EUROTRANS sp. z o.o. | PL | In use | |
| EU | Eurostar (UK) Limited | UK | Blocked | eurostar.com |
| EUC | EURO CONSTRUCT SA | RO | In use | |
| EUCOM | EUROCOM Automatizálási és Vasúttechnikai Zrt. | HU | In use | eurotraction.hu |
| EUFER | Eurofer Equipment S.r.l. | IT | In use | eurofer.net |
| EURAI | EURORAIL S.r.l. | IT | In use | |
| EURL | EURORAIL NV/SA | BE | In use | eurorail.eu |
| EURO | Euro Express Sonderzüge GmbH & Co KG | DE | In use | euro-express.eu |
| EUROC | EUROCONSTRUCT TRADING 98 SRL | RO | In use | |
| EUROW | EUROW-Waggon GmbH | DE | In use | |
| EUROY | Eurowagon Demiryolu Tic.Ltd.Şti. | TR | In use | |
| EURSW | Euroswitch AG | CH | Revoked | euroswitch.info |
| EUSCT | Eurailscout | NL | In use | eurailscout.com |
| EUSKO | Eusko Trenbideak - Ferrocarriles Vascos S.A. | ES | In use | euskotren.eus |
| EUWAG | EUROWAGON SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ | PL | In use | euro-wagon.com |
| EV | Eurovapor | CH | In use | eurovapor.ch |
| EVA | Ekolsunds Åkeri & Verkstads AB | SE | In use | |
| EVB | Eisenbahnen und Verkehrsbetriebe Elbe-Weser GmbH | DE | In use | evb-elbe-weser.de |
| EVBG | Eisenbahn Verkehr und Besitz GmbH | DE | In use | rheingold-zug.com |
| EVG | Eifelbahn Verkehrsgesellschaft mbH | DE | In use | zugtouren.de |
| EVM | EVM Rail S.r.l. | IT | In use | evmrail.it |
| EVR | Aktsiaselts Eesti Raudtee | EE | Blocked | evr.ee |
| EVRE | EVR Exspress | EE | Blocked | evrekspress.ee |
| EVRO | "Евроинженеринг" ЕООД | BG | In use | |
| EVS | VTG Rail Europe | FR | Revoked | |
| EVTR | Evrometal OOD / Еврометал ООД | BG | In use | |
| EVULW | LEONHARD WEISS GmbH & Co. KG | DE | In use | leonhard-weiss.de |
| EW | Erik Walter GmbH Co KG | DE | In use | erik-walter.de |
| EWEX | E-W Express, s.r.o. | SK | In use | ewex.sk |
| EWG | EWG Rail Pic. | HU | In use | |
| EWI | Firma Handlowo-Usługowa "Ewimex" | PL | In use | |
| EWL | EWL GmbH East West Logistics | DE | In use | |
| EWOOD | Ecco Wood sp. z o.o. | PL | In use | ecco-wood.eu |
| EWOW | AKRENT sp. z o. o. | PL | In use | |
| EWS | English Welsh and Scottish Railway International Limited | UK | In use | ews-railway.co.uk |
| EXCH | Verein Extrazug CH | CH | In use | extrazug.ch |
| EXER | Stockholm Exergi AB | SE | In use | stockholmexergi.se |
| EXFO | EXPRESS FORWARDING SRL | RO | In use | expressrail.ro |
| EXKOL | EXKOL Przedsiębiorstwo Budownictwa Kolejowego i Usług Handlowych sp. j. Wojciech Szawłowski i S-ka | PL | In use | exkol.pl |
| EXPR | Express Service LTD. | BG | In use | exservice.biz |
| EXPUR | EXPUR S.A. | RO | In use | |
| EXRA | Express Wagons, a.s. | SK | In use | expresswagons.sk |
| EXSK | Express Group, a.s. | SK | In use | expressgroup.sk |
| EXTRA | EXTRAIL SP. Z O.O. | PL | Revoked | extrail.com.pl |
| EYMI | E Y M Instalaciones s.a. | ES | In use | ohl.es |
| EZK | Elektrizácia železníc Kysak, a.s. | SK | In use | |
| EZMDJ | ELIXIR ZORKA MINERALNA DUBROVINA d.o.o. | RS | In use | elixirzorka.co.rs |
| FA | AMEDEE FORNONI TRAVAUX FERROVIAIRES | FR | In use | fornoni-amedee.fr |
| FABN | Ferrovia Alifana e Benevento Napoli s.r.l. | IT | Revoked | metrocampanianordest.it |
| FAEG | Falkenberger Eisenbahngesellschaft mbH | DE | In use | |
| FAG | Frutiger AG Untertagbau | CH | In use | frutiger.com |
| FAIR | Stichting Fairtrains | NL | In use | fairtrains.nl |
| FAL | Ferrovie Appulo Lucane S.R.L. | IT | In use | ferrivieappulolucane.it |
| FALK | SONATA LOGISTICS GmbH | DE | In use | sonata-logistics.com |
| FANDA | František Štraub | CZ | In use | |
| FART | Ferrovie Autolinee Regionali Ticinesi | CH | In use | centovalli.ch |
| FAS | Società Unica Abruzzese di Trasporto TUA S.p.A. | IT | Revoked | tuabruzzo.it |
| FATOC | ATELIERS DOCCITANIE | FR | In use | |
| FATRA | Fatra, a.s. | CZ | In use | fatra.cz |
| FAUR | FAUR SA | RO | In use | |
| FB | Forchbahn | CH | In use | forchbahn.ch |
| FBF | Frenzel-Bau GmbH&Co. KG | DE | In use | frenzel-bau.de |
| FBV | Suburbano FBV | IT | Blocked | |
| FC | Ferrovia della Calabria | IT | Blocked | ferroviedellacalabria.it |
| FCARE | VR Kunnossapito Oy | FI | In use | vrfleetcare.com |
| FCC | First Capital Connect | UK | In use | |
| FCCCO | FCC-Construccion, S.A | ES | In use | fcc.es |
| FCCIN | FCC SERVICIOS INDUSTRIALES Y ENERGÉTICOS, S.A. | ES | In use | fccindustrial.es |
| FCE | Ferrovia Circumetnea | IT | In use | circumetnea.it |
| FCU | Umbria Mobilità Esercizio s.r.l. | IT | In use | umbriamobilita.it |
| FD | Friedrich Duensing GmbH | DE | In use | duensing.de |
| FDC | Ferrovie della Calabria S.r.l. | IT | In use | ferroviedellacalabria.it |
| FDEV | Faszination Dampf e.V. | DE | In use | faszination-dampf.de |
| FDF | Finnish Defence Force | FI | In use | mil.fi |
| FEBEX | FEBEX | CH | In use | |
| FECZ | Felbermayr Transport- und Hebetechnik, spol. S r.o. | CZ | In use | |
| FEG | Freiberger Eisenbahngesellschaft mbH | DE | In use | freiberger-eisenbahn.de |
| FEGER | Helmut Feger GmbH | DE | In use | fegergmbh.de |
| FEIDT | Betons FEIDT S.A. | LU | In use | feidt.lu |
| FELB | Felbermayr Transport- und Hebetechnik GmbH & Co KG | AT | In use | felbermayr.cc |
| FEP | Fundacja Era Parowozów | PL | In use | eraparowozow.org.pl |
| FEPL | Felbermayr Polska Sp. z o.o. | PL | In use | felbermayr.cc |
| FER | Ferrovie Emilia Romagna | IT | In use | fer-online.it |
| FERCO | FER80 SRL | IT | In use | fer80.it |
| FERE | FEREST LOGISTICS SRL | RO | In use | ferest-logistics.ro |
| FERFI | Fennia Rail Oy | FI | In use | fenniarail.fi |
| FERO | FEROCARGO EUROTRANS SA | RO | In use | |
| FEROV | FEROVERGNE | FR | In use | qroupecombronde.com |
| FERP | FEROCO S.A. | PL | In use | feroco.pl |
| FERRO | FERROVIAL AGROMAN, S.A. | ES | In use | ferrovial.com |
| FERRU | FERRUM S.A. | PL | In use | ferrum.com.pl |
| FERS | Fersalento s.r.l. | IT | In use | |
| FERSP | Fersped d.d. | SI | In use | fersped.si |
| FERST | Förderverein Eisenbahn Rinteln - Stadthagen e.V. | DE | In use | der-schaumburger-ferst.de |
| FERSU | FERMECCANICA SUD S.r.l. | IT | In use | fermeccanicasud.it |
| FERT | Fertilog Oy | FI | In use | fertilog.fi/fi |
| FESK | FELBERMAYR SLOVAKIA, s.r.o. | SK | In use | |
| FETB | Förderverein Eistalbahn e.V. | DE | In use | foerderverein-eistalbahn.de |
| FEVE | Ferrocarriles de Via Estrecha | ES | Blocked | feve.es |
| FEVG | Friesoyther Eisenbahngesellschaft mbH | DE | In use | friesoyther-eisenbahngesellschaft.de |
| FEW | FEW Blankenburg GmbH | DE | In use | |
| FFAG | Furrer+Frey AG | CH | In use | furrerfrey.ch |
| FFDDE | Furrer + Frey Deutschland GmbH | DE | Revoked | furrerfrey.de |
| FFR | F&F Rail d.o.o. | HR | In use | |
| FFS | Ferrovia Federali Svizzeri | CH | In use | ffs.ch |
| FFWD | FFWD Rail BV | NL | In use | ffwdrail.com |
| FG | Ferrovia del Gargano | IT | In use | ferroviedelgargano.it |
| FGC | FERROCARRILS DE LA GENERALITAT DE CATALUNYA | ES | In use | fgc.cat |
| FGG | Feldschlösschen Getränke AG | CH | In use | feldschloesschen.com |
| FGL | FAGIOLI S.p.A | IT | In use | fagioli.com |
| FGV | Ferrocarrils de la Generalitat de Valencia | ES | Blocked | cop.gva.es/fgv/ |
| FGW | First Great Western | UK | Blocked | firstgreatwestern.co.uk |
| FHB | Feldhaus Bergbau GmbH & Co. KG | DE | In use | feldhaus.com |
| FIA | FERRIVIA | FR | In use | ferrivia.fr |
| FINF | Financial Found a.s. | CZ | In use | |
| FINNG | FGG Finngas GmbH sivuliike Suomessa | FI | In use | finngas.fi |
| FISEK | FİŞEKÇİOĞLU DEMIR ÇELIK SAN.VE TIC A.Ş. | TR | In use | fisekciogludemir.com |
| FJT | Firma JT Järnvägsteknik | SE | In use | |
| FKA | Fahrzeugkompetenzzentrum Augsburg GmbH (FKA) | DE | In use | fka-augsburg.de |
| FKGJK | MÁV FKG Felépítménykarbantartó és Gépjavító Kft. | HU | In use | mav-fkg.internettudakozo.hu |
| FKH | Franz Kaminski Waggonbau GmbH | DE | In use | kaminski-hameln.de |
| FL | Freightliner | UK | Blocked | freightliner.co.uk |
| FLAIR | Fürstlich Liechtensteinische Eisenbahn-Romantik Stiftung | AT | In use | eisenbahn-nostalgie-flair.li |
| FLCGK | Pfeifer & Langen Glinojeck S.A. | PL | In use | diamant.pl |
| FLEX | Flex Bahndienstleistungen GmbH | DE | In use | flex-bahndienstleistungen.de |
| FLINT | FLOAREA INTERNATIONAL SRL | RO | In use | |
| FLIX | Flix Train GmbH | DE | In use | flixtrain.de |
| FLO | Florin AG | CH | In use | |
| FLOBA | Florianer Bahn Forschungs- und Errichtungsgesellschaft mbH | AT | In use | florianerbahn.com |
| FLOYD | FLOYD ZRt. | HU | Revoked | floyd.hu |
| FLP | Ferrovie Luganesi (Ferrovia Lugano - Ponte Tresa) | CH | In use | flpsa.ch |
| FLYT | Flytoget AS | NO | Revoked | flytoget.no |
| FME | Fränkische Museums-Eisenbahn e. V. Nürnberg | DE | In use | fme-ev.de |
| FMR | FuoriMuro Servizi Portuali e Ferroviari S.r.l. | IT | In use | fuorimuro.it |
| FN | FERROVIENORD S.p.A. | IT | In use | ferrovienord.it |
| FNM | Ferrovie Nord Milano Esercizio S.p.A. | IT | Revoked | ferrovienord.it |
| FNW | First North Western | UK | Blocked | firstnorthwestern.co.uk |
| FOD | Spolek „Frýdlantské okresní dráhy" | CZ | In use | |
| FODPS | Fundacja Ochrony Dziedzictwa Przemysłowego Śląska | PL | In use | muzeumtechniki.pl |
| FORII | Föreningen Förstlingen II | SE | In use | forstlingen.com |
| FORMS | FORMS Mariusz Koch | PL | In use | forms.com.pl |
| FOSF | FOSFAN S.A. | PL | In use | fosfan.pl |
| FOSFA | Fosfa akciová společnost | CZ | In use | |
| FOX | FOXrail Zrt. | HU | In use | foxrail.hu |
| FOXFI | FoxRail Logistics Oy | FI | In use | frlogistics.fi |
| FPC | JSC FEDERAL PASSENGER COMPANY | RU | In use | |
| FPL | Freightliner PL Sp. z o.o. | PL | In use | freightliner.pl |
| FR | Fragonset Railways | UK | Blocked | fragonset.co.uk |
| FRA | Ferroviaire Rhône Alpes | FR | In use | |
| FRANK | Beutlhauser-Frank GmbH | DE | In use | beutlhauser-Frank.de |
| FRC | FRASCA | FR | In use | frasca.fr |
| FRETU | Fretus AG | CH | In use | fretus.ch |
| FRG | Fergrupo - Construções e Técnicas Ferroriárias S.A. | PT | In use | fergrupo.pt |
| FRIE | Hanns Friedrich OHG | DE | In use | |
| FRITZ | FRITZE & Co. Eisenbahn und Tiefbau GmbH & Co. KG | DE | In use | fritze-eisenbahnbau.de |
| FRL | Fan rail s.r.o. | CZ | In use | |
| FRM | FERROMET a.s. | CZ | In use | steel-holding.cz |
| FRN | FER RENT S.r.l. | IT | In use | |
| FRRWY | Ferrovial Railway, S.A. | ES | In use | ferrovial.com |
| FRS | Feldbinder Rail Services GmbH | DE | In use | |
| FRST | Frutiger AG Spezialtiefbau | CH | In use | frutiger.com |
| FRT | FERROTRACT | FR | In use | ferrotract.fr |
| FRTS | Entreprise P. FOURCHARD & R. RENARD | FR | In use | |
| FRUEH | Früh Ingenierbau GmbH & Co. KG | DE | Revoked | fruehib.de |
| FRV | Ferrovias e Construções S.A. | PT | Revoked | ferrovias.pt |
| FRVAS | FERROVIAS ASTUR, S.A. | ES | In use | ferroviasastur.com |
| FSE | Ferrovie del Sud-Est | IT | In use | |
| FSI | FSI Logistik GmbH | DE | In use | |
| FSKG | Friedrich Scharr KG | DE | In use | scharr.de |
| FSNCF | SNCF-C32 SAS | FR | In use | |
| FSP | FERSPED CARGO SA | RO | In use | |
| FSVJ | Föreningen Sörmlands Veteranjärnväg | SE | In use | fsvj.se |
| FT | Ferrotramviaria | IT | In use | ferrovienordbarese.it |
| FTG | Fertagus | PT | In use | fertagus.pt |
| FTM | Ferrovia Trento-Malé | IT | Blocked | fertm.it |
| FUC | Società Ferrovie Udine Cividale | IT | In use | ferrovieudinecividale.it |
| FUCHS | Fuchs Europe Schmierstoffe GmbH | DE | In use | |
| FUNSV | FUNIVIE S.p.A. | IT | In use | funiviesv.it |
| FVCF | Francesco Ventura Costruzioni Ferrovirie S.r.l. | IT | In use | fventura.it |
| FVE | Farge-Vegesacker Eisenbahn | DE | In use | connex-gruppe.de |
| FVILL | Fehérvill-ám Kft. | HU | In use | |
| FVJ | Föreningen Veteranjärnvägen | SE | In use | veteranjarnvagen.se |
| FVMSB | Förderverein Mainschleifenbahn e.V | DE | In use | mainschleifenbahn.de |
| FW | FRANCE WAGONS | FR | In use | |
| FWG | Finwagon Oy | FI | In use | rp-hitsaus.fi |
| FWGS | Fels Werke GmbH Goslar | DE | In use | |
| FWGSA | FABRYKA WAGONÓW GNIEWCZYNA s.a. | PL | In use | gniewczyna.pl |
| FWK | Fahrzeugwerke Karsdorf GmbH & Co. KG | DE | In use | erfurter-bahnservice.de |
| FZCRA | ZAHAR CORABIA SA | RO | In use | |
| GAAL | Gaal S.p.A. | IT | In use | sitfa.net |
| GABW | Go-Ahead Baden-Württemberg GmbH | DE | In use | go-ahead-bahn.de |
| GABY | Go-Ahead Bayenr GmbH | DE | In use | go-ahead-bahn.de/go-ahead-bayern |
| GADFT | GADEFT | FR | In use | |
| GAFLT | K+M Fahrleitungstechnik GmbH | DE | In use | kuma-fl.de |
| GAIA | GAIAOSE S.A. | EL | In use | gaiaose.gr |
| GAPRO | GA PRO-CO CHEMICALS SA | RO | In use | |
| GATXA | GATX Rail Austria GmbH | AT | In use | gatx.eu |
| GATXD | GATX Rail Germany GmbH | DE | In use | |
| GATXF | GATX RAIL FRANCE SAS | FR | In use | |
| GATXO | Ing. Alica Ovčiariková A.O., s.r.o. | SK | In use | |
| GATXP | GATX Rail Poland Sp. z o.o. | PL | In use | gatx.eu |
| GAVD | Go-Ahead Verkehrsgesellschaft Deutschland GmbH | DE | In use | go-ahead-bahn.de |
| GBA | Gleisbau Weimar GmbH | DE | In use | gleisbau-weimar.de |
| GBBJ | Grängesbergsbanornas Järnvägsmuseum | SE | In use | |
| GBC | GeBaCo GmbH | DE | In use | gebaco.de |
| GBLos | Geschw Balter Bauunternehmung GmbH | DE | In use | balter-bau.de |
| GBM | GBM Wiebe Gleisbaumaschiennen GmbH | DE | In use | gbm.wiebe.de |
| GBMV | Gleisbau Meckleburg-Vorpommern GmbH | DE | In use | |
| GBRF | GB Railfreight Limited | UK | In use | gbrailfreight.com |
| GBS | Gleisbau Sabrodt GmbH | DE | In use | heringinternational.com |
| GBW | Gleisbau-Busching-Wagner GmbH | DE | In use | gbw-busching.de |
| GBXEU | GREENBRIER Leasing Europe BV | NL | In use | greenbrier-europe.com |
| GC | Green Cargo AB | SE | In use | greencargo.com |
| GCA | Grampetcargo Austria | AT | In use | |
| GCAWA | GCA WAGONS | FR | In use | |
| GCF | G.C.F. Generale Costruzioni Ferroviarie | IT | In use | gcf.it |
| GCPV | Cementos Portland Valderrivas, S.A. | ES | In use | valderrivas.es |
| GCRAL | Transportes Hermanos Cortés, S.L | ES | In use | grupo-cortes.es |
| GDJ | Museiföreningen Gefle-Dala Jernväg | SE | In use | mfgdj.se |
| GE | Gepard Express, SE | CZ | In use | gepard.com |
| GEFCO | GEFCO S.A. | FR | In use | gefco.net |
| GEFER | GEFER S.p.A. | IT | In use | gefer.it |
| GEFSK | GEFCO RAIL SLOVAKIA s.r.o. | SK | In use | gefco.net |
| GEISM | GEISMAR SAS | FR | In use | geismar.com |
| GEN | GENIFER | FR | In use | |
| GEO | GEOSINTESI S.p.A. | IT | In use | geosintesi.com |
| GEOBB | GEOMONTA-HARMANEC | SK | In use | geomonta.sk |
| GER | First Great Eastern | UK | Blocked | ger.co.uk |
| GERA | Bahnbetrieb Gera GmbH | DE | In use | |
| GERS | GE Capital Rail Services GmbH & Co.KG | DE | In use | |
| GES | Gesellschaft zur Erhaltung von Schienenfahrzeugen Stuttgart e.V. | DE | In use | ges-ev.de |
| GESG | G&G Növényvédelmi és Kereskedelmi Kft. | HU | In use | gesgkft.hu |
| GET | Georgsmariënhütte Eisenbahn und Transport | DE | Revoked | -- |
| GETR | GERHÁT TRAIN s.r.o. | CZ | In use | |
| GETRA | GETRA a.s. | SK | In use | getra.sk |
| GETUK | General Electric Transportation Systems UK LTD | UK | In use | getransportation.com |
| GEW | Geraer Eisenbahnwelten e.V. | DE | In use | geraer-eisenbahnwelten.de |
| GFD | Gleisbau Füllberg GmbH | DE | In use | fuellberg.de |
| GFE | GfE Gesellschaft für Eisenbahnbetrieb mbH | DE | In use | |
| GFF | GfF Gesellschaft f. Fahrzeugtechnik mbH | DE | In use | |
| GFMH | GFM Historique (GFMH) | CH | In use | gfm-historique.ch |
| GFR | GRUP FEROVIAR ROMAN S.A. | RO | In use | gfr.ro |
| GFW | GLIWICKA FABRYKA WAGONÓW HOLDING SPÓŁKA AKCYJNA | PL | In use | gfwsa.com.pl |
| GGB | Gornergrat-Monte Rosa-Bahnenbahn | CH | In use | ggb.ch |
| GGRB | Gleis-Genossenschaft Ristet-Bergermoos | CH | In use | |
| GGT | Görlitzer Gleis- und Tiefbau GmbH | DE | In use | ggt-gmbh.de |
| GHG | Gelsenkirchener Logistik-, Hafen- und Servicegesellschaft mbH | DE | In use | hafen-ge.de |
| GHJ | Gotlands Hesselby Jernväg | SE | In use | gotlandstaget.se |
| GHL | Grinsty Holdings Limited | UK | In use | |
| GHS | G. Hinteregger & Söhne Baugesellschaft mbH | AT | In use | hinteregger.co.at |
| GICU | GICU Jarosław Iwaniuk | PL | In use | |
| GIF | Gestor de Infraestructuras Ferroviarias | ES | Blocked | gif.es |
| GJT | Gävle Järnvägsteknik AB | SE | In use | gjt.se |
| GJVB | NSB Gjøvikbanen AS | NO | In use | nsb.no |
| GJW | GJW Praha spol. s r.o. | CZ | In use | |
| GKB | Graz-Köflacher Eisenbahn | AT | In use | gkb.at |
| GL | GMEINDER LOKOMOTIVEN GmbH | DE | In use | gmeinder-lokomotiven.de |
| GLBF | GLOBALFER S.P.A. | IT | In use | globalferspa.it |
| GLEIS | G&L Bau R. Brachendorf GmbH | DE | In use | gleisbau-brachtendorf.de |
| GLFIT | Gleisfrei Srl | IT | In use | gleisfrei.com |
| GLG | Gmeinder Lokomotivenfabrik GmbH | DE | Revoked | gmeinder.de |
| GLOBA | COSTRUZIONI GLOBALI | IT | In use | |
| GLR | Truck to Train Service GmbH | AT | In use | trucktotrain.at |
| GLRB | GEBR.LUTZ Bauunternehmung GmbH + Co. KG | DE | In use | gebr-lutz.de |
| GLRR | Gerhard Lang Recycling GmbH | DE | In use | lang-recycling.de |
| GLS | GLS Bau und Montagne GmbH | AT | In use | gls.at |
| GLV | Gesellschaft für Logistik und Vegetationsdienste mbH | DE | In use | |
| GMAAR | Genossenschaft Migros Aare | CH | In use | migros.ch |
| GMAOS | GRUPO MARIÑO OBRAS Y SERVICIOS | ES | In use | |
| GMB | Flytoget AS | NO | In use | flytoget.no |
| GMBB | GMB GmbH | DE | In use | gmbgmbh.de |
| GMF | GESTION DE MAQUINARIA FERROVIARIA | ES | In use | comsaemte.com |
| GMG | GMG Gesellschaft f. masch. Gleisbau mbH & Co. KG | DE | In use | xaver-pittrich.de |
| GMMM | Grand Moulin Maurel | FR | In use | |
| GMOS | Migros Ostschweiz | CH | In use | migros-ostschweiz.ch |
| GNER | Great North Eastern Railway | UK | Blocked | gner.co.uk |
| GNL | GLOBAL NEOLOGISTICS DOO | RS | In use | globalneologistics.com |
| GNP | Геоактив Некст Проджекст ООД | BG | In use | |
| GNRS | Gemernákup, a.s. | SK | In use | |
| GO | CGOSTEC GmbH | DE | In use | gostec.de |
| GODBN | Gleis- und Oberbau- Dienstleistungen | DE | In use | god-bad-nauheim.de |
| GOLD | Ferroslužby, s.r.o. | CZ | In use | |
| GORKA | GÓRKA CEMENT Sp. z o.o | PL | In use | gorka.com.pl |
| GORTR | GÓR-TOR Maciej Górniak | PL | In use | |
| GOSA | PRIVREDNO DRUSTVO GOSA FABRIKA SlNSKIH VOZILA, PUTNlCKIH I SPECIJALNIH VAGONA DOO SMEDEREVSKA PALANKA | RS | In use | |
| GOTRA | GO TRANSPORT SERVICIOS 2018 S.A. | ES | In use | gotransport.es |
| GP | GRAMPET SA | RO | In use | grampet.ro |
| GPMB | Grand Port Maritime de Bordeaux | FR | In use | |
| GPMT | GP Papenburg Maschinentechnik GmbH | DE | In use | gp.ag |
| GPRC | GP RAIL CARGO SA | RO | In use | |
| GR | Chemins de fer de Géorgie | GE | In use | railway.ge |
| GRAB | Grenland Rail AB | SE | In use | grenlandrail.com |
| GRAF | Grafschafter Modell- und Eisenbahn-Club e.V. | DE | In use | graf-mec.de |
| GRAG | Ing. Greuter AG | CH | In use | greuterag.ch |
| GRAIL | Gruschina Transport und Vermietungs GmbH | AT | In use | gruschina.at |
| GRAN | Bauunternehmung Granit GmbH | AT | In use | granit-bau.at |
| GRAS | Grenland rail AS | NO | In use | grenlandrail.no |
| GRAU | Grauer GbR | DE | In use | grauer-baumaschinen.de |
| GRCR | Gebr. Reinhard GmbH & Co. KG | DE | In use | reinhard-stahl.de |
| GRH | Grosso Holding sp. z o. o. | PL | In use | |
| GRIRO | GRIRO SA | RO | In use | |
| GRK | GRK Rail Oy | FI | In use | grk.fi |
| GRKS | Georg Reisse Bauunternehmung GmbH & Co KG | DE | In use | georg-reisse.de |
| GROET | Grötz GmbH & Co KG Bauunternehmung | DE | In use | groetz.de |
| GRSE | Granit Srevices | FR | In use | |
| GSCH | Geiger + Schüle Bau GmbH & Co. KG | DE | In use | gsbau.eu |
| GSTR | Gastrade S.A. / Газтрейд АД | BG | In use | |
| GSW | GSW Gleisbau und Schweißtechnik GmbH u. Co. KG | DE | In use | gsw-gleisbau.de |
| GTB | Gailtalbahn Betriebs GmbH | AT | In use | gaiItalbahn.at |
| GTC | GLOBAL TRANSPORT COMPANY Sp. z o.o. | PL | In use | |
| GTE | Geraer Traditionseisenbahn UG | DE | In use | traditionseisenbahn-gera.de |
| GTF | GRUP TRANSPORT FEROVIAR S.A. | RO | In use | |
| GTR | Goldschmidt Thermit Railservice (Österreich) GmbH | AT | In use | gt-railservice.com |
| GTRAB | Gällivare Traktor AB | SE | In use | |
| GTRCK | Go Track Oü | EE | In use | gotrack.ee |
| GTS | Gesellschaft für Gleistechnik Süd GmbH | DE | In use | |
| GTSCH | GTS RAIL SAGL in liquidazione | CH | Revoked | |
| GTSL | General Transport Service S.p.A. | IT | In use | gtslogistic.com |
| GTSR | GTS Rail S.p.A. | IT | In use | gtsrail.com |
| GTT | Gruppo Torinese Trasporti | IT | Blocked | comune.torino.it/gtt/ |
| GTV | GTV Gleis- und Tiefbau Verwaltungsgesellschaft mbH | DE | In use | gtv-mbh.eu |
| GUNSE | GÜNSEL GLOBAL LOJ. IÇ VE DIŞ. TIC. LTD. ŞTI | TR | In use | gunselglobal.com |
| GUT | GUT Gleisunterhaltungstechnik GmbH | DE | In use | |
| GV | Lokalbahn Gmunden-Vorchdorf | AT | Revoked | stern-verkehr.at |
| GVB | Glaverbel Czech a.s., člen skupiny Glaverbel | CZ | In use | |
| GVBNO | Gamle Vossebanen | NO | In use | njk.no/gvb |
| GVG | Georg Verkehrsorganisation GmbH | DE | In use | berlin-night-express.com |
| GWJHT | GW JIHOTRANS a.s. | CZ | In use | jihotrans.cz |
| GWTR | GW Train Regio a.s. | CZ | In use | gwtr.cz |
| GX | Gatwick Express | UK | Blocked | gatwickexpress.co.uk |
| GYC | GYSEV Cargo Zrt | HU | In use | gysev.hu |
| GYO | AGRUPACIÓN GUINOVART OBRAS Y SERVICIOS HISPANIA, S.A. | ES | In use | ohl.es |
| GYPS | GYPSTREND s.r.o. | CZ | In use | |
| GYSEV | Györ-Sopron-Ebenfurti Vasut Részvénytarsasag | HU | In use | gysev.hu |
| GZCDC | CD Cargo Slovakia, s.r.o. | SK | Revoked | cdcargo.sk |
| GZNFP | Gdańskie Zakłady Nawozów Fosforowych FOSFORY Sp. z o.o. | PL | In use | fosfory.pl |
| HABAU | HABAU Hoch- und Tiefbaugesellschaft m.b.H. | AT | In use | habau.at |
| HAFEN | Gernsheimer Hafenbetriebs-Gesellschaft mbH | DE | In use | |
| HAGE | Hamburger Eisenbahn e.K | DE | In use | |
| HANS | HANSeatische Eisenbahn GmbH | DE | In use | hans-eisenbahn.de |
| HAPPY | Happy Train Fleet Services B.V. | NL | In use | |
| HASIT | HASIT Šumavské vápenice a omítkárny, a.s. | CZ | In use | |
| HB | Hellertal-Bahn GmbH | DE | In use | hellertalbahn.de |
| HBA | Hafenbetrieb Aken GmbH | DE | In use | hafen-aken.de |
| HBAU | Hartung Bau, Ingenieur- Tief- und Straßenbau GmbH | DE | In use | hartung-bau.de |
| HBB | Hansebahn Bremen GmbH | DE | In use | |
| HBC | HBC Hanseatisches Bahn Contor GmbH | DE | In use | hanseatisches-bahn-contor.de |
| HBE | Verein zur Erhaltung der Hespertalbahn e.V. | DE | In use | hespertalbahn.de |
| HBFFO | Hoffmann Bauservice GmbH & Co. KG | DE | In use | hoffmann-bau-ffo.de |
| HBN | Hafenbahn Neustrelitz e.V. | DE | In use | hafenbahn-neustrelitz.de |
| HBP | Hornonitrianske bane Prievidza, a.s. | SK | In use | hbzam.sk |
| HBSRB | HBIS GROUP Serbia Iron & Steel d.o.o. Beograd | RS | In use | hbisserbia.rs |
| HC | Hessencourier e.V | DE | In use | hessencourrier.de |
| HCLOG | HEICON Service GmbH | DE | In use | |
| HCM | Vermietung von Maschinen und Geräten Dienstleistungen für Eisenbahnverkehrsunternehmen | DE | In use | |
| HCMSA | Huta Cynku “Miasteczko Śląskie” SPÓŁKA AKCYJNA | PL | In use | hcm.com.pl |
| HCTOR | Hector Rail AB | SE | In use | hectorrail.com |
| HD | Holger Dietz | DE | In use | |
| HDL | Hastings Diesels Limited | UK | In use | hastingsdiesels.co.uk |
| HDS | UEF Historischer Dampfschnellzug e.V. | DE | In use | schnellzuglok.de |
| HDST | HDS Technik GmbH | DE | In use | |
| HE | Hugo Ehlers GmbH & Co. KG | DE | Revoked | hugo-ehlers.de |
| HEB | HLB Hessenbahn GmbH | DE | In use | hessenbahn.de |
| HEBER | Heberger Hoch-, Tief- u. Ingenieurbau GmbH | DE | In use | heberger.de |
| HEF | Historische Eisenbahn Frankfurt | DE | In use | historische-eisenbahn-frankfurt.de |
| HEG | Historische Eisenbahn Gesellschaft | CH | In use | volldampf.ch/heg/ |
| HEIN | Bernd Andreas Heinrichsmeyer | DE | In use | |
| HELA | HELA Service GmbH | AT | In use | |
| HELEV | Historiche Eisenbahnfahrzeuge Lübeck e.V. | DE | In use | helev.de |
| HELF | Helf Bauunternehmung GmbH & Co.KG | DE | In use | helf-bauunternehmung.de |
| HELL | Josef Hell Bauunternehmen GmbH | DE | In use | |
| HELR | Helrom GmbH | DE | In use | helrom.com |
| HEM | Historiche Eisenbahnen Mitteldeutchland GmbH i.G. | DE | In use | |
| HEMEV | Historische Eisenbahn Mannheim e. V. | DE | In use | historische-eisenbahn-ma.de |
| HEN | Henders GmbH | DE | In use | henders.de |
| HENK | Henkel | DE | In use | |
| HENT | Hentschke Bau GmbH | DE | In use | hentschke-bau.de |
| HEROH | HEROH GmbH | DE | In use | heroh.de |
| HEROS | HEROS Helvetia Rolling Stock GmbH | CH | In use | heros-rail.com |
| HESRB | HBIS GROUP Serbia Iron & Steel d.o.o. Beograd | RS | Revoked | hbisserbia.rs |
| HETZE | Hetzelberger Bau e.K. | DE | In use | |
| HEV | Verein zur Förderung des Eisenbahnmuseums Vienenburg e.V. | DE | In use | |
| HEX | Transdev Sachsen Anhalt GmbH | DE | In use | |
| HF | Held & Francke Bau GmbH & Co KG | AT | In use | habau.at |
| HFD | Helmut Feger GmbH | DE | In use | fegergmbh-gleisbau.de |
| HFH | Container Terminal Halle (Saale) GmbH | DE | In use | ct-hs.de |
| HFM | Managementgesellschaft für Hafen und Markt mbH | DE | In use | |
| HFW | Wiebe Gleisbau GmbH | DE | In use | wiebe.de |
| HGB | Hessische Güterbahn GmbH | DE | In use | hessische-gueterbahn.de |
| HGBAU | Hering Gleisbau GhmbH | DE | In use | heringinternational.com |
| HGK | Häfen und Güterverkehr Köln | DE | In use | hgk.de |
| HGS | Höfels Gleisbau - Service GmbH | DE | In use | hoefels-gleisbau-service.de |
| HGUI | Hering Bahnbau GmbH | DE | In use | heringinternational.com |
| HHB | Hamburger Hafenbahn | DE | In use | |
| HHBAU | W.Hundhausen Bauunternehmen GmbH | DE | In use | hundhausen.de |
| HHE | Freunde der Halle-Hettstedter Eisenbahn e.V. | DE | In use | halle-hettstedter-eisenbahn.de |
| HHPI | Heavy Haul Power International GmbH | DE | In use | hhpi.de |
| HIFER | HIFER CONSTRUCCION, CONSERVACION Y SERVICIOS, S.A. | ES | In use | hifer.es |
| HIP | HIP-AZOTARA DOO | RS | In use | hip-azotara.rs |
| HISB | Historische S-Bahn e.V. | DE | In use | hisb.de |
| HIT | HIT Holzindustrie Torgau OHG | DE | In use | |
| HJH | HJH Immobilien- und Projektmanagement GmbH | AT | In use | |
| HK | Hans Kaiser GmbH & Co KG | DE | In use | |
| HKAG | Hastag Kies AG | CH | In use | hastag.ch |
| HKB | Museumseisenbahn Hümmlinger Kreisbahn e.V. | DE | In use | museumsbahn-huemmlingerkreisbahn.de |
| HKBAU | Hieden & Kall Hoch- und Tiefbaugesellschaft mbH | AT | In use | hkbau.at |
| HKHUV | H. Klostermann Baugesellschaft mbH | DE | In use | klostermann-hamm.de |
| HKO | Hilton Kommunal GmbH | DE | In use | hilton-kommunal.de |
| HKOP | Stichting Mat'54 Hondekop-vier | NL | In use | mat54.nl |
| HL | HAGANS LOGISTIC Sp. z o.o. | PL | In use | |
| HLB | HLB Basis AG | DE | In use | hlb-online.de |
| HLG | Nordlandrail GmbH | DE | In use | nordlandrail.de |
| HLM | HOLCIM S.A. | RO | In use | |
| HLP | Traditionsgemeinschaft Bw Halle P e.V. | DE | In use | |
| HLT | Region Halland / Hallandstrafiken | SE | In use | regionhalland.se / hallandstrafiken.se |
| HM | Hasselmann GmbH | DE | In use | hasselmann-gmbh.de |
| HMAN | H. Manhart GmbH | AT | In use | |
| HMBAU | H&M Bau GmbH | DE | In use | |
| HMLOK | HM lokstall | SE | In use | |
| HMTS | Heduschke Maschinentechnik Spohla | DE | In use | |
| HMVY | Haapamäen Museoveturiyhdistys ry | FI | In use | hmvy.fi |
| HOE | G.Hölzig | DE | In use | |
| HOFF | Manfred Hoffmann Baumaschinen Industrieservice | DE | In use | baumaschinen-hoffmann.de |
| HOFFM | Hoffmann Erdbau Straenbau Tiefbau GmbH & Co. KG | DE | In use | hoffmann-est.de |
| HOLCH | Holcim (Schweiz) AG | CH | In use | holcim.ch |
| HOLST | Holsteinische Eisenbahngesellschaft für historischen Verkehr gGmbH | DE | In use | |
| HPCD | Hupac Deutschland | DE | In use | hupac.de |
| HPS | HELLO PARIS SERVICES | FR | In use | |
| HPV | HPV Rail Service GmbH | CH | Revoked | hpvrailservice.ch |
| HRAIL | Eiffage Rail Niederlassung der Eiffage Infra-Bau SE | DE | Revoked | rail.eiffage-infra.de/de |
| HRDE | Hector Rail GmbH | DE | In use | hectorrail.de |
| HRI | H-Rail s.r.l. impresa sociale | IT | In use | hrail.it |
| HRK | Herik Rail | NL | In use | herikrail.nl |
| HRL | Harsco Rail Limited | UK | In use | harscotrack.com |
| HRLB | H & R Lube Blending GmbH | DE | In use | |
| HROCH | HROCHOSTROJ a.s. | CZ | In use | hrochostroj.cz |
| HROY | Höyryraide Oy | FI | In use | steamrail.fi |
| HRS | Hamburger Rail Service GmbH & Co. KG | DE | In use | wirsindamzug.de |
| HS | HAFEN STUTTGART GmbH | DE | In use | hafenstuttgart.de |
| HSA | High Speed Alliance | NL | In use | highspeedalliance.nl |
| HSB | Harzer Schmalspurbahnen | DE | In use | hsb-wr.de |
| HSD | Horst Schuch Dienstleistungen | DE | In use | |
| HSF | HSF Haltinger Speisewagenfreunde | CH | In use | |
| HSG | Vossloh High Speed Grinding GmbH | DE | In use | vossloh-rail-services.com |
| HSH | Hekurudha Shqiptare SH.A. | AL | In use | |
| HSL | HSL Logistik GmbH | DE | In use | |
| HSLAG | Hartmann Spedition & Logistik AG | DE | In use | hartmannag.de |
| HSLPL | HSL POLSKA SP. Z O.O. | PL | In use | |
| HSM | Hroší stavby Morava a.s. | CZ | In use | hrosistavby.cz |
| HSTB | Historische Seethalbahn (instead of entry: VHS) | CH | In use | historische-seethalbahn.ch |
| HSW | Historischer Schienenverkehr Wesel e.V. | DE | In use | hsw-wesel.de |
| HT | Hull Trains | UK | Blocked | hulltrains.co.uk |
| HTB | Hörseltalbahn GmbH | DE | In use | captrain.de |
| HTR | TRAINOSE S.A. | EL | In use | trainose.gr.en |
| HTRSD | HTRS SUED GMBH. | DE | In use | husatransportation.com |
| HTRSN | HTRNS Nederland bv | NL | In use | husatransportation.com |
| HTS | HTS - Mobile Schienenfahrzeugtechnik GmbH | DE | In use | hts-kassel.de |
| HU | HUPAC SpA | IT | In use | hupac.it |
| HUP | Himmel u. Papesch Bauunternehmung GmbH u. Co. KG | DE | In use | hup-bau.de |
| HUPAC | Hupac SA | CH | In use | hupac.ch |
| HVLE | Havelländische Eisenbahn AG | DE | In use | hvle.de |
| HVM | Höyryveturimatkat 1009 Oy | FI | In use | hoyryveturimatkat1009.fi |
| HW | Hastrabau-Wegener GmbH & Co. KG | DE | In use | hastrabau.de |
| HWB | HWB Hochwaldbahn Servicegesellschaft mbH | DE | In use | hochwaldbahn.de |
| HWBV | HWB Verkehrsgesellschaft mbH | DE | In use | hochwaldbahn.de |
| HWCZ | Hans Wendel CZ s.r.o. | CZ | In use | hanswendel.cz |
| HWIEN | Holcim Wien GmbH. | AT | In use | holcim.com |
| HWRE | Heinrich Wilhelm Waggonbau- und Vertriebs GmbH & Co. KG | DE | In use | heinrich-wilhelm.de |
| HWV | Hamburger Waggonvermletung GmbH | DE | In use | |
| HWZ | Hellerich Wehrs GmbH | DE | In use | |
| HX | Heathrow Express | UK | Blocked | heathrowexpress.co.uk |
| HYDR | Hydrema Baumaschinen GmbH | DE | In use | hydrema.com |
| HZ | Hrvatske Željeznice | HR | In use | hznet.hr |
| HZCAR | HŽ CARGO d.o.o. | HR | In use | hznet.hr |
| HZL | SWEG Südwestdeutsche Landesverkehrs-AG | DE | Revoked | sweg.de |
| HZPP | HŽ PUTNIČKI PRIJEVOZ d.o.o. za prijevoz putnika | HR | In use | hzpp.hr |
| HZVV | HŽ VUČA VLAKOVA | HR | In use | hznet.hr |
| IB | Inntalbahn KG | DE | In use | |
| IBAB | Inlandsbanan AB | SE | In use | inlandsbanan.se |
| IBERC | IBERCARGORAIL, S.A. | ES | In use | |
| IBERT | IBERTIF FERROCARRILES, S.A. | ES | In use | ibertifferrocarriles.com |
| IBF | Ing Büro Förster | DE | In use | |
| IBL | Ingenierbüro Lohr | DE | In use | |
| IBV | IBEROVÍAS EMPRESA CONSTRUCTORA, S.A. | ES | In use | iberovias.com |
| IC | Inter Cargo sp. z o. o. | PL | In use | |
| ICDAS | IÇDAŞ ÇELIK ENERJI TERSANE VE ULAŞIM SANAYII A.Ş. | TR | In use | icdas.com.tr |
| ICDUE | I.C.E.F.E DUE SRL | IT | In use | |
| ICF | Interfrigo/Intercontainer | BE | In use | icfonline.com |
| ICIM | ICIM ARAD SA | RO | In use | steauaromana.ro |
| ICJSC | ИНФРACTPУКTУPНО CTPOИЛCTBO AД | BG | In use | infrastroi.com |
| ICOSK | Icopal, a.s. Štúrovo | SK | In use | |
| ICPVA | ICPV Arad | RO | In use | |
| ID | CARGOUNIT sp. z o.o. | PL | In use | cargounit.pl |
| IDIS | iDispo UG (haftungsbeschränkt) | DE | In use | |
| IDS | IDS - Inženýrské a dopravní stavby Olomouc a.s. | CZ | In use | |
| IDSC | IDS CARGO a. s. | CZ | In use | ids-cargo.cz |
| IDSLC | IDS LocoCars s.r.o. | CZ | In use | ids-lococare.cz |
| IE | Iarnrod Eireann (Coras Iompair Eireann) | IE | In use | irishrail.ie |
| IECD | ELECTROCENTRALE SA DEVA | RO | In use | termodeva.ro |
| IF | Innofreight Solutions GmbH | AT | In use | innofreight.com |
| IFB | INTERFERRYBOATS NV | BE | In use | interferryboats.be |
| IFT | Interfracht, s r.o. | CZ | In use | interfracht.cz |
| IFTEC | IFTEC GmbH & Co. KG | DE | In use | iftec.de |
| IGAS | INTERGAS d.o.o. BEOGRAD | RS | In use | intergas.co.yu |
| IGB | Industriebahn-Gesellschaft Berlin | DE | In use | captrain.de/unternehmen/standorte/igb-industriebahn-gesellschaft-berlin |
| IGDA | IG Bw Dresden-Altstadt e.V. | DE | In use | igbwdresden-altstadt.de |
| IGE | IGE Internationale Gesellschaft für Eisenbahnverkehr GmbH & Co. KG | DE | In use | ige-bahn.de |
| IGEBA | IGEBA – Ingenieurgesellschaft Bahn mbH | DE | In use | |
| IGEW | IGE "Werrabahn Eisenach" e.V | DE | In use | ige-werrabahn-eisenach.de |
| IGHB | IG Hirzbergbahn e.V | DE | In use | hirzbergbahn.de |
| IGL | IGL sp. z o. o. sp. k. | PL | In use | |
| IGN | IG Nebenbahn Nordhessen e.V | DE | In use | |
| IGR | I. G. Rail, s. r. o. | SK | In use | |
| IGRS | IG Residenzbahnhof Sondershausen e.V | DE | In use | |
| IGSEE | 3 Seenbahn gGmbH | DE | In use | 3seenbahn.de |
| IGSS | Interessengemeinschaft Schienebus Seelze e.V. | DE | In use | schienenbus-seelze.de |
| IGT | IGT Inbetriebnahmegesellschaft Transporttechnik mbH | DE | In use | igt-bahn.de |
| IGTL | IG Traditionslok 58 3047 e.V. | DE | In use | dampflok-glauchau.de |
| IGZ | INVESTEX GROUP, s.r.o. | SK | In use | investex-group.sk |
| IHINV | IH Invest s.r.o. | SK | In use | |
| IK | Infrakraft Sverige AB | SE | In use | infrakraft.se |
| IKBL | IKB Leasing SR s.r.o. | SK | In use | ikb-leasing.sk |
| IKEA | IKEA INDYSTRY SLOVAKIA s.r.o. | SK | In use | |
| IKN | Jutta & Dr. Thomas Kittel-Stiftung | DE | In use | |
| IL | Island Line | UK | Blocked | island-line.co.uk |
| ILM | Ilmebahn | DE | In use | ilmebahn.de |
| ILO | Wojciech Iłowiecki | PL | In use | |
| IMB | Implenia Modernbau GmbH | DE | In use | modernbau.implenia.com |
| IMBC | Louis IMBERT & Cie | FR | In use | |
| IMBJ | Wagons Citernes Joseph IMBERT | FR | In use | |
| IMBU | Imbusch Geratevermletung und Dienstleistung GmbH | DE | In use | |
| IMERY | Imerys Graphite & Carbon Switzerland Ltd | CH | In use | |
| IMFSA | Ingeniería de Maquinaria Ferroviaria S.A. | ES | In use | imfsa.es |
| IMLOG | Imbach Logistik AG | CH | In use | imbach-logistik.ch |
| IMO | Imotrans | DE | In use | imotrans.de |
| IMS | Instandhaltung Management Service GmbH | DE | In use | i-m-s.eu |
| IMSAT | IMSAT SA | RO | In use | imsat.ro |
| IMTI | IMATEQ Italia srl | IT | In use | imateq.it |
| INA | INA d.d. | HR | In use | ina.hr |
| INAB | INSTALACIONES INABENSA | ES | In use | inabensa.com |
| INAS | Infranord Norge AS | NO | In use | infranord.se/no/no-hjem |
| INBUG | INTERBUG Sp. z o.o. | PL | In use | |
| INCOR | Przedsiębiorstwo Usług Technicznych Intercor sp. z o.o. | PL | In use | intercor.eu |
| INDET | IND EKS TRADE EOOD | BG | In use | |
| INDEX | Intradex S.A. | PL | In use | intradex.pl |
| INEO | INEO SCLE FERROVIAIRE S.N.C. | IT | In use | |
| Ineos | Ineos Sverige AB | SE | In use | ineos.se |
| INFBL | INFRABEL N.V. | BE | In use | infrabel.be |
| INFRA | Infranord AB | SE | In use | infranord.se |
| INGDE | Ing. De Aloe Costruzioni s.r.l. | IT | In use | |
| INKOM | P.W. INTER-KOMTRANS SYLWESTER KOMISAREK | PL | In use | |
| INNR | Innrail Eisenbahndienstleistugen UG | DE | Revoked | innrail.com |
| INOSB | "INOS-BALKAN" doo Valjevo | RS | In use | inosbalkan.com |
| INR | INRAIL | IT | In use | inrail.it |
| INSA | "Insa Gas" OOD | BG | In use | insa.bg/insagas/ |
| INT | ČSKD - INTRANS a.s. | CZ | In use | intrans.cz |
| INTBA | Intertop-Bau GmbH | DE | In use | |
| INTEG | IntEgro Verkehr GmbH | DE | In use | integro-verkehr.com |
| INTER | ИНTEPKOM EOOД | BG | In use | |
| INTHO | INTHO GmbH | DE | In use | intho.de |
| INTOR | Przedsiębiorstwo Wielobranżowe IN-TOR s.c. | PL | In use | |
| INTRA | Innovatrain AG | CH | In use | innovatrain.ch |
| INTSK | Slovenska kombinovana doprava INTRANS, a.s. | SK | In use | intrans.cz |
| INVAT | INVATRA ALCAZAR, S.L. | ES | In use | invatraalcazar.com |
| IP | INTERPORT Spedition s.r.o. | CZ | In use | interport.cz |
| IPBO | Interporto Bologna Spa | IT | In use | interporto.it |
| IPC | IP CALL, spol. s r.o. | CZ | In use | |
| IPELC | IPE LOCOMOTORI 2000 SRL | IT | In use | |
| IPK | INTERNATIONAL PAPER-KWIDZYN Sp. z o.o. | PL | In use | |
| IPZ | IPZ GmbH | DE | In use | ipz-sicherheitsdienstleistungen.de |
| IR | Indian Railways | IN | In use | |
| IRAIL | Ing. Igor Rerich – obchodno výrobná činnosť | SK | In use | |
| IRC | SC INTERREGIONAL CALATORI SRL | RO | In use | viaterraspedition.ro |
| IRECF | Instalaciones Recursos Ferroviarios, S.L. | ES | In use | |
| IRIPK | Instytut Rozwoju i Promocji Kolei sp. z o.o. | PL | In use | iripk.pl |
| IRR | Iraqi Republic Railways Establishment | IQ | In use | |
| IRSI | International Rolling Stock Investment GmbH | CH | In use | |
| IRT | IRT sp. z o.o. | PL | In use | |
| IRVCB | IRV CARANSEBES SA | RO | In use | |
| IRY | INTERMODALIDAD DE LEVANTE, S.A. | ES | In use | ilsarail.eu |
| ISAF | ISAF SA | RO | In use | isaf.ro |
| ISAM | ISAM S.r.l. | IT | In use | |
| ISC | ISC-INTERPORTO Servizi Cargo S.P.A. | IT | In use | |
| ISF | ISF infra.service.franken | DE | In use | |
| ISG | Infraservice Group Scandinavian AB | SE | In use | infraservice.nu |
| ISL | Infraserv Logistics GmbH | DE | In use | infraservlogistics.com |
| ISLUX | ISOLUX INGENIERIA, S.A. | ES | In use | isoluxcorsan.com |
| ISPAL | ISPALVIA, S.L.U | ES | In use | grupoazvi.com |
| ISR | Israel Railways | IL | Blocked | israrail.org.il |
| ISS | ISS Trafficare AB | SE | In use | se.issworld.com |
| ISSAB | Intercontainer Sweden SUCO AB | SE | Revoked | intercontainer.ee |
| ITA | I.T.A. srl - INTERNATIONAL TRADING AGENCY | IT | In use | |
| ITAB | Interfleet AB | SE | In use | interfleet.se |
| ITAG | Inlandståget AB | SE | In use | inlandstaget.se |
| ITB | ITB Industrietransportgesellschaft mbH Brandenburg EVU | DE | In use | villmann-gruppe.de |
| ITC | Inter Chem Trading sp. z o.o. | PL | In use | interchemtrading.pl |
| ITEK | Infratek Sverige AB | SE | In use | infratek.se |
| ITG | ITG Transportmittel GmbH | AT | In use | |
| ITGZW | ITG Ingenieur-, Tief- und Gleisbau GmbH | DE | In use | itg-stralsund.de |
| ITL | ITL Eisenbahngesellschaft mbH | DE | In use | itl-dresden.de |
| ITLB | ITL-Benelux | NL | In use | itl-benelux.com |
| ITLPL | ITL Polska Spólka z.o.o. | PL | In use | itlpolska.com.pl |
| ITRUD | ISAR-TANK F.U.H Rudolf GdbR | DE | Revoked | |
| ITX | InterTourex GmbH | DE | In use | intertourex.de |
| IUYGN | Ismail Uygun Loj. Hiz. Madencilik San. Ve Tic. Ltd. Şti | TR | In use | |
| IVB | Innsbrucker Verkehrsbetriebe | AT | Revoked | ivb.at |
| IVE | IVECOS SPA | IT | In use | ivecos.it |
| IVK | Ing Vladimir Křiž | CZ | In use | |
| IVMW | Interessenvereinigung Verkehrsgeschichte mittleres Werratal (IVmW) e.V. | DE | In use | ivmw-ev.de/start.html |
| IVP | Imatran Veturipalvelu Oy | FI | In use | |
| IWAG | Industriewaggon GmbH | AT | Revoked | |
| IZBAN | İZMIR BANLIYÖ TAŞIMACILIĞI SISTEMI TİCARET A.Ş. | TR | In use | izban.com.tr |
| IZREM | Przedsiębiorstwo Remontowo Budowlane "IZOBUD - REM" Jan Horoszkiewicz | PL | In use | izobud.pl |
| JAAJ | Järnvägssällskapet Åmål-Årjängs Järnväg | SE | In use | jaaj.tk |
| JACEK | PPHU Jacek Surdyk | PL | In use | pphu-js.pl |
| JAK | JANSSEN GmbH & Co. KG | DE | In use | Janssen-landschaftspflege.de |
| JALI | Jaromír Lienert - JALI | CZ | In use | |
| JARO | JARO Česká Skalice, s.r.o. | CZ | In use | jarocs.eu |
| JAVA | Jan Vágenknecht | CZ | In use | |
| JAVYS | Jadrová a vyradovacia spoločnost, a.s. | SK | In use | |
| JAXAN | JAXAN GROUP SP. Z O.O. | PL | In use | |
| JB | Jungfraubahn | CH | In use | jungfraubahn.ch |
| JBM | Norsk Jernbanemuseum | NO | In use | norsk-jernbanemuseum.no |
| JBV | Bane NOR SF | NO | Revoked | banenor.no |
| JC | Jura-Cement-Fabriken | CH | In use | ermewa.ch |
| JD | JD Sp. z o.o. Sp. k. | PL | Revoked | jdtrade.com.pl |
| JESSL | Brüder Jessl KG | AT | In use | jessl.at |
| JFT | J. Fijn Techniek B.V. | NL | In use | jacko-fijntechniek.nl |
| JFTF | JFT Fleetmanagement BV | NL | In use | jacko-fijntechniek.nl |
| JG | Jaweed GmbH | DE | In use | jaweed.eu |
| JH | Joseph Hubert Bauunternemung GmbH & Co.KG | DE | In use | jhubert.de |
| JHMD | Jindřichohradecké mistni dráhy, a.s. | CZ | In use | jhmd.cz |
| JHSAB | JH Spårservice AB | SE | In use | sparservice.se |
| JHT | JH train services s.r.o. | CZ | In use | jhtrain.cz |
| JISE | Šejbl Jiří | CZ | In use | |
| JJKY | Joutjärvi & Joutjärvi Ky | FI | In use | joutjarvi.fi |
| JK | Johannes Klinger GmbH u. Co. KG Heide | DE | In use | klingerkg.de |
| JKERC | E-Railconstruct s.r.o. | CZ | In use | e-railconstruct.cz |
| JKOY | Pääkaupunkiseudun Junakalusto Oy | FI | In use | junakalusto.fi |
| JKS | Ing. Jiři Kotas | CZ | In use | |
| JKY | Junakulttuuriyhdistys ry | FI | In use | junakulttuuriyhdistys.fi |
| JLT | Region Jönköpings län, Jönköpings Länstrafik | SE | In use | jlt.se |
| JLZR | Jelzőőr Kft. | HU | In use | jelzoorkft.hu |
| JMAG | J. Müller AG (Sersa Group) | CH | Revoked | jmag.ch |
| JMBV | Jens Müller BaumaschinenVERMIETUNG | DE | In use | grabinger-tiefbau.de |
| JMK | Jihomoravský kraj | CZ | In use | kr-jihomoravsky.cz |
| JMR | Josef Meyer Waggon AG | CH | In use | josefmeyer.ch |
| JMS | Jemisoft Oy | FI | In use | |
| JN | Johannes Janßen GmbH & Co.KG | DE | In use | johannes-janssen.com |
| JOERG | Jörger GmbH | DE | In use | joerger-bau.de |
| JOSE | Josera GmbH & Co KG | DE | In use | josera.de |
| JPAVL | Jan Pavliček | CZ | In use | |
| JPK | Jelezopaten komplex / "Железопътен комплекс" ЕАД | BG | In use | |
| JR | Jumbo Rail GmbH | DE | Revoked | |
| JRZWB | Josef Rädlinger Kiesbaggerei und Fuhrunternehmen Gmbh & Co. KG | DE | In use | raedlinger.com |
| JSK | Jastrzębska Spółka Kolejowa Sp. z o.o. | PL | In use | jsk.pl |
| JT | Jumbotec GmBH | DE | In use | |
| JTJ | Jädraås-Tallås Järnväg | SE | In use | |
| JUBU | Technische Beratungen und Entwicklungen | DE | In use | |
| JULA | Jula AB | SE | In use | jula.se |
| JUMA | Junior market s.r.o. | CZ | In use | juniormarket.cz |
| JUSO | JUSO s.r.o. | SK | In use | |
| JUST | Stauffer, Schienen- und Spezialfahrzeuge, Frauenfeld | CH | In use | schienenfahrzeuge.ch |
| JUV | Jaeger Umwelt + Verkehr GmbH + Co KG | DE | In use | jaeger-bernburg.de |
| JW | Johann Walthelm GmbH | DE | In use | walthelm.com |
| JWB | Jade-Weser-Bahn GmbH | DE | In use | jade-weser-bahn.de |
| KA | Franz Kassecker GmbH | DE | In use | kassecker.de |
| KAABS | Kaabs Nordic AB | SE | In use | kaabs.se |
| KAF | KAF Falkenhahn Bau AG | DE | In use | falkenhahn.de |
| KAFTT | Falkenhahn Baugesellschaft mbH | DE | In use | falkenhahn.de |
| KAGO | A. Kaufmann AG | CH | In use | kago.ch |
| KALE | KALENAKLIYAT SEYAHAT VE TURIZM A.Ş. | TR | In use | kalenakliyat.com.tr |
| KALI | "K+S Minerals and Agriculture GmbH | | | |
| KALV | Kalvacha Gas / Кълвача Газ | BG | In use | kalvacha.bg |
| KALVN | Kalvacha Energia / Кълвача Енергия | BG | In use | kalvacha.bg |
| KAM | Karel Mikolášek | CZ | In use | |
| KAREL | Stichting De Karel Foundation | NL | In use | karel.rocks |
| KARO | Karo As Umweltschutz GmbH | DE | In use | |
| KARP | KÁRPÁT Vasút Kft | HU | In use | |
| KARYA | Karya sp. z o.o. | PL | In use | karya.pl |
| KATZI | Philipp Katzenschlager | AT | In use | |
| KAUN | Kaunis Iron AB | SE | In use | |
| KB | Kullmann Bauservice GmbH | DE | In use | |
| KBB | Deutsche Gesellschaft für Eisenbahngeschichte e.V | DE | Revoked | eisenbahnmuseum-neustadt.de |
| KBEF | Köln-Bonner Eisenbahn -Freunde e.V | DE | In use | kbef-ev.de |
| KBF | Korsnäs AB, Produktion Frövi | SE | In use | korsnas.com |
| KBG | Korsnäs AB, Produktion Gävle | SE | In use | korsnas.com |
| KBS | KOLEJ BAŁTYCKA - SERWIS Sp. z o.o. | PL | In use | |
| KBSA | Kolej Bałtycka S.A. | PL | In use | kolejebaltyckie.pl |
| KBTK | KARPIEL sp. z o.o. | PL | In use | karpiel.info.pl |
| KBW | Kleinbahn Bielstein-Waldbröl e.V. | DE | In use | |
| KC | ČD Cargo Poland Sp. z o.o. | PL | In use | |
| KCL | KUBE CON logistics GmbH | DE | In use | kubecon.com |
| KCM | KTsM PLC / КЦМ АД | BG | In use | kcm.bg |
| KCR | KUBE CON rail GmbH | DE | In use | kubecon.com |
| KD | Koleje Dolnośląskie Spółka Akcyjna | PL | In use | kolejedolnoslaskie.eu |
| KDR | Kraftdragarn AB | SE | In use | kraftdragarna.se |
| KDS | Kladenská dopravní a strojní s.r.o. | CZ | In use | kdskladno.cz |
| KDSC | KDS Cargo s.r.o. | CZ | In use | kds-cargo.net |
| KDSI | KDS - Kladenská dopravní a strojní s.r.o. | CZ | In use | |
| KDSSK | Koľajové a dopravné stavby s.r.o. | SK | In use | kds.sk |
| KE | Kemming, Wilhelm e. Kfm. | DE | In use | kemming.de |
| KEADH | Kemming Agrardienstleistungs GmbH | DE | In use | kemming.de |
| KEG | Karsdorfer Eisenbahngesellschaft mbH | DE | In use | privatbahn.de |
| KELS | Keolis Sverige AB | SE | In use | keolis.se |
| KEM | Kemwater ProChemie s.r.o. | CZ | In use | |
| KEN | Kentaur GmbH | CH | In use | kentaur.ch |
| KEO | Keolis B.V. | NL | In use | keolis.nl |
| KERAM | KERAMOST, akciová společnost | CZ | In use | |
| KFV | Központi Felépítményvizsgáló Kft. | HU | In use | mavkfv.hu |
| KG | Kölngleis Gleisbau GmbH & Co. KG | DE | In use | |
| KGA | Karlskoga Kommun | SE | In use | karlskoga.se |
| KGBTK | Köhnke Geräte- und Bau GmbH | DE | In use | koehnke-bau.de |
| KGHMG | KGHM Polska Miedz SA Oddział Huta Miedzi Głogów | PL | In use | kghm.pl |
| KGR | Kirgizian Railways (KГР) | KG | In use | railway.aknet.kg |
| KGT | KGT Gleis- und Tiefbau GmbH | DE | In use | kgt-bau.de |
| KHKD | HERKULES KHKD s.r.o. | CZ | In use | khkd.cz |
| KHKV | OZ-Klub historických koľajových vozidiel pri RD Haniska pri Košiciach | SK | In use | khkv.sk |
| KHR | Kübler Heavy Rail GmbH | DE | In use | kuebler-heavy-rail.com |
| KHT | Klub historickej techniky pri Rušňovom depe Zvolen | SK | In use | kht.sk |
| KI | Kockums Industrier AB | SE | In use | kockumsindustrier.se |
| KIEL | Seehafen Kiel | DE | In use | port-of-kiel.de |
| KIL | Kils kommun | SE | In use | kil.se |
| KIRK | Sappi Finland I Oy, Kirkniemen tehdas | FI | In use | sappi.com |
| KJ | Karel Just | CZ | In use | |
| KK | KK provoz a opravy lok. s.r.o. | CZ | In use | |
| KKB | KKB s.r.o. | CZ | In use | |
| KKD | KKD Tiefbau GmbH | DE | Revoked | |
| KKLB | Kolej-klub, o.s. | CZ | In use | kolejklub.cz |
| KKMAX | Zakład Wielobranżowy „TOR-MAX” Krzysztof Kulesza | PL | Revoked | |
| KKS | Kibag Kies Seewen AG | CH | In use | zingel.ch |
| KKTOR | Tor-Max sp. z o.o. | PL | In use | |
| KKZ | Kombinat Koksochemiczny "Zabrze"S.A | PL | In use | kkzabrze.com.pl |
| KLE | Klefenz GmbH | DE | In use | klefenz-tiefbau.de |
| KLENK | Rhomberg Sersa Deutschland Südwest GmbH | DE | In use | rhomberg-sersa.de |
| KLEY | Kley's Baumaschinen | DE | In use | |
| KLGB | Verein Kaltenleutgebner Bahn | AT | In use | kaltenleutgebnerbahn.at |
| KLH | v. Kintzel & Lauser GmbH & Co.K | DE | In use | |
| KLN | KLN LOGISTIK SAN.VE TIC.A.Ş. | TR | In use | klnlojistik.com |
| KLOPP | BPE Sven Klopp | DE | In use | |
| KLP | Przedsiębiorstwo Usług Kolejowych KOLPREM Sp. z o.o. | PL | In use | kolprem.pl |
| KLT | Kalmar Länstrafik AB | SE | In use | klt.se |
| KLTAR | Grupa Azoty “KOLTAR” Sp. z o.o. | PL | In use | |
| KMAL | Koleje Małopolskie sp. z o.o. | PL | In use | malopolskiekoleje.com.pl |
| KMD | Kutnohorská místní dráha o.s. | CZ | In use | kmd.xf..cz |
| KMDR | Kroměřížská dráha z.s. | CZ | In use | kmdraha.cz |
| KMKOL | „Koleje Mazowieckie – KM” sp. z o.o. | PL | In use | mazowieckie.com.pl |
| KML | Kreisbahn Mansfelder Land | DE | In use | wipperliese.de |
| KMOY | Keitele-Museo OY | FI | In use | aanekoski.fi/keitelemuseo |
| KMS | Kesälahden Maansiirto OY | FI | In use | kesalahdenmaansiirto.fi |
| KMW | KMW GbR | DE | In use | |
| KN | Kurt Nitzer GmbH&Co. KG | DE | In use | |
| KNAPE | Knape Gleisbau GmbH & Co KG | DE | In use | knape.de |
| KNAPP | Knapp Engineering GmbH | DE | In use | knapp-engineering.de |
| KNAUF | Knauf Deutsche Gipswerke. KG | DE | In use | knauf.de |
| KNFTR | Knauf Insaat Ve Yapi Elemanlari San. Ve Tic. A.S. | TR | In use | knauf.com.tr |
| KNIGL | Königl GmbH & Co. KG | DE | In use | koenigl.de |
| KNOW | KHT Know How Transfair U.G. (haftungsbeschränkt) | DE | In use | |
| KOD | Krailling Oils Development GmbH | DE | In use | kraillingoils.de |
| KOE | Kurt König Baumaschinen GmbH | DE | In use | kurt-koenig.de |
| KOGWR | Zespół Elektrociepłowni Wrocławskich KOGENERACJA S.A. | PL | In use | kogeneracja.com.pl |
| KOHR | KOHRMANN Baumaschinen GmbH | DE | In use | kohrmann-baumaschinen.de |
| KOKTS | Köktaş Lojistik Demiryolu Taşımacılığı ve İşletmecılığı Vagon Bakım Onarım Gemi İnşaat maden Tic. San. A.Ş. | TR | In use | koktasgrup.com |
| KOL | KOLSAM Sp. z o.o. | PL | In use | |
| KOLIN | PPUH KOLINSTAL Henryk Jakubiec | PL | In use | |
| KOMBI | Kombiverkehr GmbH& Co KG | DE | In use | kombiverkehr.de |
| KOMS | KOMSOR OY | FI | In use | komsor.fi |
| KORR | KORRAL, s. r. o. | SK | In use | korral.sk |
| KOS | Krnovské opravny a strojírny spol. s r.o. | CZ | In use | |
| KOST | KOS Trading, akciová společnost | CZ | In use | |
| KOTRC | Lucie Kotrcová | CZ | In use | |
| KOVOK | KOVOHUTY, a.s. | SK | In use | kovohuty.sk |
| KOYO | KOYO ROMANIA S.A. | RO | In use | |
| KP | Kombinovani prevoz d.o.o., Novi Beograd | RS | In use | kprevoz.co.rs |
| KPEV | Historischer Eisenbahnpark Niederrhein gUG | DE | In use | |
| KPHZD | Klub priatel’ov histórie železničnej dopravy | SK | In use | kphzd.sk |
| KPKLK | Kopalnia Piasku Kotlamia - Linie Kolejowe sp. Z o.o. | PL | In use | kotlarnia.com.pl/html/linie.html |
| KPKOT | KOPALNIA PIASKU “KOTLARNIA" SPÓŁKA AKCYJNA | PL | In use | kotlarnia.com.pl |
| KPT | Klub přátel Transverzálky, z.s. | CZ | In use | kptrail.cz |
| KPZCR | Klub přátel železnic Českého ráje, z.s. | CZ | In use | 3100134.cz |
| KR | Komplex Rail Vasúti Szolgáltató Kft. | HU | In use | komplexrail.hu |
| KRAUS | Marcus Kraus | DE | Revoked | |
| KRB | Norsk Jernbaneklubb - Krøderbanen | NO | In use | njk.no/kroderbanen |
| KRCAL | Kronospan Chemical Szczecinek S p. z o.o. | PL | In use | kronospan.pl |
| KRCHE | Alfa Terminal Szczecin Sp. z o.o. | PL | Revoked | kronospan.pl |
| KRE | Kombirail Europe B.V. | NL | In use | kombirail.eu |
| KREAT | Kreate Rata Oy | FI | In use | kreaterata.fi |
| KREBS | Krebs GmbH & Co KG | DE | In use | krebs-gleisbau.de |
| KREM | Kremikovtzi AD | BG | In use | |
| KRIS | Krzysztof Janakowski prowadzący działalność gospodarcza pod firmą: P.H.U “KRIS-MAX” Krzysztof Janakowski | PL | In use | |
| KRITT | Manfred Kritter | DE | In use | |
| KRL | KonRail GmbH | DE | In use | konrail.de |
| KRO | Kronospan CR s.r.o. | BG | In use | kronospan.cz |
| KRONO | Länstrafiken Kronoberg | SE | In use | lanstrafikenkron.se |
| KRONR | SC KRONOSPAN ROMANIA SRL | RO | In use | |
| KRS | KAIROS SRL | RO | In use | |
| KRSSW | KRS GmbH Klefenz Rail – Services | DE | In use | klefenz-railservices.de |
| KRT | "КАМЕКС КОМЕРС" EOOD | BG | In use | |
| KRUSZ | Budokrusz S.A. | PL | In use | budokrusz.pl |
| KS | LB CEMIX,s.r.o. | CZ | In use | |
| KSC | Krajowa Spółka Cukrowa S.A. | PL | In use | polski-cukier.pl |
| KSE | Karl Seltenhammer | AT | In use | |
| KSG | Grupa Azoty Kopalnie i Zakłady Chemiczne Siarki “Siarkopol’ S.A. | PL | In use | siarkopol.eu |
| KSGBL | KSG-Bau GmbH Lampertswalde | DE | In use | ksg-lampertswalde.de |
| KSK | Klub Sympatyków Kolei | PL | In use | ksk.wroclaw.pl |
| KSKT | KSK Transport sp. z o. o. | PL | In use | ksktransport.pl |
| KSL | Koleje Śląskie Sp. z o.o. | PL | In use | kolejeslaskie.com |
| KSR | Köstner -Schienenbusreisen | DE | In use | museumsferkel.de |
| KSRFI | Karhulan-Sunilan Rautatie Oy | FI | In use | |
| KSS | Kopalnie Surowców Skalnych w Bartnicy sp. z o.o. | PL | In use | bartnica.com.pl |
| KSV | Kompetenz für Schienengebundene Verkehre GmbH | DE | In use | ksv-europe.de |
| KSW | Kreisbahn Siegen Wittgenstein | DE | In use | siegener-kreisbahn.de |
| KT | OY Karelian Trans Ltd | FI | In use | kareliantrains.fi |
| KTB | Zweckverband Kandertalbahn | DE | In use | kandertalbahn.de |
| KTL | AZ-KOVEX plus s.r.o. | SK | In use | |
| KTLAB | KtlTek AB | SE | In use | |
| KTM | Kellner Telecom GmbH | DE | In use | kellner-telecom.de/home.html |
| KTRNS | Kelet-Trans 2000 Kft. | HU | In use | kelettrans2000.hu |
| KUAS | Körfez Ulaştırma A.Ş. | TR | In use | korfezulastirma.com.tr |
| KUB | Florian Mencle | DE | In use | |
| KUBA | Mateusz Pietrzak GTC – Global Transport Company | PL | In use | |
| KUBFM | Florian Mencle | DE | In use | |
| KUK | KUK - Kompleksowe Usługi Kolejowe sp. z o.o. | PL | In use | kuk-kolej.pl |
| KUMA | Kummler+Matter AG | CH | In use | kuma.ch |
| KUR | Christian Ruzika und Thomas Kaiser GbR | DE | In use | |
| KV | Kalmar Veterantåg | SE | In use | kalmarveterantag.se |
| KVBAG | Kölner Verkhers-Betriebe-AG | DE | In use | kvb-koeln.de |
| KVG | Kahlgrund-Verkehrs-GmbH | DE | In use | kvg-bahn.de |
| KVGH | GATX Rail Austria GmbH | AT | Revoked | gatx.eu |
| KVGV | GATX Rail Austria GmbH | AT | Revoked | gatx.eu |
| KVK | Krkonošské vápenky Kunčice, a.s. | CZ | In use | |
| KVP | Kymen Veturipalvelu Oy | FI | In use | |
| KWB | PAK Kopalnia Węgla Brunatnego Konin S.A. | PL | In use | kwbkonin.pl |
| KWC | Kopalnia Wapienia “Czatkowice | PL | In use | czatkowice.com.pl |
| KWE | Kleinbahn Wathlingen-Ehlershausen e.V | DE | In use | kalibahn.de |
| KWERD | KW Erdbau GmbH | DE | In use | |
| KWG | ˮКоловагˮ АД | BG | In use | kolowag.bg |
| KZA | Krakowskie Zakłady Automatyki S.A. | PL | In use | kza.com.pl |
| KZC | KŽC Doprava s.r.o. | CZ | In use | kzc.cz |
| KZD | Chinese Railways (KЖД) | CN | In use | |
| KZGP | KÖZGÉP Építő-és Fémszerkezetgyártó Zrt. | HU | In use | kozgep.hu |
| KZH | Chemins de fer du Kazachstan (KЗХ) | KZ | In use | railways.kz |
| KZHV | Klub železničných historických vozidiel Poprad | SK | In use | kzhv.eu |
| KZMPR | Klub železničních modelářů a přátel železnice Přerov,z.s. | CZ | In use | kzm.prerov.cz |
| KZMVR | Klub železničnych modelárov Vrŭtky | SK | In use | kzmvrutky.com |
| KZN | Kolejowe Zakłady Nawierzchniowe „Bieżanów” sp. z o.o. | PL | In use | kzn.pl |
| KZNBV | Klub železničnej nostalgie Bratislava východ | SK | In use | kzn.sk |
| KZNR | KZN Rail sp. z o.o. | PL | In use | kznrail.pl |
| LAAAB | Lundstams Åkeri & Åkeri & Återvinning AB | SE | In use | lundstams.se |
| LAB | LAFARGE AGREGATE BETOANE SA | RO | In use | |
| LADE | Laude Assets GmbH | DE | In use | laude.com |
| LAEND | SWEG Bahn Stuttgart GmbH | DE | In use | sweg.de |
| LAFHU | LAFARGE Cement Hungary Ltd. | HU | In use | lafarge.hu |
| LAG | LAFARGE ARCOM GIPS SA-PUNCT DE LUCRU AGHIRES | RO | In use | lafarge.ro |
| LAN | Landor | CH | In use | landor.ch |
| LANGE | Lange & CoGmbH | DE | In use | |
| LANTA | LANTANIA, S.L. | ES | In use | lantania.com |
| LASCH | Lasch GmbH Zwickau | DE | In use | diegleisbauer.de |
| LAT | LAT Fernmelde, Montage und Tiefbau GmbH | DE | Revoked | Iat.de |
| LAU | Laude Smart Intermodal S.A. | PL | In use | laude.pl |
| LAUDE | Laude Smart Intermodal S.A. | PL | Revoked | laude.pl |
| LAUFF | Spiess-Urania-Chemicals GmbH | DE | In use | |
| LB | Lokalbanen A/S | DK | In use | lokalbanen.dk |
| LBA | Logistikbasis der Armee | CH | In use | |
| LBHN | L. Brüggemann KG | DE | In use | brueggemann.com |
| LBL | LOCON Benelux B.V. | NL | In use | locon-benelux.com |
| LBM | LB MINERALS, a.s. | CZ | In use | lb-minerals.cz |
| LBNMB | Föreningen Landabanan | SE | In use | landabanan.com |
| LBR | Länderbahnreisen Manuel Jußen e.K. | DE | In use | |
| LBVX | vlexx GmbH | DE | In use | vlexx.de |
| LBW | Lubelski Wegiel ''Bogdanska'' S.A. W Bogdance | PL | In use | bogdanka.lublin.pl |
| LC | Lafarge Cement a.s. | CZ | In use | |
| LCDB | Lokomotiv-Club 103 e.V. | DE | In use | lokomotiv-club103.de |
| LCF | LOCOFER | FR | In use | |
| LCH | Logistic Center Hungária Kft. | HU | In use | |
| LCIT | Locoltalia Srl | IT | In use | locoitalia.it |
| LCR | Low Cost Rail SA | ES | In use | lcrail.com |
| LDB | Lokdienste Braun GmbH | DE | In use | lokdienste-braun.de |
| LDC | Lausitzer Dampflok Club e.V | DE | In use | |
| LDK | Leipziger Dampf KulTour | DE | In use | |
| LDS | LDS GmbH | DE | In use | ldsgmbh.de |
| LDZ | Valsts Akciju Sabiedriba "Latvijas Dzelzcels" | LV | Blocked | ldz.lv |
| LE | Leo Expres, a.s. | CZ | In use | |
| LEACZ | Čestmír Káňa - LEARKA | CZ | In use | |
| LEAG | Lausitz Energie Bergbau AG | DE | In use | leag.de |
| LEB | Compagnie du Chemin de fer Lausanne-Echallens-Bercher | CH | In use | leb.ch |
| LEG | LEG Leipziger Eisenbahnverkehrsgesellschaft mbH | DE | In use | leipziger-eisenbahn.de |
| LEGET | RTC Luka Leget AD | RS | In use | leget.rs |
| LEITH | Leithenmayr GmbH | AT | In use | |
| LEL | Landeseisenbahn Lippe e.V. | DE | In use | landeseisenbahn-lippe.de |
| LERG | LERG S.A. | PL | In use | |
| LET | Leo Expres Tenders s.r.o. | CZ | In use | le.cz |
| LETEA | LETEA S.A. | RO | In use | letea.ro |
| LEUNA | InfraLeuna GmbH | DE | In use | infraleuna.de |
| LEVEN | LEVEN DESARROLLOS, S.L. | ES | In use | levensl.com |
| LF | LOGISTICA FEROVIARA SRL | RO | In use | |
| LFB | Limfjordsbanen | DK | In use | Limfjordsbanen.dk |
| LFGRO | LAFARGE CIMENT (ROMANIA) SA | RO | In use | lafarge.ro |
| LFI | Transporto Ferroviario Toscano | IT | In use | trasportoferroviariotoscano.it/ |
| LFIAB | Lars Filipsson Invest AB | SE | In use | |
| LFP | LÍNEA FIGUERAS PERPIGNAN, S.A. | ES | In use | lfpperthus.com |
| LG | SPAB "Lietuvos Gelezinkeliai" | LT | Revoked | litrail.lt |
| LGAT | Linde Gas GmbH | AT | In use | linde-gas.at |
| LGBG | Linde Gas Bulgaria EOOD | BG | In use | |
| LGD | Linde GmbH Gases Division | DE | In use | linde.com |
| LGGD | Leyrer + Graf Baugesellschaft m.b.H | AT | In use | leyrer-graf.at |
| LGM | LGM Logistikgesellschaft mbH | DE | In use | lgm-bahnlogistik.de |
| LGS | HEAVY MACHINERY SERVICES a.s. | CZ | In use | legios.eu |
| LGSE | Linde Gas AB | SE | In use | linde-gas.se |
| LGSL | Legios Loco a.s. | CZ | In use | |
| LGTRN | LOGITREN FERROVIARIA S.A. | ES | In use | |
| LGYCA | Logyca Ultimo Miglio Ferroviario S.r.l. | IT | In use | logyca.it |
| LHB | Liebherr-Hydraulikbagger GmbH | DE | In use | liebherr.com |
| LHEJL | Lukáš Hejl | CZ | In use | |
| LHS | PKP Linia Hutnicza Szerokotorowa Spólka z.o.o. w Zamosciu | PL | Blocked | |
| LI | Linea S.p.A. | IT | Revoked | lineaferroviaria.it |
| LIBYA | Libya Railways | LY | In use | libyanrailways.com |
| LILO | Linzer Lokalbahn | AT | Revoked | stern-verkehr.at |
| LIN | LINSINGER Maschinenbau GmbH | AT | In use | linsinger.com |
| LINDE | LINDE TECHNOPLYN a.s. | CZ | In use | |
| LINE | Line CNM AB | SE | Revoked | linekontaktledning.com |
| LIO | Liberty Ostrava a.s. | CZ | In use | libertyostrava.cz |
| LIS | Logistic Intermodal Services B.V. | NL | In use | logims.com |
| LIVI | Liikennevirasto | FI | In use | liikennevirasto.fi |
| LJ | Lollandsbanen | DK | In use | lollandsbanen.dk |
| LJM | Landeryds Järnvägsmuseum | SE | In use | landeryd.org |
| LJV | Qvickab AB | SE | In use | |
| LK | Luka Koper, d. d. | SI | In use | luka-kp.si |
| LKA | ŁÓDZKA KOLEJ AGLOMERACYJNA SP. Z O.O. | PL | In use | lka.lodz.pl |
| LKAB | LKAB | SE | In use | lkab.com |
| LKB | Josef Kolvenbach GmbH & CO KG | DE | In use | |
| LKKP | Luka Koper | BG | Revoked | luka-kp.si |
| LKM | Lokomotiva doo | RS | In use | |
| LKO | LKO Teknik AB | SE | In use | |
| LKR | LUKOIL ROMANIA SRL | RO | In use | |
| LM | Lokomotion Gesellschaft für Schienentraktion mbH | DE | In use | lokomotion-rail.de |
| LMCRG | LAUMAR CARGO S. L. | ES | In use | |
| LMF | LMF SAS | FR | In use | |
| LMLUX | LMLux Sarl | LU | In use | |
| LMP | Liebherr Mietpartner GmbH | DE | In use | liebherr.com |
| LMSA | Laurent Membrez SA | CH | In use | membrez.ch |
| LMSTE | Lokalbahn Mixnitz – St. Erhard AG | AT | In use | |
| LMVAB | LMV Kontaktledning AB | SE | In use | kontaktledning.se |
| LN | LeNord S.r.l. | IT | In use | lenord.it |
| LNS | Lineas Group SA/NV | BE | In use | lineas.net |
| LNVG | Landesnahverkehrsgesellschaft Niedersachsen mbH | DE | In use | lnvg.de |
| LNVV | Landi Nord Vaudois-Venoge SA | CH | In use | landinordvaudoisvenoge.ch/ |
| LO | Métro Lausanne-Ouchy SA | CH | Revoked | |
| LOC | LoConnect GmbH | DE | In use | loconnect.eu |
| LOCD | Locomore GmbH & Co. KG | AT | In use | locomore.com |
| LOCON | LOCON Logistik & Consulting AG | DE | In use | locon.de |
| LOG | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com |
| LOGIN | Login Berufsbildung | CH | In use | login.ch |
| LOGR | Lokálka Group, o.s. | CZ | In use | lokalkagroup.cz |
| LOGS | Logistik Service GmbH | AT | In use | logserv.at |
| LOGT | LOGTRAR SRL | RO | In use | |
| LOGWI | Logistik Wiesböck GmbH | DE | In use | logistik-wiesboeck.de |
| LOK | LOK-SERWIS Krystian Stróżyk | PL | In use | |
| LOKAL | UEF Lokalbahn Amstetten-Gerstetten e.V. | DE | In use | uef-lokalbahn.de |
| LOKO | Loko Trans BG OOD / Локо Транс БГ ООД | BG | In use | |
| LOKOM | Przedsiębiorstwo Handlowo-Usługowe LOKOM – TOR Mariusz Król | PL | In use | lokomtor.pl |
| LOKSK | LOK RAIL s.r.o. | SK | In use | |
| LOKTM | Lokteam-Verein zur Erhaltung und Betrieb des Dampftriebfahrzeuges 52.4984 | AT | In use | lokteam.at |
| LOLLO | Mietlok | DE | In use | mietlok.de |
| LOMI | London Midland | UK | In use | londonmidland.com |
| LOMO | LOKO-MOTIV, z.s. | CZ | In use | loko-motiv.cz |
| LONZA | Lonza AG | CH | In use | lonza.com |
| LORRY | Lorry-Rail s.a. | LU | In use | lorry-rail.com |
| LOSTR | LOSTR a.s. | CZ | Revoked | |
| LOTOS | LOTOS Kolej Sp. z o.o. | PL | In use | |
| LOTR | LOTRAS S.R.L. | FR | In use | |
| LOZYW | LOZYW SPÓŁKA Z O.O. | PL | In use | |
| LP | Lok-Partner Betriebsgesellschaft mbH & Co. KG | DE | In use | lok-partner.de |
| LPAG | LokPool AG | CH | In use | lokpool.ch |
| LPG | Locomotives Pool GmbH | DE | In use | locomotives-pool.com |
| LPR | LokoPro s.r.o. | CZ | In use | |
| LPTAB | Logent Terminal AB | SE | In use | longent.se |
| LPZ | Lipsia Erlebnisreisen GmbH | DE | In use | lipsia-erlebnisreisen.de |
| LR | LokRapid | DE | In use | lokrapid.de |
| LRL | LOKORAIL, a.s. | SK | In use | lokorail.sk |
| LRS | LRS Leipzig Rail Service GmbH | DE | In use | |
| LS | L&S Luddeneit und Scherf GmbH | DE | In use | l-und-s.de |
| LSB | LSB Lok Service Balmer AG | CH | In use | lsbag.ch |
| LSD | LOGISTIC SERVICES DANUBIUS S.R.L. | RO | In use | |
| LSDB | DB Schenker Rail Bulgaria | BG | Revoked | |
| LSL | Leiteritz ServiceLogistic UG (haftungsbeschränkt) | DE | In use | leiteritz-servicelogistik.de |
| LSLSP | Leasing Slovenskej sporitelne, a.s. | SK | In use | leasingslsp.sk |
| LSR | Loacker Swiss Recycling AG | CH | In use | loacker.ch |
| LTAB | Landeryds Trafik AB | SE | In use | lt-ab.se |
| LTB | LOKO TRANS s.r.o. | CZ | In use | lokotrans.cz |
| LTBCZ | LOKO TRANS s.r.o. - organinisačná zloška | SK | In use | lokotransslovakia.sk |
| LTBTT | Logistik-Transporte-Bahr GmbH & Co. KG | DE | In use | lt-bahr.de |
| LTC | Logistic & Transport Company sp. z o.o. | PL | In use | |
| LTCMZ | LOKO - CMZ, s. r. o. | SK | In use | |
| LTE | LTE Logistik und Transport GmbH | AT | In use | lte-group.eu |
| LTEAT | LTE Austria GmbH | AT | In use | lte-group.eu |
| LTEHU | LTE Hungária Vasúti Árufuvarozó és Logisztikai Kft. | HU | In use | lte-group.eu |
| LTEPL | LTE Polska sp. z o.o. | PL | In use | lte-group.eu |
| LTERO | LTE-RAIL ROMANIA SRL | RO | In use | lte.at/en/LTE/LTE-RO46.html |
| LTESK | LTE Logistik a Transport Slovakia, s.r.o. | SK | In use | lte.at |
| LTEU | Loko Train s.r.o. | CZ | In use | lokotrain.eu |
| LTF | LOGISTICA Y TRANSPORTE FERROVIARIO, SAU | ES | In use | |
| LTFBG | LO.TRA.FER. -LOGISTICA TRANSPORTI FERROVIARI-s.r.l. | IT | In use | lotrafer.it |
| LTG | AB „LTG CARGO" | LT | In use | litrail.lt |
| LTGPL | LTG CARGO Polska sp. z o.o. | PL | In use | ltgcargo.pl |
| LTL | LTL GmbH | DE | In use | |
| LTS | LOKO TRANS | SK | In use | lokotransslovakia.sk |
| LTSA | La Traction SA | CH | In use | la-traction.ch |
| LTSB | LOKOTRANS SERVIS s.r.o. | CZ | In use | |
| LTSL | LTS Logistik, s.r.o. | SK | In use | |
| LUE | Lühring GmbH | DE | In use | luehring-baggerunternehmen.de |
| LUGO | LUGO TERMINAL S.P.A. | IT | In use | lugoterminal.com |
| LUKBG | Лукойл България ЕООД | BG | In use | lukoil.bg |
| LUKo | Neftohimtrejn | BG | In use | |
| LUMAC | Lumac s.a. | ES | In use | lumac.es |
| LUNDW | Laeger & Wöstenhöfer GmbH & Co. KG | DE | In use | lundw-privatbahn.de |
| LUTRA | LUTRA GMBH- Mittelbrandenburgische Hafengesellschaft | DE | In use | hafenkw.de |
| LUTT | LUTTERODT, Gleis- und Tiefbau | DE | In use | |
| LUTZ | Gebr. Lutz Bauunternehmung GmbH & Co. KG | DE | In use | gebr-lutz.de |
| LUW | Laeger & Wöstenhöfer GmbH & Co. KG | DE | In use | lundw-privatbahn.de |
| LVCH | Lovochemie, a.s. | CZ | In use | |
| LVE | Lokalbahn Lambach - Vorchdorf=Eggenberg | AT | Revoked | stern-verkehr.at |
| LVT | Konigs Wuserhausen Mittenwalde Töpchiner Kleinbahn GmbH | DE | In use | |
| LW | Förderverein Berlin-Anhaltiche Eisenbahn e.V | DE | In use | eisenbahnverein-wittenberg.de |
| LWB | Lappwaldbahn | DE | In use | lappwaldbahn.de |
| LWC | LWC Lappwaldbahn Cargo GmbH | DE | In use | lappwaldbahn.de |
| LWRTE | LEONHARD WEISS RTE AS | EE | In use | leonhard-weiss.com |
| LWS | LWS Lappwaldbahn Service GmbH | DE | In use | lappwaldbahn.de |
| LWZ | LWZ Sp. z o.o. | PL | In use | |
| LZC | Lead & Zinc Complex PLC / Оловно цинков комплекс | BG | In use | |
| LZK | Letohradský železnični klub z.s. | CZ | In use | lzkclub.estranky.cz |
| MAASG | GBM Gleisbau Maas GmbH | DE | In use | maasbau.de |
| MABS | Museumseisenbahn Ammerland-Barßel-Saterland e.V. | DE | In use | mabs-online.de |
| MAED | Maik AMPFT Eisenbahndienstleistungen | DE | In use | |
| MAGIT | Liberty Magona srl | IT | In use | libertysteelgroup.com |
| MAIA | MAIA RAIL | FR | In use | maia-rail.groupe-maia.com |
| MAKI | Makies AG | CH | In use | makies.ch |
| MALOW | MaLoWa Bahnwerkstatt GmbH | DE | In use | |
| MALP | MALPENSA S.R.L. | RO | In use | malpensa.ro |
| MALUS | Malus Aps | DK | In use | malus.dk |
| MANA | Máňa doprava s.r.o. | CZ | In use | |
| MANTI | MANTI KO OOD | BG | In use | |
| MAPN | MApN - Unitatea Militara 02574 Bucuresti | RO | In use | |
| MAR | Trafikverket Materialservice Rälsverkstaden | SE | In use | trafikverket.se |
| MARK | W. Markgraf GmbH & Co KG Bauunternehmung | DE | In use | markgraf-bau.de |
| MARS | MARS LOGISTICS Uluslararası Taşımacılık Depolama VE Tic Aş. | TR | In use | marslogistics.com |
| MARTI | Marti Infra AG | CH | In use | martiagh.ch |
| MARUB | MARUB SA | RO | In use | marub.ro |
| MARW | MARWAY FERTILCHIM SA | RO | In use | |
| MAS | MaS Bahnconsult Martin Stams | DE | In use | mas-bahnconsult.de |
| MASK | Max Aicher Slovakia s.r.o. | SK | In use | |
| MAST | Martin Schienentechnik KEG | AT | In use | martin-schienentechnik.com |
| MAT | Messer Austria GmbH | AT | In use | messer.at |
| MATIS | MATISA Matériel Industriel SA | CH | In use | matisa.ch |
| MATIT | Matisa S.p.A | IT | In use | matisa.ch |
| MATT | Matthäi Trimodalbau GmbH & Co. KG | DE | In use | matthaei.de |
| MAV | Magyar Államvasutak ZRt. | HU | In use | mav.hu |
| MAVGS | MÁV-GÉPÉsZet Zrt. | HU | In use | mav-gepeszet.hu |
| MAVRT | MÁV Rail Tours Kft. | HU | In use | mavcsoport.hu |
| MAVTR | MÁV-TRAKCIÓ Zrt. (MAV-TRACTION Co) | HU | In use | mav-trakcio.hu |
| MAX | MAVEX-REKORD Kft. | HU | In use | |
| MAXKK | Maxima Kustusz Kyrcz Spółka Jawna | PL | In use | maxima-service.eu |
| MAY | Maybach Stammhaus GmbH | DE | Revoked | maybach.org |
| MAZZI | Angelo Mazzi Costruzioni Generali e Ferroviarie SRL | IT | In use | |
| MB | Mansfelder Bergwegsbahn e.V | DE | In use | bergwerksbahn.de |
| MBAG | Mercedes-Benz AG | DE | In use | group.mercedes-benz.com |
| MBB | Mecklenburgische Bäderbahn Molli | DE | In use | molli-bahn.de |
| MBBAU | MB Bau und Sicherungsüberwachung e.K. | DE | In use | |
| MBBB | Museumsbahn Bremerhaven-Bederkesa e. V. | DE | In use | museumsbahn-bremerhaven-bederkesa.de |
| MBBKB | Museumsbahn Buckower Kleinbahn e.V. | DE | In use | buckower-kleinbahn.de |
| MBC | Transports de la région Morges-Bière-Cossonay | CH | In use | mbc.ch |
| MBG | Muggenthaler Bau GmbH | DE | In use | muggenthaler-bau.de |
| MBI | Münzer Bioindustrie GmbH | AT | In use | |
| MBM | MBM Maas Baumaschinen GmbH & Co. KG | DE | In use | maas-tiefbau.de |
| MBMR | MBM rail s.r.o. | CZ | In use | mbmr.cz |
| MBR | mb-railtech | DE | In use | mb-railtech.de |
| MBS | Montafonerbahn AG | AT | In use | montafonerbahn.at |
| MBSG | Günter Theis und Thomas Kaiser GbR | DE | In use | |
| MBV | Malmbanans Vänner | SE | In use | nbjvm.se |
| MBVA | Flecken Bruchhausen-Vilsen | DE | In use | |
| MBZS | MLADOBOLESLAVSKÝ ŽELEZNIČNÍ SPOLEK | CZ | In use | mbzs.net |
| MCT | MECHEL CAMPIA TURZII SA | RO | In use | remat-mg.ro |
| MDCIV | Tecklenborg GmbH & Co. KG | DE | In use | tecklenborg.de |
| MDE | MANTENIMIENTO DE ESTACIONES, S.L. | ES | In use | mdeconstrucciones.es |
| MDEF | Ministerio de Defensa - DISAR | ES | In use | |
| MDLOG | MEDLOG LOJİSTİK GEMİCİLİK VE TURİZM A.Ş. | TR | In use | medlog.com.tr |
| MDM | Eiffage Infra-Lärmschutz GmbH | DE | Revoked | |
| MDV | Meininger Dampflok Verein e.V. | DE | In use | meininger-dampflokverein.de |
| MDW | MEDWAY ITALIA SRL | IT | In use | |
| ME | metronom Eisenbahngesellschaft mbH | DE | In use | der-metronom.de |
| MEB | MEB -Bahndienstleistungen GmbH | DE | In use | meb-bahndienstleistungen.de |
| MEBMD | MEB-BAHNDIENSTLEISTUNGEN Gmbh | DE | In use | meb-bahndienstleistungen.de |
| MEBRO | Mebro Bau- und Industrieservice GmbH | DE | In use | mebro.de |
| MECCO | MECCOLI | FR | In use | meccoli.fr |
| MECDV | MECANO SERV SRL | RO | In use | |
| MECHA | MONTAJES ELÉCTRICOS CHAMORRO, S.A. | ES | In use | mechamorro.com |
| MECNO | Mecno Service Srl | IT | In use | mecnoservice.com |
| MED | MEDWAY - Operador Ferroviário e Logistico de Mercadorias, SA | PT | In use | medway-logistics.com |
| MEFRV | Mota-Engil Railways Engineering, S.A. | PT | Revoked | mota-engil.pt |
| MEG | Mitteldeutsche Eisenbahn GmbH | DE | In use | meg-bahn.de |
| MEGAL | Leszek Tajer P.H.U. MEGALIFT | PL | In use | megalift.pl |
| MEGAM | Mega-Met sp. z o.o. | PL | In use | mega-met.pl |
| MEH | Museumseisenbahn Hamm | DE | In use | |
| MEIG | Mitteldeutsche Eisenbahninfrastrukturgesellschaft mbH | DE | In use | |
| MEJA | Meier + Jäggi AG | CH | In use | m-j.ch |
| MEK | M. E. K. Mitteldeutsche Elektro- und Kabeltiefbau GmbH | DE | In use | mek-le.de |
| MEL | Museums-Eisenbahn-Club Losheim | DE | In use | |
| MELVI | MONTAJES ELECTRICOS VINAELECTRIC, S.L. | ES | In use | vinaelectric.es |
| MEM | Museums-Eisenbahn Minden e.V | DE | In use | museumseisenbahn-minden.de |
| MER | Macquarie European Rail Limited (Luxembourg Branch) | LU | Revoked | macquarierail.com |
| MERL | Macquarie European Rail Limited | UK | In use | macquarierail.com |
| MERLW | Mota-Engil Railways Engineering, S.A. | PT | In use | mota-engil.pt |
| MERTZ | Mertzmix mbH & Co. KG | DE | In use | mertzkies.de |
| MES | Michael Erhard | DE | In use | |
| MESEA | MESEA | FR | In use | mesea.fr |
| MET | metronom Eisenbahngesellschaft mbH | DE | Revoked | der-metronom.de |
| META | Metzger & Co GmbH | AT | Revoked | |
| METG | Waggonges. Robert Metzger & Co GmbH | DE | In use | |
| METRA | Metrag AG (Sersa Group) | CH | Revoked | |
| METRO | Metro Service A/S | DK | In use | metroservice.dk |
| METSA | Metsä Tissue AB | SE | In use | metsagroup.com |
| MEV | Museumsbahn e.V. | DE | In use | bahnwelt.de |
| MEVA | MEVA S.A. | RO | In use | meva.ro |
| MEVG | Mitteldeuche Esenbahn Verkehrsgesellschaft mbH | DE | In use | |
| MFAG | Müller Gleisbau AG | CH | In use | mueller-gleisbau.ch |
| MFDR | MFD Rail GmbH | CH | In use | mfdrail.ch |
| MFERS | M. FERRICOS9, S.L. | ES | In use | mferricos9sl.com |
| MFI | M.F.I | FR | In use | |
| MFOSJ | Museiföreningen Östra Skånes Järnvägar | SE | In use | mfosj.se |
| MFPN | Matériel Ferroviaire Patrimoine National | FR | In use | mfpn.fr |
| MG | Ferrovia Monte Generoso SA | CH | In use | montegeneroso.ch |
| MGB | Matterhorn Gotthard Bahn Verkehrs AG | CH | In use | mgbahn.ch |
| MGBG | „EC EHД ЕC - ЕМ ДЖИ” ЕООД | BG | In use | |
| MGLGS | MAIRON GALATI SA | RO | In use | rcelormittal.com |
| MGP | MÁV Vasútépítő - Gépellátó és Szolgáltató Kft. | HU | In use | |
| MGRL | Meridian Generic Rail Limited | UK | In use | mgrl.co.uk |
| MGW | mgw Service GmbH & Co. KG | DE | In use | mgwservice.de |
| MGWB | MGW Gleis- und Weichenbau-Gesellschaft mbH & Co. KG | DE | In use | mgw-berlin.de |
| MH | Museumseisenbahn Hanau e.V. | DE | In use | museumseisenbahn-hanau.de |
| MHB | Magdebburg-Hannover Baugeselischaft mbH | DE | In use | mhb-net.de |
| MHEL | MHEL Müchelner Hoch-, Erd- und Leitungsbau GmbH | DE | In use | mhel.eu |
| MHEV | MÁV-HÉV Helyiérdekű Vasút Zártkörűen Működő Részvénytársaság | HU | In use | mav-hev.hu |
| MHG | TRANSPORTWERK Magdeburger Hafen GmbH | DE | In use | magdeburg-hafen-gvz.eu |
| MHP | MHP TRADE B.V. | NL | In use | |
| MHVG | MülheimerVerkersgesellschaft mbH | DE | In use | muelheimer-verkehrsgesellschaft.de |
| MI | MIBRAG | DE | In use | mibrag.de |
| MIB | Kraftwerk Oberhasli (Meiringen-Innertkirchen-Bahn) | CH | In use | grimselstrom.ch/Angebote/mib |
| MIC | Michels GmbH & Co. KG | DE | In use | michels-online.de |
| MICOS | MICOS S.P.A. | IT | In use | micosspa.it |
| MIDC | MidCargo AB | SE | Revoked | midcargo.se |
| MIGRO | Migro sp. z o.o. | PL | In use | |
| MIKRS | MIKRON´S Mikronize Mineral Indüstrisi Tic. A.Ş. | TR | In use | mikrons.com.tr |
| MIL | Milsped GmbH | DE | In use | milsped.com |
| MILLS | Roland Mills GmbH Co. KG | DE | In use | rolandmillsunited.de |
| MIR | Mercitalia Rail S.r.l. | IT | In use | |
| MIRAL | MI-RAILWAY | PL | In use | mi-railway.pl |
| MIS | SILVANIA INTERNATIONAL PROD. SRL | RO | In use | misgrup.ro |
| MISA | Millet SAS | FR | In use | |
| MIST | Mercitalia Shunting & Terminal S.r.l. | IT | In use | mercitaliashuntingandterminal.it |
| MIT | MERCITALIA TERMINAL SPA | IT | In use | mercitaliaterminal.it |
| MITL | Majestic Imperator Train de Luxe Waggon Charter GmbH | AT | In use | imperialtrain.com |
| MITRA | Mitrag AG | CH | In use | mitrag.ch |
| MJ | Museiföreningen Munkedals Jernväg | SE | In use | munkedalsjernvag.com |
| MJA | Markus Johannes Amrein | CH | In use | ew-nostalgie.ch/Daten |
| MJBA | Midtjyske jernbaner A/S | DK | In use | |
| MJBAD | Midtjyske Jernbaner Drift A/S | DK | In use | |
| MK | MK-RAIL Mateusz Kędziak | PL | In use | |
| MKB | Mindener Kreisbahnen | DE | In use | mkb.de |
| MKBB | AG Märkische Kleinbahn e.V. | DE | In use | mkb-berlin.de |
| MKERT | MÁV KERT Kft. | HU | In use | |
| MKO | Museumseisenbahn Küstenbahn Ostfriesland e.V. | DE | In use | mkoev.de |
| MKT | Majkoltrans Sp. Z o.o. | PL | In use | majkoltrans.pl |
| MLBYD | P.W. M&L Roman Mierzbiczak | PL | In use | |
| MLJ | Malmö-Limhamns Järnväg | SE | In use | cementa.se |
| MLS | Mobil Lok Servis sp. z o.o. | PL | In use | mobills.eu |
| MLV | Martinsberger Lokalbahnverein | AT | In use | lokalbahnverein.at |
| MM | Mermec S.p.A. sivuliike Suomessa | FI | In use | mermecgroup.com |
| MMIRL | Mini Maritza-Iztok EAD / Мини Марица-Изток ЕАД | BG | In use | marica-iztok.com |
| MML | Midland Main Line | UK | Blocked | midlandmainline.com |
| MMR | MMRailservice GmbH | DE | In use | |
| MMV | Magyar Magánvasút ZRt. | HU | In use | mmv.hu |
| MMVRO | MMV RAIL ROMANIA SA | RO | In use | mmvrail.ro |
| MNDL | MONDIAL SA | RO | In use | |
| MNOS | MÁV Nosztalgia Kft. | HU | In use | mavnosztalgia.hu |
| MNZ | MONZAS, spol. s r.o. | CZ | In use | monzas.cz |
| MOB | Compagnie du Chemins de fer Montreux-Oberland bernois | CH | In use | mob.ch |
| MOFR | MONFER France S.A. | FR | In use | |
| MOL | MOL Hungarian Oil and Gas Company | HU | In use | mol.hu |
| MOLCY | MOL CY NV | BE | In use | molcy.com |
| MOLI | Molinari Rail Deutschland GmbH | DE | In use | molinari-rail.com |
| MONDI | Mondi Stamboliiski | BG | In use | mondigroup.com |
| MONF | MONFER S.p.A. | IT | In use | monfer.net |
| MONSA | MONDI ŚWIECIE S.A. | PL | In use | mondigroup.com |
| MONTI | Monti GmbH | DE | In use | monti-bau.de |
| MORIS | MORIS s.r.o. | SK | In use | moris.com.pl |
| MORVI | Morvi Sp. Z o.o. | DE | In use | |
| MOS | Mosolf Automotive Railway GmbH | DE | In use | mosolf.de |
| MOTAB | Motala Train AB | SE | Revoked | motalatrain.se |
| MOVO | MOVO spol. s r.o. | CZ | In use | |
| MOZ | Moravská železnični s.r.o. | CZ | In use | moravskazeleznicni.cz |
| MP | Petr Majernik | CZ | In use | t211.cz |
| MPF | MIPAF, s.r.o. | CZ | In use | mipaf.cz |
| MPKIS | Muzeum Przemysłu i Kolejnictwa na Śląsku | PL | In use | muzeatechniki.pl |
| MPL | MORIS Sp. z o.o. | PL | In use | moris.com.pl |
| MR | Metroferro Roma ("Met.Ro.") | IT | Blocked | atac.roma.it |
| MRE | Merseyrail Electrics 2002 Ltd | UK | In use | merseyrail.org |
| MREC | MÁV-REC Kft. | HU | In use | mavrec.hu |
| MRG | Martin Rose Gleisbau | DE | In use | rose-gleisbau.de |
| MRL | Mendip Rail Limited | UK | In use | |
| MROSE | Martin Rose GmbH & Co.KG | DE | In use | |
| MRPK | Wytwórnia Uszczelek „MORPAK” Paweł Jaworski | PL | In use | morpak.pl |
| MRS | Mobile Rail Service GmbH | DE | In use | mobite-railservise.com |
| MRU | Museumseisenbahn Rahden-Uchte e.V. | DE | In use | |
| MSK | Metanolsko sirćetni kompleks a.d. Kikinda | RS | In use | msk.co.rs |
| MSM | European Train Company BV | NL | In use | |
| MSO | Mittal Steel Ostrava a.s. | CZ | Revoked | |
| MSSA | MSSA S.A.S | FR | In use | metauxspeciaux.fr |
| MST | Martin Steinbrecher GmbH | DE | In use | steinbrecher-gmbh.de |
| MSV | Michel Spezialtief- und Verkehrsbau GmbH | DE | In use | |
| MT | METRANS, a.s. | CZ | In use | |
| MTAB | LKAB Malmtrafik AB | SE | In use | lkab.com. |
| MTAS | Malmtrafik A/S | NO | Revoked | lkab.com |
| MTB | Förderverein für die Müglitztalbahn e.V | DE | In use | mueglitztalbahn.de |
| MTBNO | MTB gmbH | DE | In use | mtb-bau.de |
| MTC | MT CARGO SPEDITION | SK | In use | mtcargo.sk |
| MTD | METRANS (Danubia) a.s. | SK | In use | metrans.cz |
| MTEG | Muldental-Eisenbahnverkehrsgesellschaft mbH | DE | In use | mteg.de |
| MTF | MANTENIMIENTO TÉCNICO FERROVIARIO, S.L. | ES | In use | smtf.es |
| MTFR | Metro.ferr srl | IT | In use | metroferr.it |
| MTHB | Verein Historische Mittel-Thurgau-Bahn (MThB) | CH | In use | mthb.ch |
| MTMG | MTMG Zrt. | HU | In use | mtmgzrt.com |
| MTPL | METRANS (Polonia) sp. z o. o. | PL | In use | metrans.eu |
| MTR | METRANS Rail s.r.o. | CZ | In use | metransrail.eu |
| MTRD | METRANS Rail (Deutchland) GmbH | DE | In use | metransrail.eu |
| MTRRS | MERTANS DYKO Rail Repair Shop, s.r.o. | CZ | In use | dyko.cz |
| MTRX | MTR Express (Sweden) AB | SE | In use | mtrexpress.se |
| MTW | MTW Rail AB | SE | In use | mtwrail.com |
| MTXRO | METROREX SA | RO | In use | metrorex.ro |
| MTZ | Mongolian Railways (MTЗ) | MN | In use | mtz.mn |
| MUEC | Modell- und Eisenbahnclub -Rehau e.V | DE | In use | lokschuppen-selb.de |
| MUS | Mostecká uhelná a.s. | CZ | Revoked | |
| MVA | Magyar Vasúti Árúszállító Korlátolt Felelősségű Társaság | HU | In use | mvakft.hu |
| MVB | Migros Verteilbetrieb AG | CH | In use | mvb.ch |
| MVG | Märkische Eisenbahn Gesellschaft, Plettenberg | DE | In use | |
| MVH | Maansiirto Veli Hyyryläinen Oy | FI | In use | mvh.fi |
| MVNAG | Migros Verteilbetrieb AG | CH | Revoked | mvn.ch |
| MVR | Transport Montreux-Vevey-Riviera | CH | In use | mob.ch |
| MVS | Miljø og Veiservice AS | NO | In use | mvs.as |
| MVSFI | Museoveturiseura r.y. | FI | In use | veturimuseo.fi |
| MW | Metro Warszawskie Sp. z o.o. | PL | In use | metro.waw.pl |
| MWAB | Midwaggon AB | SE | In use | midwaggon.se |
| MWB | Mittelweserbahn GmbH | DE | In use | evb-elbe-weser.de |
| MWBRI | Montawerke Brixlegg | AT | In use | montanwerke-brixlegg.com |
| MWRO | MW Romania SA | RO | In use | |
| MXMU | MODALIS | FR | In use | modalis.com |
| MYMA | Myma Invest, s.r.o. | SK | In use | |
| MZ | Makedonske Zelenice | MK | In use | |
| MZE | MZ Eisenbahndienstleistungen | DE | In use | |
| NACCO | NACCO SAS | FR | In use | |
| NAEF | N.A.E.F. Srl | IT | In use | naefsrl.com |
| NAFTA | NAFTA-PETROCHEM | SI | In use | nafta-petrochem.si |
| NAJA | Natrop und Jansen GmbH | DE | In use | |
| NAL | Nagel Baumaschinen Magdeburg GmbH | DE | In use | nagel-gruppe.de |
| NAN | N+N – Konstrukce a dopravní stavby Litoměřice, s.r.o. | CZ | In use | nanlitomerice.cz |
| NAP | Fábrica Nitrato de Amónio de Portugal, S.A. | PT | Revoked | adp-fertilizantes.pt |
| NATRI | NATRIX sp. z o.o. | PL | In use | natrix.pl |
| NAVI | NAVILAND CARGO | FR | In use | naviland-cargo.com |
| NBE | NBE nordbahn Eisenbahngesellschaft mbH & Co. KG | DE | In use | nordbahn.de |
| NBEG | Nordbayerische Eisenbahn GmbH | DE | In use | nbe-group.eu |
| NBEL | NBE Logistik GmbH | DE | Revoked | nbe-logistik.com |
| NBIK | Nostalgiebahnen in Kärnten | AT | In use | nostalgiebahn.at |
| NBN | Niederösterreichische Bahnnostalgie | AT | In use | |
| NBSE | Nebenbahn Staßfurt-Egein e.V. | DE | In use | nebenbahn-stassfurt-egeln.com |
| NBVJ | Nora Bergslags Veteran-Jernväg | SE | In use | nbvj.nu |
| NC | DB Cargo Italia S.r.l. | IT | In use | dbcargo.com |
| NCHZ | FORTISCHEM a.s. | SK | In use | nchz.sk |
| NCOST | Nuove Costruzioni S.r.l. | IT | In use | |
| NCS | DAHER PROJECTS GmbH | DE | In use | daher.com |
| NCV | NCV AG Neue Chemie Versorgung und Vermietung von Eisenbahnwagen | CH | Revoked | |
| NDLNR | Nordliner Gesellschaft für Eisenbahnverkehr mbH | DE | In use | |
| NDLO | Norwegian Defence Logistics Organisation | NO | Revoked | forsvarsmateriell.com |
| NDMA | Forsvarsmateriell (Norwegian Defence Materiel Agency) | NO | In use | forsvarsmateriell.com |
| NE | Neusser Eisenbahn | DE | In use | hafen-neuss.de/eisenbahn/main.html |
| NEB | Niederbarnimer Eisenbahn | DE | In use | neb.de |
| NEBB | NEB Betriebsgesellschaft mbH | DE | In use | neb.de |
| NEBKM | NITROERG S.A. | PL | In use | nitroerg.pl |
| NEG | Norddeutsche Eisenbahn Niebüll GmbH | DE | In use | neg-niebuell.de |
| NEON | Neochim AD / Неохим АД | BG | In use | |
| NES | Netzwerkbahn Sachsen GmbH | DE | In use | netzwerkbahn-sachsen.de |
| NESA | NeSA Eisenbahn-Betriebsgesellschaft Neckar-Schwarzwald-Alb mbH | DE | In use | nesa-bahn.de |
| NETS | NETTUNIA SUD S.r.l. | IT | In use | |
| NEWAG | NEWAG Spółka Akcyjna | PL | In use | newag.pl |
| NFCV | Nadačni fond Český vlak. | CZ | In use | revolutiontrain.com |
| NFG | NFG Bahnservice GmbH | DE | In use | nfg-bahnservice.de |
| NGTS | Niğtaş Mikronize Kalsit Ticaret ve Sanayi Ltd. Şti. | TR | In use | nigtasmikronize.com |
| NHN | NHN spol. s r.o. | CZ | In use | |
| NHT | Neftekhimtrans - Société russe Neftekhimtrans, Entreprise d’Etat | RU | In use | gpnht.ru |
| NHTR | NH-TRANS, SE | CZ | In use | nh-trans.cz |
| NI | Nibler GmbH Fernleitungsbau | DE | In use | nibler.de |
| NIAG | Niederrheinische Verkehrsbetriebe AG NIAG | DE | In use | niag-online.de |
| NIR | Northern Ireland Railways Company Limited | UK | Blocked | nirailways.co.uk |
| NIRO | NiRoVe GmbH | DE | In use | nirove.de |
| NIRS | N1 Rail Services Süd GmbH | DE | In use | n1-rail.com |
| NIS | NIS a.d. Narodnog fronta 12, Novi Sad | RS | In use | nis.eu |
| NITRA | POPASUL TREBES SRL | RO | In use | |
| NITRO | Zakłady Chemiczne “NITRO-CHEM” S.A. | PL | In use | nitrochem.com.pl |
| NJ | Nässjö Järnvägsmuseum | SE | In use | lokstallet.se |
| NJA | Stiftelsen Norsk Jernbanearv | NO | In use | |
| NJD | Norsk Jernbanedrift AS | NO | In use | njd.no |
| NJDM | NJD Maskin AS | NO | In use | njd.no |
| NJDR | NJD Railvac AS | NO | In use | njd.no |
| NJJ | Nordjyske Jernbaner | DK | In use | njba.dk |
| NJM | Nynäshamns Järnvägsmuseum | SE | In use | njm.nu |
| NK | Nordkalk AB | SE | In use | nordkalk.com |
| NKG | NEWAG KG Bahntechnik | DE | In use | |
| NKN | NKN Usługi Kolejowe Sp. z o.o. | PL | In use | nkn.com.pl |
| NKPL | Nordkalk Sp. z o.o. | PL | In use | nordkalk.pl |
| NLB | Verein Neue Landesbahn | AT | In use | landesbahn.at |
| NLEF | DBV Förderverein Niederlausitzer Eisenbahn e.V. | DE | In use | nlef.de |
| NLNSM | Stichting Nederlands Spoorwegmuseum | NL | In use | spoorwegmuseum.nl |
| NLPB | Nationalparkbahn Hunsrück-Hochwald UG (haftungsbeschränkt) | DE | In use | |
| NLTEE | Stichting TEE Nederland | NL | In use | stichtingtee.nl |
| NMBS | Nationale Maatschappij van Belgische Spoorwegen | BE | In use | nmbs.be |
| NME | Neukölln-Mittenwalder Eisenbahn-Gesellschaft | DE | In use | neukoelln-mittenwalder-eisenbahn.de |
| NMNV | NMN Hoch und Tiefbau GmbH | DE | In use | nmn-gmbh.de |
| NMT | Norsk Museumstog | NO | In use | njk.no/norsk-museumstog-dekker-hele-landet |
| NNH | Norilsk Nickel Harjavalta Oy | FI | In use | nornik.fi |
| NOB | Nord-Ostsee-Bahn | DE | In use | nord-ostsee-bahn.de |
| NOBEG | NOBEG - Reinold | DE | In use | |
| NOE | Orient Express | FR | In use | orient-express.com |
| NOKTA | NOKTA RAIL ULUSLAR ARASI TAŞIMACILIK VE TIC. A.Ş. | TR | In use | noktalojistik.com.tr |
| NOPAS | Novopacký parostrojní spolek | CZ | In use | nps.one |
| NOR | Norske Tog AS | NO | In use | norsketog.no |
| NORCM | NORCEM AS | NO | In use | norcem.no |
| NORDI | NORDIGAS, a.s. | CZ | In use | |
| NORTH | Northland Logistics AB | SE | In use | northland.eu |
| NOSBB | Niederösterreichische Schneebergbahn GmbH | AT | In use | schneebergbahn.at |
| NOSTA | NOSTA Niederösterreichische Außenhandelsgesellschaft mbH | AT | In use | |
| NOTAR | Impresa Luigi Notari S.p.A. | IT | In use | impresaluiginotari.com |
| NOTR | Nordic Train AB | SE | In use | vida.se |
| NOVA | NOVATRANS | FR | In use | novatrans.eu |
| NOVAC | Novacarb | FR | In use | novacap.fr |
| NOVAL | NOVA Leasing a.s. | SK | In use | novaleasing.sk |
| NOVES | Novesia Mineralölhandelsges. mbH | DE | In use | |
| NOVOG | Niederösterreichische Verkehrsorganisationsgesellschaft mbH | AT | In use | noevog.at |
| NOWRE | NOWREM sp. j. G. Iwański, D. Łata | PL | In use | nowrem.pl |
| NP | NUOVI PROGETTI SRL | IT | In use | nuoviprogettisrl.it |
| NPG | NPG Bau Neuschitzer GmbH & Co KG | AT | In use | |
| NPL | Neopul - Sociedade de Estudos e Construção, S.A. | PT | In use | neopul.pt |
| NPS | Nordic Paper Seffle AB | SE | In use | nordic-paper.com |
| NPZ | Verein MThB-NPZ | CH | In use | mthb-npz.ch |
| NR | NetRail AB | SE | In use | netrail.se |
| NRAIL | Northrail Fahrzeugverwaltung GmbH | DE | In use | northrail.eu |
| NRCFI | NRC Group Finland Oy | FI | In use | nrcgroup.fi |
| NRCM | NRC Bane AS | NO | In use | nrcgroup.com |
| NRCS | Nordic Railway Construction Sverige AB | SE | In use | nrcgroup.se |
| NRE | Verein Nostalgie Rhein Express (NRE) | CH | In use | nostalgie-rhein-express.ch |
| NREC | Nossen-Riesaer Eisenbahn-Compagnie (NRE) GmbH | DE | In use | nre-compagnie.de |
| NRFAB | Nordic Re-Finance AB | SE | In use | nordicrefinance.se |
| NRIC | National railway infrastructure company / Национална компания "Железопътна инфраструктура" | BG | In use | rail-infra.bg |
| NRIL | Network Rail | UK | In use | networkrail.co.uk |
| NRS | Nordic Rail Service GmbH | DE | In use | nordic-rail-service.de |
| NRSLH | Normandie Rail Services SAS | FR | In use | |
| NS | N.V. Nederlandse Spoorwegen | NL | In use | ns.nl |
| NSB | Norges Statsbaner BA | NO | Revoked | nsb.no |
| NSBAG | Neusiedler Seebahn | AT | Revoked | nsb-ag.at |
| NSOLM | Nuova Solmine S.p.A. | IT | In use | |
| NSTCM | Compagnie du chemin de fer Nyon-St-Cergue-Morez | CH | In use | -- |
| NT | Nedtrain | NL | In use | nedtrain.nl |
| NTA | Norsk Transport AS | NO | In use | |
| NTAB | Nordiska Tåg AB | SE | In use | |
| NTARI | NOTARI S.R.L. | IT | In use | |
| NTB | Nassauische Touristik-Bahn e.V | DE | In use | aartalbahn.de |
| NTG | NTG Bau GmbH | DE | In use | ntg-bau.de |
| NTM | Národní technické muzeum (NTM) | CZ | In use | ntm.cz |
| NTP | NITROPOROS SRL | RO | In use | |
| NTS | Northrail technical service GmbH &Co. KA | DE | In use | northrail.eu |
| NTSAB | Nordic Tamping Service AB | SE | In use | nts-ab.se |
| NTV | Nuovo Transporto Viaggiatori S.p.A. ''NTV'' | IT | In use | ntvspa.it |
| NU | Faik Nuhaj Industriedienstungen | DE | In use | |
| NVM | NOVOMETAL DOO NOVI SAD | RS | In use | novometaldoo.com |
| NWB | NordWestBahn GmbH | DE | In use | nordwestbahn.de |
| NWC | NordWestCargo GmbH | DE | In use | nordwestcargo.de |
| NWN | NETINERA WERKE GmbH | DE | In use | netinera-werke.de |
| NWP | Lokalbahn Neuenmarkt-Waizenkirchen-Peuerbach | AT | Revoked | stern-verkehr.at |
| NX | National Express | UK | Blocked | nationalexpressgroup.com |
| NXG | National Express Rail GmbH | DE | In use | nationalexpress.de |
| NXRL | Nexrail AssetCo S.a.r.l. | LU | In use | nexrail.lease |
| NZTK | Nadwiślański Zakład Transportu Kolejowego Sp. z o.o. | PL | Revoked | |
| OBAS | Ofotbanen | NO | In use | ofotbanen.no |
| OBB | Österreichische Bundesbahnen | AT | In use | oebb.at |
| OBEV | Osning-Bahn e.V. | DE | In use | osningbahn.de |
| OBJ | Ohs Bruks Järnvägs museiförening | SE | In use | ohsabanan.com |
| OBL | OBL LOGISTIC DOO | RS | In use | |
| OBROK | OBROKA UG (haftungsabeschränkt) | DE | In use | |
| OC | Société du chemin de fer Orbe-Chavornay SA | CH | Revoked | uo-oc.ch/orberail.html |
| OCG | Oceanogate Italia SPA | IT | In use | |
| OCK | Fidum Bau AG | DE | In use | |
| OCRI | Oak Capital Rail Invest GmbH | DE | In use | oak-capital.de |
| OCRM | Oak Capital Rail Management GmbH | DE | In use | oak-capital.de |
| OCTOP | OCTOPUS Rijeka d.o.o. | HZ | In use | octopus.hr |
| OCTOS | OКТОПOД С | BG | In use | |
| OCVIA | OC'VIA Maintenance | FR | In use | ocvia.fr |
| OD | Oftobanen Drift AS | NO | In use | oftobanen.no |
| ODC | Ostravská dopravni společnost - Cargo, a.s. | CZ | In use | odos-cargo.cz |
| ODEG | ODEG Ostdeutsche Eisenbahn GmbH | DE | In use | odeg.de |
| ODF | Osnabrücker Dampflokfreunde e.V | DE | In use | osnabruecker-dampflokfreunde.de |
| ODIN | ODIN Logistics AG | DE | In use | railwagon-rentpool.eu |
| ODOS | OSTRAVSKA DOPRAVNI SPOLEČNOST, a.s. | CZ | In use | odos.cz |
| OEBB | Oensingen-Balsthal-Bahn | CH | In use | oebb.ch |
| OEF | Oberhessische Eisenbahnfreunde e.V. | DE | In use | oef-online.de |
| OEGIE | Stiftung BSW, Oberhessische Eisenbahnfreunde Gießen | DE | In use | |
| OFPSO | OFP-SUD OUEST | FR | In use | |
| OFR | OFFROY | FR | In use | tso.fr\offroy.asp |
| OFZ | OFZ, a.s. | SK | In use | |
| OGEG | Österreichische Gesellschaft für Eisenbahngeschichte (ÖGEG) | AT | In use | oegeg.at |
| OHE | Osthannorversche Eisenbahnen AG | DE | In use | ohe-ag.de |
| OHEGO | OHE Cargo GmbH | DE | In use | one-cargo.de |
| OILBG | Ойл ЕООД | BG | In use | |
| OILCO | OILCO KDA Skopie, R Macedonia | BG | In use | oilco.com.mk |
| OINS | Avirunion, a.s., závod Nové Sedlo | CZ | In use | |
| OIRH | Avirunion, a.s., závod Rudolfova huť | CZ | In use | |
| OJF | Orsa Jernvägsförening | SE | In use | orsajf.se |
| OJS | Museiföreningen Örnsköldsviks JärnvägsSällskap | SE | In use | ojs.nu |
| OKB | Sällskapet Ostkustbanans vänner | SE | In use | web.telia.com/~u26608499/index.htm |
| OKDD | OKD, Doprava, a.s. | CZ | Revoked | |
| OKTAN | Arcturus-Bunker sp. z o.o. | PL | In use | arcturus-bunker.pl |
| OKTO | Outokumpu Stainless Oy | FI | In use | outokumpu.com |
| OKVMT | OKV, spol. s r.o. | SK | In use | okvmartin.sk |
| OKWBG | ÖKOMBI GmbH | AT | In use | oekombi.at |
| OLA | Ostseeland Verkehr GmbH | DE | In use | ostseelandverkehr.de |
| OLAV | OLAVION sp. z o. o. | PL | In use | olavion.pl |
| OLDOP | OLOMOUCKÁ DOPRAVNI s.r.o. | CZ | In use | |
| OLI | OLICHON | FR | In use | olichon.fr |
| OLIVA | ОЛИВА АД / OLIVA AD | BG | In use | oliva.bg |
| OLKOL | ZNTK OLEŚNICA S.A. | PL | In use | zntkolesnica.com.pl |
| OLMET | OLMET SPÓŁKA Z OGRANICZONA ODPOWIEDZIALNOŚCIĄ SP. K. | PL | In use | olmet.pl |
| OLPP | OPERATOR LOGISTYCZNY PALIW PŁYNNYCH Sp. z o.o. | PL | In use | olpp.pl |
| OLT | OLTCHIM SA | RO | In use | oltchim.ro |
| OMNL | Omniloko sp. z o. o. | PL | In use | |
| OMSRO | OMSAN LOGISTICA SRL | RO | In use | omsan.com/ro/ |
| OMTRN | Transtech Oy | FI | In use | transtech.fi |
| OMV | OMV PETROM SA | RO | In use | |
| OMVB | OMV Bulgaria OOD | BG | In use | omv.bg |
| ONCF | Org.Nat. Des C.deF Maroquins | MA | In use | oncf.ma |
| ONE | One (Greater Anglia Rail Franchise) | UK | Blocked | |
| ONGUM | ÖNDER GÜMRÜKLEME DENIZCILIK VE TIC. LTD. ŞTI | TR | In use | ondergumrukleme.com |
| OOS | Ostravské opravny a strojírny, s.r.o. | CZ | In use | |
| OPEN | OPEN RAIL | FR | In use | |
| OPET | Opet Petrolcülük AS | TR | In use | opet.com.tr |
| OPTIS | OPTISPED, a.s. | SK | Revoked | |
| ORAY | ORAYSAN İNŞAAT LOJİSTİK SAN. VE TİC. A.Ş. | TR | In use | oraysanl.com.tr |
| ORF | Operail Finland Oy | FI | In use | operail.com |
| ORION | F.H.U. ORION Kolej Krzysztof Warchoł | PL | In use | orionkolej.pl |
| ORKOL | ORLEN KolTrans S.A. | PL | In use | orlenkoltrans.pl |
| ORLEN | Polski Koncern Naftowy ORLEN S.A. | PL | In use | orlen.pl |
| ORME | On Rail - Gesellschaft für Eisenbahnausrüstung und Zubehör mbH | DE | In use | on-rail.com |
| ORO | ORIONE S.r.l. | IT | In use | orionetrasporti.it |
| ORWU | On Rail Gesellschaft für Vermietung und Verwaltung von Eisenbahnwaggons mbH | DE | In use | orv-moers.de |
| OSAG | Osterwalder St. Gallen AG | CH | In use | osterwalder-sg.ch |
| OSB | SWEG Südwestdeutsche Landesverkehrs-AG | DE | Revoked | sweg.de |
| OSE | Organismos Sidirodromon Ellados | EL | In use | ose.gr |
| OSEF | Ostsächsische Eisenbahnfreunde e.V | DE | In use | ostsaechsische-eisenbahnfreunde.de |
| OSEK | Austrovapor Bahnnostalgie Veranstaltungs GmbH | AT | In use | eisenbahnmuseum-heizhaus.com |
| OSLJ | Östra Södermanlands Järnväg | SE | In use | oslj.nu |
| OSSR | Ministerstvo obrany SR | SK | In use | |
| OST | LOK-OST OLOF STILLE | DE | In use | lok-ost.de |
| OSTRA | Osterwalder Transport AG | CH | In use | |
| OT | AB Östgötatrafiken | SE | In use | ostgotatrafiken.se |
| OTDTL | Oiltanking Deutschland GmbH & Co. KG | DE | In use | oiltanking.com |
| OTEX | Optima Tours BG /Oптима турс БГ | BG | In use | |
| OTMPL | OTTO MULLER PRO LOG PRZEDSIĘBIORSTWO BUDOWLANE, PROJEKTOWANIE I LOGISTYKA sp. z o.o. | PL | In use | |
| OTR | OTR Rail Sp. Z o.o. | PL | In use | otrail.pl |
| OTS | OTS Omnia Trasporti Speciali SRL | IT | In use | grp-group.com |
| OTSON | Oiltanking Finland Oy | FI | In use | oiltanking.com |
| OTTO | Technischer Handel Otto Rentschler | DE | In use | eisenbahnexperte.de |
| OTW | Oiltanking Tanklager Waltershof GmbH & Co KG | DE | In use | |
| OUIES | OUIGO ESPAÑA | ES | In use | ouigo.com/es |
| OV | Ontspanningsvereniging NS RB Haarlem | NL | In use | ontspanningsvereniging-rbh.com |
| OVAKO | Ovako Bar OY | FI | In use | ovako.com |
| OVEG | Ostbayerische Verwertungs- und Energieerzeugungsgesellschaft mbH (OVEG) | DE | In use | oveq.de |
| OWLP | Ost-West Logistic Poland sp. z o.o. | PL | In use | owlp.pl |
| OWS | OWS Service Schienenfrahrzeuge GmbH | DE | In use | ows-weiden.de |
| OX | Ox-traction NV | NL | In use | ox-traction.com |
| OZBSK | Öz Başak Tarım Akaryakıt Gıda Nakliyat San. ve Tic.Ltd.Şti. | TR | In use | ozbasaktarim.com.tr |
| OZSTA | OZ Stavby s.r.o. | CZ | In use | |
| PAA | PORR-ALPINE Austriarail GmbH | AT | Revoked | austriarail.at |
| PAGAS | Propangas AG | AT | In use | |
| PALMA | PALMA Group, a.s. | SK | In use | palma.sk |
| PAN | PanGas AG | CH | Revoked | pangas.ch |
| PAPAI | Papai Railway GmbH & Co. KG | DE | In use | papai-erdbau.de |
| PAPAS | Zarneni hrani 99 /"Зърнени храни 99" ЕАД | BG | In use | |
| PAR | Porr Austriarail GmbH | AT | In use | austriarail.at |
| PARAC | Parachini SA (Sersa Group) | CH | Revoked | sersa.ch |
| PAROL | IMPRESA PAROLDI GIUSEPPE & C. SRL | IT | In use | impresaparoldi.it |
| PARRO | PARROS OBRAS S.L.U | ES | In use | parros.es |
| PARTL | Партнер Лизинг АД | BG | In use | partner-leasing.com |
| PASS | PaSS spol s.r.o | SK | In use | |
| PAT | Zakłady Naprawcze Taboru Kolejowego “PATEREK” S.A. | PL | In use | zntk-paterek.pl |
| PAULA | Paulina Zaleska | PL | In use | |
| PAZRT | MVM Paksi Atomerőmű Zrt | HU | In use | npp.hu |
| PB | Porterbrook Leasing Co. Ltd. | UK | Blocked | porterbrook.co.uk |
| Pbas | Paliva-Bernat a.s. | CZ | In use | paliva-bernat.cz |
| PBB | BESTGES BAU GMBH | DE | In use | |
| PBC | POZ BRUK sp. z o. o. sp. j. | PL | In use | pozbruk.pl |
| PBE | Pfalzbahn Eisenbahnbetriebsgesellschaft mbH | DE | In use | pfalzbahn.de |
| PBG | PROBUGAS, a.s. Bratislava | SK | In use | |
| PBN | PORT BAZINUL NOU SA | RO | In use | |
| PBV | Verein Pro Bahn Vorarlberg | AT | In use | probahn-vlbg.at |
| PCC | PCC Cargo GmbH | DE | In use | |
| PCCC | PCC Intermodal S.A. | PL | In use | pccrail.pl |
| PCCCT | DB SCHENKER RAIL COALTRAN Sp. z o.o. | PL | Revoked | |
| PCCKL | PCC Kolchem Sp.z o.o. | PL | Revoked | |
| PCCR | PCC Rokita SA | PL | In use | |
| PCI | PKP CARGO INTERNATIONAL a.s. | CZ | In use | pkpcargointernational.com |
| PCISK | AWT RAIL SK a.s. | SK | In use | pkpcargointernational.com |
| PCK | PCK Raffinerie GmbH | DE | In use | pck.de |
| PCLA | Považská cementáreň, a. s. | SK | In use | pcla.sk |
| PCM | PETROCHEM Mineralöl-Handelsgesellschaft m.b.H. | DE | In use | |
| PCT | Handelsgesellschaft m.b.H. | DE | In use | railcargocarrier.com |
| PCVSA | PECOVASA RENFE MERCANCÍAS | ES | In use | |
| PCW | Siemens Prüfcentrum Wegberg-Wildenrath | DE | In use | |
| PDCS | PEDASTA s.r.o. | CZ | In use | lis-sro.cz |
| PDVR | PDV RAILWAY a.s. | CZ | In use | pdvr.cz |
| PEA | PETROCITERNE S.A. | FR | In use | |
| PEF | Passauer Eisenbahnfreunde e.V. | DE | In use | passauer-eisenbahn.de |
| PEG | Prignitzer Eisenbahn GmbH | DE | In use | prignitzer-eisenbahn.de |
| PEGAZ | PETROGAZ S.A. | EL | In use | petrogaz.gr |
| PELPG | Petrol LPG d.o.o. | RS | In use | petrollpg.rs |
| PENE | Nepil Petr | CZ | In use | |
| PENG | Parenz Engineering | DE | In use | |
| PENLO | PETROLOT Sp. z o.o. | PL | In use | petrolot.pl |
| PEPA | Perlen Papier AG | CH | In use | perlen.ch |
| PERN | PERN S.A. | PL | In use | pern.pl |
| PERZL | Peter Perzl GmbH | DE | In use | |
| PESA | Pojazdy Szynowe PESA Bydgoszcz S.A. | PL | In use | pesa.pl |
| PETHO | Pethoplan GmbH | DE | In use | pethoplan.de |
| PETRL | PETROL D.D., Ljubljana | SI | In use | petrol.si |
| PEVE | PEVERAIL | FR | In use | tso.fr |
| PFAFF | Josef Pfaffinger Bauunternehmug GmbH | DE | In use | pfaffinger.com |
| PFBI | Sappi Schweiz AG (Papierfabrik Biberist) | CH | In use | sappi.com |
| PFELB | Felbermayr Immo Sp. z o.o. | PL | In use | felbermayr.cc |
| PFRWS | PURIZE Filters GmbH & Co. KG | DE | In use | purize.com |
| PFT | Patrimoine Ferroviaire et Tourisme (PFT) | NL | In use | pfttsp.be |
| PGESA | PORT GDAŃSKI EKSPLOATACJA S.A. | PL | In use | pge.pl |
| PGT | Plauener Gleis- und Tiefbau GmbH | DE | In use | plauener-gleis-tiefbau.de |
| PHB | Peter Hausmann & Co. Bauunternehmung GmbH | DE | In use | hausmann-bau.de |
| PHC | PETROCART SA | RO | In use | |
| PHK | HIP-PETROHEMIJA a.d. Pančevo | RS | In use | Hip-petrohemija.com |
| PHOSC | ICL-IP Bitterfeld GmbH | DE | In use | |
| PIB | Pichenot-Bouillé | FR | In use | pichenot-bouille.fr |
| PIMK | ПИМК - Рейл EAD | BG | In use | pimk-bg.en |
| PINO | ARGE Furka 1618 c/o Pizzarotti SA | CH | In use | |
| PKESA | TAURON Wytwarzanie S.A. Oddział Elektrownia Łaziska | PL | In use | pke.pl |
| PKP | Polskie Koleje Panstwowe | PL | Blocked | pkp.com |
| PKPC | PKP CARGO Spólka Akcyjna | PL | In use | pkp-cargo.pl |
| PKPCA | FIRMA HANDLOWO-USŁUGOWA Marian Dybowski | PL | In use | |
| PKPCS | PKP CARGO SERVICE Sp. z o.o. | PL | In use | pkpcs.pl |
| PKPCT | PKP CARGOTABOR sp. z o. o. | PL | In use | cargotabor.pl |
| PKPE | PKP Energetyka S.A. | PL | In use | pkpenergetyka.pl |
| PKPIC | PKP INTERCITY S.A. | PL | In use | |
| PKPLS | PKP Linia Hutnicza Szerokotorowa spólka z o.o. | PL | In use | pkp-lhs.pl |
| PKSSA | PKS STARACHOWICE S.A. | PL | In use | |
| PLA | Franz Plasser Vermietung von Bahnbaumaschinen GmbH | AT | In use | |
| PLAG | Panlog AG | CH | In use | panlog.ch |
| PLAS | Plasmor Ltd | UK | In use | plasmor.co.uk |
| PLATA | P.H.U. Lokomotiv | PL | In use | lokomotiv.net.pl |
| PLK | PKP Polskie Linie Kolejowe Spółka Akcyjna | PL | In use | plk-sa.pl |
| PLKLK | PETROTEL-LUKOIL SA | RO | In use | lukoil.ro |
| PLKW | KOLEJE WIELKOPOLSKIE Sp. z o.o. | PL | In use | koleje-wielkopolskie.com.pl |
| PLOK | Pro-Lok GmbH | AT | In use | |
| PLPOL | PFEIFER & LANGEN POLSKA S.A. | PL | In use | diamant.pl |
| PLSLS | SILVA LS sp. z o.o. | PL | In use | kronospan.pl |
| PLUB | TRAKCJA-PL Paweł Lubicki | PL | In use | |
| PM | KGHM Polska Miedz SA | PL | Blocked | |
| PMBAC | PAMBAC SA | RO | In use | |
| PMF | PROMOBIL FLEET Sp. z o.o. | PL | In use | |
| PMHVY | Pieksämäen Höyryveturiyhdistys ry | FI | In use | pmk-hoyryveturiyhdistys.fi |
| PMR | Porvoon Museorautatie ry | FI | In use | porvoonmuseorautatie.fi |
| PMTLK | PMT Linie Kolejowe Sp. z o,o | PL | In use | |
| PMTLU | POL - MIEDŻ TRANS Sp. z o.o. | PL | In use | |
| PNI | Przedsiębiorstwo Napraw Infrastruktury Sp. z o.o. | PL | In use | pni.net.pl |
| PNUIK | Przedsiebiorstwo Napraw i Utrzymania Infrastruktury Kolejowej w Krakowie Sp. Z o.o. | PL | In use | pnuikkrakow.pl |
| PO | Porr Bau GmbH | AT | In use | porr.at |
| POIL | Prista Oil | BG | In use | prista-oil.com |
| POLCA | Zakład Przeróbki Mechanicznej Węgla „POL-CARBON” sp. z o.o. | PL | In use | polcarbon.pl |
| POLI | Polimeri AD /Полимери АД | BG | In use | polimeri.org |
| POLTR | POL-TRANS Rafał Malinowski | PL | In use | |
| PONAR | PONAR sp. z o.o. | PL | In use | ponadrzywiec.com.pl |
| PONY | PONY S.r.l. | IT | In use | |
| PORHA | Pohjois-Suomen Rautatieharrastajat ry | FI | In use | porha.com |
| PORO | Pórobeton Trutnov, a.s. | CZ | In use | |
| PORR | PORR (Polska) S.A. | PL | In use | porr.pl |
| PORSK | PORFIX - pórobetón, a.s. | SK | In use | porfix.sk |
| PORT | Interport Service s.r.o. | SK | In use | interport.sk |
| POST | Die Schweizerische Post | CH | Revoked | post.ch |
| POSTA | Česká Pošta, s.p., Odštěpný závod Střední Čechy | CZ | In use | |
| POWER | POWER Rail GmbH | DE | In use | |
| PP | Posázavský Pacifik – doprava s.r.o. | CZ | In use | posazavsky-pacifik.cz |
| PPD | PPD TRANSPORT d.o.o. za prijevoz tereta | HR | Revoked | ppd-transport.hr |
| PPE | P&P Eisenbahntechnik GmbH | AT | In use | |
| PPG | PPG Polifarb Cieszyn S.A. | PL | In use | industrial-coating.com |
| PPGWW | PPG Deco Polska Sp. Z o.o. | PL | In use | |
| PPMT | Pomorskie Przedsiebiorstwo Mechaniczno-Torowe Sp. z o.o. | PL | In use | ppmt.pl |
| PPSGD | PPS Port Północny sp. z o.o. | PL | In use | port-polnocny.pl |
| PPSSK | Prvá prepravná spoločnosť, s.r.o. | SK | In use | pus.sk |
| PR | Pakistan Railways | PK | In use | pakrail.com |
| PRA | Holcim (Česko) a.s., člen koncernu | CZ | In use | |
| PRAB | Peterson Rail AB | SE | In use | peterson.no |
| PRAIL | Port Rail OOD | BG | In use | |
| PRB | Peusse Baubetriebe GmbH | DE | In use | preussebau-hh.de |
| PRBT | PREBET AIUD SA | RO | In use | prebet.ro |
| PRCON | PROIECT CONSULT SRL | RO | In use | |
| PRECH | PRECHEZA a.s. | CZ | In use | |
| PRED | PREDEMET SA | RO | In use | |
| PREFA | PREFAB S.A. | RO | In use | prefab.ro |
| PREG | POLREGIO S.A. | PL | In use | polregio.pl |
| PRESS | Eisenbahn-Bau- und Betriebsgesellschaft Pressnitztalbahn mbH | DE | In use | pressnitztalbahn.com |
| PREU | PBG - Preussenbahn GmbH | DE | Revoked | |
| PRG | Pružne građevine d.o.o. | HR | In use | prg.hr |
| PRICB | ProRail | NL | In use | prorail.nl |
| PRKKR | Przedsiębiorstwo Robót Komunikacyjnych w Krakowie S.A. | PL | Revoked | prk.krakow.pl |
| PRKWR | Przedsiębiorstwo Robót Kolejowych i Inżynieryjnych S.A. | PL | Revoked | grupatrakcja.com |
| PRMG | Primagra, a.s. | CZ | In use | primagra.cz |
| PRMR | PROMOBIL RENT sp. z o.o. | PL | In use | |
| PROAG | P.H.U. „PRO-AGRA” sp. z o. o. | PL | In use | |
| PROD | PRODACH CZ, s.r.o. | CZ | In use | |
| PROM | PROMET Sp. z o.o. | PL | In use | |
| PROSE | PROSE AG | CH | In use | prose.ch |
| PROT | Protor sp. z o.o. sp. k. | PL | In use | protorsa.com.pl |
| PRS | Pegasus Rail Service | DE | In use | pegasus-rail.de |
| PRSG | Plasser Robel Services GmbH | DE | In use | pr-services.com |
| PRT | Przedsiębiorstwo Robót Torowych “TORREMS” sp. z o. o. | PL | In use | torrems.pl |
| PRW | Progress Railways s.r.o. | SK | In use | progressrailways.sk |
| PRZLA | UAT ORAS ZLATNA | RO | In use | primaria-zlatna.ro |
| PSHZD | Pardubický spolek historie železniční dopravy | CZ | In use | |
| PSI | Peters-Stahlbau-Gesellschaft mbH | DE | In use | peters-ambh.de |
| PSP | PETROLSPED Slovakia s.r.o. | SK | In use | |
| PSPCG | PSP CARGO GROUP SA | RO | In use | |
| PSSKR | Podkarpackie Stowarzyszenie Sympatyków Kolei | PL | In use | pssk.rzeszow.pl |
| PSTT | PKP CARGO CONNECT sp. z o.o. | PL | In use | tradetrans.pl |
| PSZ | Prvá Slovenska železničná, a.s. | SK | In use | psz.sk |
| PT | PROGRESS TRADING, a.s. | SK | In use | progresstrading.com |
| PTK | DB Schenker Rail Zabrze S.A. | PL | Revoked | ptkholding.pl |
| PTMKZ | Pomorskie Towarzystwo Miłośników Kolei Żelaznych | PL | In use | ptmkz.pl |
| PTS | POLSKI TABOR SZYNOWY SPÓŁKA Z O.O. | PL | In use | polskitabor.pl |
| PTU | Porr Technobau & Umwelt AG | AT | Revoked | porr.at |
| PUHOS | Puhoksen Veturipalvelu OY | FI | In use | tt-konepalvelu.fi/veturipalvelu.htm |
| PULT | PULTRANS Kft. | HU | In use | pultrans.hu |
| PUNDO | concert-logistics unirail GmbH | DE | In use | otte-mettingen.com |
| PUS | Puš s.r.o. | CZ | In use | pussro.cz |
| PVC | Pacific Vapeur Club | FR | In use | pacificvapeurclub.free.fr |
| PVTKZ | PODBLANICKÝ VĚDECKOTECHNICKÝ KLUB ŽELEZNIČNÍ z. s. | CZ | In use | lk-audit.com |
| PW | Parowozownia Wolsztyn | PL | In use | parowozowniawolsztyn.pl |
| PWPVR | Public Works s.l. | ES | In use | public-works.es |
| PxT | Proxion Train Oy | FI | Revoked | |
| PZS | Podvihorlatský železničny spolok | SK | In use | facebook.com/pzshe/?fref=ts |
| QBZ | Qbuzz B.V. | NL | In use | qbuzz.nl |
| QQLKA | OLKOL SPÓŁKA Z O.O. | PL | In use | olkol.pl |
| QUADR | QUADRUM BVBA | BE | In use | |
| QUAGA | QUADRIO GAETANO COSTRUZIONI SPA | IT | In use | quadrio.it |
| QUASE | Quadrante servizi srl | IT | In use | quadranteservizi.it |
| QVTEE | Stichting Nederlands Transport Museum | NL | In use | nederlandstransportmuseum.nl |
| RA | REGIONALPS SA | CH | In use | regionalps.ch |
| RABR | Rabbit Rail s.r.o. | CZ | In use | rabrail.cz |
| RADVE | RailAdventure GmbH | DE | In use | railadventure.de |
| RAE | Raeder & Falge s.r.o. | CZ | In use | raeder-falge.cz |
| RAFG | RAFG FEROVIAR SRL | RO | In use | |
| RAFO | RAFO S.A. | RO | In use | rafo.ro |
| RAFSR | RAFINARIA STEUA ROMANA SA | RO | In use | astra-passengers.ro |
| RAG | RDC Asset GmbH | DE | In use | rdc-deutschland.de |
| RAI | Rahahan-e Djomhouri-e Eslami Iran - Iran Railways | IR | In use | irirw.com |
| RAID | railaid rosendahl GmbH | DE | In use | |
| RAIF | Raiffeisen Lagerhaus Hopfgarten - Wörgl und Umgebung reg. Gen. mbH | AT | In use | |
| RAIL | RAIL E INFRAESTRUCTURAS, S.A. | ES | In use | |
| RAILC | Rail-Cars sp. z o. o. | PL | In use | |
| RAILE | Railengineering Gönnez ZT | AT | In use | railengineering.at |
| RAILL | Rolling Stock Lease s. r. o. | SK | In use | sslovensko.sk |
| RAILM | Railmotion AG | CH | In use | railmotion.com |
| RAILO | RAILOC Srl. | IT | In use | railoc.it |
| RAILP | Rail Polska Sp. Z o.o | PL | In use | railpolska.pl |
| RAILS | Rail & Service | DE | In use | |
| RAILT | Railtek Oy Insa | FI | In use | railtek.fi |
| RAILU | Rail 4U-Eisenbahndienstleistungen | DE | In use | rail4u.eu |
| RAILV | VRAIL SRL | IT | In use | vrail.it |
| RAILW | Leo Express GmbH & Co. KG. | AT | In use | |
| RAILX | RailExperience GmbH | AT | In use | railexperience.eu |
| RAL | Rent-a-Lok GbR | DE | In use | rentalok.de |
| RALP | Ralpin AG | CH | In use | ralpin.com |
| RALSP | Rail Support, s.r.o. | SK | In use | |
| RALWR | Rail Workshop, s. r. o. | SK | In use | |
| RAN | Railservice Alexander Neubauer | DE | In use | r-an.net |
| RANOF | Novák Radek | CZ | In use | |
| RAPEC | Radomskie Przedsiębiorstwo Energetyki Cieplnej RADPEC S.A. | PL | In use | radpec.com.pl |
| RAR | Rent-A-Rail Eisenbahn Service | DE | In use | rent-a-rail.de |
| RASOL | Railway Solutions Harad Giessler | DE | In use | |
| RASY | Rail System S.r.l. | IT | In use | |
| RAT | Rent A Train GmbH | DE | In use | |
| RATH | rail thuringia GmbH | DE | In use | rail-thuringia.de |
| RATP | Régie Autonome des Transports Parisiens | FR | In use | ratp.fr |
| RAVEN | Raven Trading s.r.o. | CZ | In use | |
| RAVN | RAVN Bane ApS | DK | In use | ravn-bane.dk |
| RAVSK | Raven a.s. | SK | In use | |
| RAXEL | Grupo Raxell Filiux, S.L. | ES | In use | |
| RAXRA | RAXELL RAIL S.A. | ES | In use | raxellrail.com |
| RAYSR | RAYSER LOJISTIK DEPOLAMA TICARET VE SANAYI ANONIM ŞIRKETI | TR | In use | rayser.com.tr |
| RB | Rigi-Bahnen AG | CH | In use | rigi.ch |
| RBAHN | regiobahn RB GmbH | AT | In use | regiobahn.at |
| RBAU | Reisse-Bau GmbH | DE | In use | |
| RBB | Regiobahn Bitterfeld Berlin GmbH | DE | In use | captrain.de/unternehmen/standorte/regiobahn-bitterfeld-berlin |
| RBE | Rheinisch-Bergische Eisenbahn-Gesellschaft mbH | DE | In use | rbe-connex.de |
| RBG | Regental Bahnbetriebs GmbH | DE | In use | laenderbahn.com |
| RBH | RBH Logistics GmbH | DE | In use | rbh-logistics.de |
| RBK | Regionalbahn Kassel GmbH | DE | In use | kne-online.de |
| RBL | Rail Bavaria Logistik GmbH | DE | In use | railbavaria.de |
| RBS | Regionalverkehr Bern-Solothurn | CH | In use | rbs.ch |
| RBSA | RBS Reuschling Bahn und Service GmbH | DE | In use | reuschling.de |
| RBSAF | RBS Asset Finance Europe Limited | UK | In use | |
| RBT | RbT Regiobahn Thüringen GmbH | DE | In use | rbt-regiobahn.de |
| RBTCA | Rentsch & Balke Tiefbau GmbH | DE | In use | rbt-tiefbau.de |
| RBUD | Przedsiębiorstwo Usługowo Handlowe “RAJBUD” Sp. Z o.o. | PL | In use | rajbud.eu |
| RBZ | Rail Innovators Consult BV hodn RailbrokerZ | NL | In use | railbrokerz.com |
| RC | Rail Contact GmbH | DE | In use | euroturk-express.com |
| RCAB | Railcare AB | SE | In use | railcare.se |
| RCAS | Railway Capital, a.s. | CZ | In use | railwaycapital.cz |
| RCB | Rail Cargo Berlin | DE | In use | railcargo-berlin.de |
| RCBV | REGIO CALATORI SRL | RO | In use | |
| RCCCZ | Rail Cargo Carrier - Czech Republic, s.r.o. | CZ | In use | railcargocarrier.com/cz/ |
| RCCDE | Rail Cargo Carrier - Germany GmbH | DE | In use | railcargocarrier.de |
| RCCF | RC-CF TRANS SRL | RO | In use | rccf.ro |
| RCCHU | Rail Cargo Carrier Kft. | HU | In use | railcargocarrier.com |
| RCCIT | Rail Cargo Carrier – Italy s.r.l | IT | In use | railcargo.it |
| RCCRO | RAIL CARGO CARRIER ROMANIA SRL | RO | In use | railcargocarrier.com/ro |
| RCCZ | Rail Clinic, s.r.o. | CZ | In use | railclinic.eu |
| RCDK | Railcare Danmark A/S | DK | In use | railcare.se |
| RCE | Railcare Export AB | SE | In use | railcare.se |
| RCG | Regental Cargo GmbH | DE | In use | laenderbahn.com |
| RCH | Rail Cargo Hungaria ZRt. | HU | In use | railcargo.hu |
| RCHEM | rail4chem Eisenbahnverkehrsgesellschaft | DE | In use | rail4chem.de |
| RCI | Rail Cargo Italia s.r.l. | IT | Revoked | railcargo.it |
| RCL | Railcare Logistik Ab | SE | Revoked | railcare.se |
| RCLTD | Railcare Sweden Ltd | UK | In use | railcare.co.uk |
| RCM | RCM Rail Care and Management GmbH | DE | In use | rcm-rail.de |
| RCN | Vossloh Rail Center GmbH | DE | Revoked | |
| RCO | Railco a.s. | CZ | In use | railco.eu |
| RCONS | Р Консулт 2000 ЕООД | BG | In use | |
| RCOS | Railco Services, s.r.o. | CZ | Revoked | railco.eu |
| RCP | Rail Capital Partners sp. z o.o. | PL | In use | |
| RCRO | RAIL CARGO ROMANIA SRL | RO | In use | railcargo.at |
| RCT | Railcare T AB | SE | In use | railcare.se |
| RCW | Rail Cargo Austria AG | AT | In use | railcargo.at |
| RD | ComTraUG | DE | In use | comtrau-ug.eu |
| RDB | Rail Design Bäcker | DE | In use | |
| RDC | RDC Deutschland GmbH | DE | In use | rdc-deutschland.de |
| RDK | Railion Denmark | DK | Revoked | railion.dk |
| RDRR | Republička direkcija za robne rezerve | RS | In use | rdrr.gov.rs |
| RDT | REGIE DEPARTEMENTALE DES TRANSPORTS DES BOUCHES DU RHONE(RDT13 ) | FR | In use | rdt13.fr |
| RDX | Raildox GmbH & Co, KG | DE | In use | raildox.de |
| RE | Rheinische Eisenbahn GmbH | DE | In use | -- |
| REAL | Real Rail Sweden AB | SE | In use | sandahlsbolagen.se/real-rail/ |
| REB | Rekers Betonwerk GmbH & Co. KG | DE | In use | |
| RECF | RECURSOS FERROVIARIONS S.L. | ES | Revoked | recfer.com |
| RECUP | RECUPERI S.r.l. | IT | In use | recuperisrl.it |
| REDA | Lafarge Aggregates Limited | UK | In use | lafarge.co.uk |
| REDAL | Redalsa S.A. | ES | In use | |
| REF | Rendsburger Eisenbahn-Freunde e.V. | DE | In use | rendsburger-eisenbahnfreunde.de |
| REFER | Rede Ferroviária Nacional, E.P. | PT | In use | refer.pt |
| REG | Regiobahn GmbH | DE | In use | regio-bahn.de |
| REGCJ | REGIONAL SRL | RO | In use | |
| REGIO | Regiobahn Fahrbetriebsgesellschaft mbH | DE | In use | regio-bahn.de |
| REICH | Reichert Servicecenter | DE | In use | reichertservicecenter.de |
| REIF | REIF Bauunternehmung GmbH & Co. KG | DE | In use | reif-bau.de |
| REKOM | RENT KOMTRANS spółka z ograniczoną odpowiedzialnością sp. k. | PL | In use | rent-komtrans.pl |
| REL | 2 Rail | DE | In use | |
| RELOC | RELOC S.A. | RO | In use | relocsa.ro |
| REMAT | REMAT S.A. | RO | In use | |
| REMBC | REMAT SA | RO | In use | |
| REMBV | REMAT SA | RO | In use | rematbv.ro |
| REMMG | REMAT MG SA | RO | In use | |
| REMRA | REMBUD RAIL sp. z o.o. | PL | In use | rembudrail.pl |
| REMSC | REMKOL S.C. Cezary Kultys, Grzegorz Komisarczyk | PL | In use | |
| RENFA | Renfe Alquiler de Materia Ferroviario, S.A. | ES | In use | renfe.com/alquiler/ |
| RENFF | Renfe Fabricación y Mantenimiento S.A. | ES | In use | renfe.com/empresa/integria.index.html |
| RENFM | RENFE MERCANCIAS S.A. | ES | In use | |
| RENFV | Renfe Viajeros, S.A. | ES | In use | renfe.com/viajeros/ |
| RENTR | RENTRANS CARGO SP. Z O.O. | PL | In use | |
| RESRL | RE ALDO SRL | IT | In use | realdosrl.it |
| RET | Railtec Eisenbahnrtechnik | DE | In use | railtec-eisenbahntechnik.de |
| REVA | REVA S.A. | RO | In use | revasimeria.ro |
| REVAG | REVAG SRL | RO | In use | |
| REXSK | REXIAS, a.s. | SK | In use | |
| REXW | REXWAL SERVICES SA | FR | In use | |
| REXWL | REXWAL SERVICES SA | CH | Revoked | |
| RF | Railflex GmbH | DE | In use | railflex.de |
| RFB | ROMPLUMB SA | RO | In use | romplumb.ro |
| RFCT | Rail4Chem Transalpin AG | CH | Revoked | |
| RFH | Rostocker Fracht- und Fischereihafen GmbH | DE | In use | |
| RFI | Rete Ferroviaria Italiana | IT | In use | rfi.it |
| RFO | RAIL FORCE | RO | In use | |
| RFOFS | Rail Force One Fleet Services | NL | In use | railforce.one |
| RFS | Railpromo Fleet Services B.V. | NL | In use | railpromo.nl |
| RFTR | REPFERTRANS S.R.L | RO | In use | |
| RFX | RailFX B.V. | NL | In use | railfx.nl |
| RG | Rana Gruber | NO | In use | ranagruber.no |
| RGT | REGIOTRANS SRL | RO | In use | regiotrans.ro |
| RHB | Rhätische Bahn (RhB) | CH | In use | rhb.ch |
| RHBG | Rheingold-Zug Betriebsgesellschaft mbH | DE | In use | rheingold-zug.com |
| RHC | RheinCargo GmbH & Co. KG | DE | In use | rheincargo.com |
| RHCL | Rhenus Contract Logistics AG | CH | In use | rhenus.com |
| RHE | RAIL HUB EUROPE SPA | IT | In use | rhespa.it |
| RHEB | Rheinhessische Eisenbahn | DE | In use | rheb.de |
| RHG | Raphael Hofmann Güterverkehr | DE | In use | |
| RHK | Ratahallintokeskus | FI | Revoked | rhk.fi |
| RHKE | Hafen Krefeld GmbH & Co. KG | DE | In use | rheinhafen-krefeld.de |
| RHO | REMATHOLDING CO SRL | RO | In use | rematholding.ro |
| RhoBT | Rhomberg Bahntechnik GmbH | AT | In use | bahntechnik.com |
| RHOFL | Rhomberg Fahrleitungsbau GmbH | AT | In use | rhombergfahrleitung.at |
| RHOGB | Rhomberg Gleisbau GmbH | AT | In use | bbw.at |
| RHPL | Rhenus Port Logistics AG | CH | In use | rhenus.ch |
| RHY | Rhytank AG | CH | Revoked | rhytank.ch |
| RICI | Rail in-Club GmbH | CH | Revoked | railin.ch |
| RIF | RIFEST R-S, sdružení podnikatelů | CZ | Revoked | |
| RIG | Railinnovators Group AssetCo | NL | In use | railinnovators.group |
| RILEY | Riley and Son (Electromec) Ltd. | UK | In use | |
| RIM | Rheinisches Industriebahn Museum e.V | DE | In use | aartalbahn.de |
| RIMEF | R.I.M.E.F. SRL | IT | In use | rimef.com |
| RINCJ | REMATINVEST SRL | RO | In use | rematinvest.ro |
| RIS | Regio Infra Service Sachsen GmbH | DE | In use | infra-service-sachsen.de |
| RIT | Riffelalp Tram - Riffelalp Resort AG | CH | In use | riffelalp.com |
| RITAL | Rail Italia S.r.l. | IT | In use | interportosudeuropa.it |
| RIWNL | Sim Boerema B.V. | NL | In use | riw.nl |
| RJ | RegioJet, a.s. | CZ | In use | regiojet.cz |
| RJAN | Mag.Rudolf Janisch | AT | In use | |
| RJB | Stifelsen Rjukanbanen | NO | In use | |
| RJP | RegioJet Pool, a.s. | CZ | In use | regiojet.cz |
| RJSK | RegioJet a.s. | SK | In use | |
| RK | Rhenus Keolis GmbH | DE | In use | rhenus-keolis.de |
| RL | Rail-Loco Paweł Plata | PL | In use | |
| RLAG | RaiLogistics AG | CH | Revoked | railogistics.com |
| RLC | railCare AG | CH | In use | railcare.ch |
| RLCTG | Rail Consulting s.r.o. | SK | In use | railconsulting.eu |
| RLFR | Rosiński Logistics | PL | In use | rl.kruszywa.pl |
| RLG | Regionalverkehr Ruhr-Lippe GmbH | DE | In use | wle-online.de |
| RLGC | Railogic | DE | In use | railogic.de |
| RLJ | Museiföreningen Risten – Lakviks Järnväg | SE | In use | rlj.se |
| RLK | RETROLOK s.r.o. | CZ | In use | retrolok.com |
| RLL | RailLog s.r.o. | SK | In use | raillog.sk |
| RLLS | Raillease, a.s. | CZ | In use | raillease.eu |
| RLMF | REG-LOK Mirosław Fiuk | PL | In use | |
| RM | Rallarmålarna AB | SE | In use | rallarmalarna.se |
| RMAR | RAILMAR AGENCY LTD, s.r.o. | CZ | In use | |
| RMBNL | Handel en Adviesburo Nerbenta BV | NL | In use | rmbarneveld.nl |
| RMD | RailMaint GmbH | DE | In use | railmaint.com |
| RME | Röbel/Müritz Eisenbahn GmbH | DE | In use | roebel-mueritz-eisenbahn.de |
| RML | RM LINES, a.s. | CZ | In use | rmlines.cz |
| RMS | Rautatiemuseon Säätiö | FI | In use | rautatiemuseo.fi |
| RMT | RAILMAT | FR | In use | |
| RMTI | P.H.U. RAMATECH –INSTAL S.C. Kazimierz Malec Krzysztof Racułt | PL | In use | ramatech.pl |
| RMW | Railservice Mittelweser GmbH | DE | In use | rmw.gmbh |
| RN | Railion Nederland | NL | In use | railion.nl |
| RND | RND s.r.o. | CZ | In use | rndoc.cz |
| RNE | RNE Rhein-Neckar-Eisenbahservicegesellschaft mbH | DE | In use | |
| ROB | Robel | DE | In use | |
| ROCEA | Rock Rail East Anglia PLC | UK | In use | rockinfrastructure.com |
| ROCMG | Rock Rail Moorgate PLC | UK | In use | rockinfrastructure.com |
| ROCSW | Rock Rail South West PLC | UK | In use | rockinfrastructure.com |
| RODE | Rode Gleis und Tiefbau GmbH | DE | In use | |
| ROEE | ROMANIA EUROEST SA | RO | In use | |
| ROEEE | Raab-Oedenburg-Ebenfurter Eisenbahn AG | AT | In use | raaberbahn.at |
| ROEHL | Röhll Munitionsbergung GmbH | DE | In use | roehll.de |
| ROFSR | FSR RAILSERVICE SRL | RO | In use | |
| ROG | ROGESA Roheisengesellschaft Saar mbH | DE | In use | rogesa.de |
| ROHDE | Rohde Bahnbau GmbH & Co. KG | DE | In use | rohde-bau.de |
| ROHW | Friedrich Rohwedder GmbH | DE | In use | rohwedder.net |
| ROHWS | Friedrich Rohwedder Baumaschinen GmbH & Co. Service KG | DE | In use | rohwedder.net |
| ROKEM | KEMWATER CRISTAL SRL | RO | In use | |
| ROLMA | Rolmafer | CH | Revoked | rolmafer.ch |
| ROMAG | RAAN - SUCURSALA ROMAG TERMO | RO | In use | |
| ROMDS | M&D SEA FARERS SRL | RO | In use | seabunker.ro |
| ROMPK | ROMPAK S.R.L. | RO | In use | rompak.ro |
| RONE | CFI Logistics Services S.p.A. | IT | In use | compagniaferroviariaitaliana.it/index.php |
| ROP | RAIL OPERATIONS SRL | RO | In use | |
| ROPAG | ROP Roth AG | DE | In use | |
| ROPAN | EUROPAN PROD SA | RO | In use | europanprod.3x.ro |
| ROTER | TERMICA SA | RO | In use | |
| ROTTD | TTD TIMBER SRL | RO | In use | |
| ROTUC | ROTUCOLOR 2003 | ES | In use | |
| ROVTR | VEST TRANS RAIL SRL | RO | In use | |
| ROY | STE ROY | FR | In use | |
| RP | Railpro | NL | In use | voestalpine.com/railpro/nl |
| RPE | RP Eisenbahn | DE | In use | rp-eisenbahn.de |
| RPL | Rompetrol Logistics SA | CZ | In use | |
| RPM | rail Promotion | DE | In use | railpromotion.de |
| RPOL | Railpolonia sp. z o.o. | PL | In use | railpolonia.pl |
| RPOOL | Railpool GmbH | DE | In use | railpool.eu |
| RPR | RailParty Rheinland GmbH | DE | In use | railparty.de |
| RPRS | Railsystems RP GmbH | DE | In use | railpool.info |
| RPS | Rail Professionals Stütz GmbH | AT | In use | railprofi.com |
| RPSI | Railway Preservation Society of Ireland | IE | In use | steamtrainsireland.com |
| RPSYS | Rail Power Systems GmbH | DE | In use | rail-ps.com |
| RPVSB | REMONT I PROIZVODNJA ŽELJEZNIČKIH VOZILA d.o.o. | HR | In use | rpvsb.hr |
| RR | Rautaruukki Oy | FI | In use | ruukki.com |
| RRB | RRB Slovakia, s.r.o. | SK | In use | rrb.sk |
| RRCAB | RailRoad Construction Sweden AB | SE | In use | |
| RRCSM | RRC Spår Maskiner AB | SE | In use | |
| RRF | Rotterdam Rail Feeding | NL | In use | railfeeding.nl |
| RRFR | Regiorail France | FR | In use | |
| RRI | Rhenus rail St.Ingbert GmbH | DE | In use | rhenus.com |
| RRL | RailReLease b.v. | NL | In use | railrelease.com |
| RRLR | Regiorail France | FR | Revoked | |
| RRS | Rail Rent Service sp. z o. o. | PL | In use | rrservice.pl |
| RRSK | Regio Rail, s.r.o. | SK | In use | regiorail.sk |
| RS | RS Railspeed SA | CH | In use | |
| RSA | Boliden Mineral AB | SE | In use | boliden.com |
| RSAT | Rail&Sea Logistics GmbH | AT | In use | railsea.at |
| RSBG | Rennsteigbahn GmbH & Co. KG | DE | In use | rennsteigbahn.de |
| RSC | DB Schenker Rail Scandinavia A/S | DK | Revoked | railion.dk |
| RSCO | ROLLING STOCK COMPANY S.A. | RO | In use | rsco.ro |
| RSD | RSD-Sicherheitsdienst GmbH& Co. | DE | In use | |
| RSDER | RAILSIDER LOGISTICA FERROVIARIA, S.A. | ES | In use | railsider.es |
| RSE | RSE Rhein-Sieg-Eisenbahn GmbH | DE | In use | rse-bonn.de |
| RSEJ | Railservice | DK | In use | railservice.dk |
| RSG | Rhomberg Sersa Deutschland GmbH | DE | In use | germany.rhomberg-sersa.com/de |
| RSL | Rad und Schiene Logistik GmbH | DE | In use | radundschiene.de |
| RSS | Railservis s.r.o. | CZ | In use | |
| RSSSK | Rail Services Slovakia, s.r.o. | SK | In use | |
| RST | Rangier Service und Transport GmbH | DE | In use | rangierservice.de |
| RSTL | RST Logistics sp. z o. o. | PL | In use | rstlogistics.pl |
| RSTM | Rail ST sp. z o.o. | PL | In use | |
| RSTV | Rinteln-Stadthagener Verkehrs GmbH | DE | In use | |
| RSU | RailSupport | DE | In use | |
| RSV | Rhomberg Sersa Vossloh GmbH | DE | In use | rsv.gmbh |
| RSZS | RETRO-SLEZSKÁ ŽELEZNIČNÍ SPOLEČNOST s.r.o. | CZ | In use | slezskyzeleznicnispolek.cz |
| RT | Rittgård Trading AB | SE | In use | |
| RTB | Rurtalbahn GmbH | DE | In use | rurtalbahn.de |
| RTBBG | Railway Tehnik Blgaria | BG | In use | |
| RTBC | RTB Cargo GmbH | DE | In use | rtb-cargo.com |
| RTC | Rail Traction Company | IT | In use | railtraction.it |
| RTFI | RAILL TRANSPORT FEROVIAR INTERNATIONAL SRL | RO | In use | |
| RTI | Railtrans International, s.r.o | SK | In use | |
| RTIW | Railtrans Wagon, s.r.o. | SK | In use | railtrans.eu |
| RTK | RTK Reis-Tiefbau-Kabelbau | DE | In use | |
| RTKFT | Rail Technika Mérnöki Szolgáltató és Kereskedelmi Kft. | HU | In use | railtechnika.hu |
| RTL | Riviera Trains Ltd. | UK | In use | riviera-trains.co.uk |
| RTLOG | Rail Time Logistics GmbH | DE | In use | railtime-logistics.com |
| RTLSK | RT Logistic, a. s. | SK | In use | rtlogistic.sk |
| RTOG | Regionstog A/S | DK | In use | regionstog.dk |
| RTP | Rail Time Polska sp. z o.o. | PL | In use | railtime-polska.eu |
| RTPL | RAILTRANS POLAND sp. z o.o. sp. k. | PL | In use | |
| RTS | RTS Rail Transport Service GmbH | AT | In use | rts-rail.com |
| RTT | RAILTRANSPORT s.r.o. | CZ | Revoked | railtrans.info |
| RTTS | RailTransport-Stift s.r.o. | CZ | In use | rtt-s.eu |
| RTU | Rail2U B.V. | NL | In use | |
| RTUL | Rail Rechnology & Logistics GmbH | DE | In use | rtul.de |
| RTX | Railtraxx BVBA | BE | In use | railtraxx.be |
| RUG | Rund ums Gleis GmbH | DE | In use | rundumsgleis.com |
| RUHRO | Ruhr Oel GmbH | DE | In use | bpge.de |
| RUHTB | RuhrtalBahn GmbH - Tigges, Stefan | DE | In use | ruhrtalbahn.de |
| RUKB | Rügensche Kleinbahn GmbH | DE | In use | rasender-roland.de |
| RULBD | RULMENTI SA | RO | In use | urb.ro |
| RUSH | Rush Rail AB | SE | In use | rushrail.se |
| RUTR | RUTR, spol. S.r.o. | CZ | In use | rutr.cz |
| RUWA | RUWA Drahtschweisswerk AG | CH | In use | ruwa-ag.ch |
| RVG | Railvetica GmbH | CH | In use | railvetica.ch |
| RVM | Regionalverkehr Münsterland GmbH | DE | In use | wle-online.de |
| RVP | Remontno-Vuzstanovitelno Predprijatie - Koehne | BG | In use | rvp-koehne.com |
| RVS | RVS, spol. s r.o. | SK | In use | |
| RVSD | Regionalverkehre Start Deutschland GmbH | DE | In use | startgmbh.com |
| RVTH | RVT-Historique | CH | In use | rvt-historique.ch |
| RWAY | Railway24 GmbH | DE | In use | railway24.de |
| RWS | RWS Services s. r. o. | SK | In use | |
| RWTN | Raj-Wagon spol. s.r.o. | SK | In use | |
| RWZ | Raiffeisen Waren-Zentrale Rhein-Main eG | DE | In use | rwz.de |
| RX | Rail-X AB | SE | In use | rail-x.se |
| RXP | Railexperts B.V. | NL | In use | railexperts.nl |
| RXPE | RXP ECM B.V. | NL | In use | |
| RYDC | RYKO a.s. | CZ | In use | ryko.eu |
| RYK | Raykent Lojistik Demiryolu Hizmetleri Depolama Taahhüt Sanayi ve Ticaret Anonim Şirketi | TR | In use | raykent@raykentlojistik.com.tr |
| RYKO | RYKO PLUS spol. s r.o. | CZ | In use | |
| RZBAU | R&Z Bau GmbH | AT | In use | rz-bau.at |
| RZD | Russkiye Zheleznye Dorogi | RU | In use | rzd.ru |
| RZFFF | Zweckverband Fränkisches Freilandmuseum Fladungen | DE | In use | freilandmuseum-fladungen.de |
| SAB | Schwäbische Alb -Bahn e.V | DE | In use | bahnhof-muensingen.de |
| SAD | SAD S.p.A. | IT | In use | sad.it |
| SAFER | SA.FER CONSTRUZIONI SRL | IT | In use | |
| SAG | SAG GmbH, GB Services | DE | Revoked | |
| SAGA | Saga Rail AB | SE | In use | sagarail.se |
| SAGRW | Salamon Railway GmbH & Co. KG | DE | In use | salamon-ag.de |
| SAJET | SAJET SA | CH | In use | sajet.ch |
| SALIN | Schweizer Salinen AG | CH | In use | salz.ch |
| SALTA | ATLAS Thüringen Baumaschinen- und Fahrzeugtechnik GmbH | DE | In use | atlas-thueringen.de |
| SAMCL | SaM silnice a mosty a.s. | CZ | In use | |
| SANEX | SANEX S.A. | RO | In use | |
| SANI | SANIRAIL Gleis- und Tiefbau GmbH | DE | In use | sanirail-nuernberg.de |
| SANO | SANO-PROPAN GmbH | DE | In use | sano.de |
| SANRE | SANRE, spol. s r.o. | CZ | In use | |
| SAR | “SARKOM” – Środki Transportu Kolejowego sp. z o.o. | PL | In use | sarkom.wroc.pl |
| SAS | Stockholms Ånglokssällskap | SE | In use | anglok.se |
| SASTR | SAS TASIMACILIK VE TICCARET LTD.STI | TR | In use | sastrans.com |
| SATV | TUDELA VEGUIN, S.A. | ES | In use | grupomasaveu.es |
| SB | Stuttgarter Bahn Ltd. | DE | In use | stuttgarter-bahn.de |
| SBAU | Schweerbau GmbH & Co.KG | DE | In use | schweerbau.de |
| SBB | Schweizerische Bundesbahnen SBB | CH | In use | sbb.ch |
| SBBC | Schweizerische Bundesbahnen SBB Cargo AG | CH | In use | sbbcargo.com |
| SBBCI | SBB Cargo Italia S.r.L. | IT | In use | |
| SBBD | SBB GmbH | DE | In use | sbb-deutschiand.de |
| SBBH | SBB Historic | CH | In use | sbbhistoric.ch |
| SBBI | Schweizerisches Bundesbahnen, Infrastruktur | CH | In use | sbb.ch |
| SBBIN | SBB Cargo International AG | CH | In use | sbbcargo-international.com/ |
| SBD | Sächsische Bau GmbH | DE | In use | wiebe.de |
| SBE | Sächsich-Böhmische-Eisenbahn GmbH | DE | In use | mandaubahn.de |
| SBF | A/S Storebælt | DK | In use | storebaelt.dk |
| SBFS | Soletanche Bachy Fondations Spéciales | FR | In use | sbfs.fr |
| SBG | Axor Mietservice GmbH | DE | In use | axor-rentals.de |
| SBM | “SBM” sp. z o. o. sp. k. | PL | In use | sbm-rail.com |
| SBO | Sächsische Binnenhäfen Oberelbe GmbH | DE | In use | binnenhafen-sachsen.de |
| SBS | Stadtbahn Saar | DE | In use | |
| SBSC | SBS Cargo Praha s.r.o. | CZ | In use | sbscargo.cz |
| SBSW | sbs wagon s.r.o. | CZ | In use | |
| SBTDT | Subterra a.s. | CZ | In use | subterra.cz |
| SBW | Museiföreningen Stambanans Wänner | SE | In use | mfsbw.se |
| SC | South Central (New Southern Railway) | UK | Blocked | southcentral.co.uk |
| SCBUE | Weinimport Scherer & Bühler AG | CH | In use | scherer-buehler.ch |
| SCCON | Scandicon AB | SE | In use | |
| SCF | SCF Eisenbahnbetriebsgesellschaft UG | DE | In use | |
| SCH | Sägewerk Schwaiger GmbH & Co. KG | DE | In use | saegewerk-schwaiger.de |
| SCHEU | Scheuchzer SA | CH | In use | scheuchzer.ch |
| SCHFL | Schienenflotte GmbH | DE | In use | schienenflotte.de |
| SCHL | Schleith GmbH Baugesellschaft | DE | In use | schleith.de |
| SCHO | Schollenberger Kampfmittelbergung GmbH | DE | In use | schollenberger.de |
| SCHW | Schwalbe Baugesellschaft mbH & Co. KG | DE | In use | schwalbebau.de |
| SCKL | Schröder & Klaus GmbH + Co. KG | DE | In use | |
| SCP | Mondi SCP, a.s. | SK | In use | |
| SCRAT | SCR ServiceCargoRail GmbH | AT | In use | scr-gmbh.at |
| SCTP | Scandinavian Trainpartner AB | SE | In use | |
| SD | Servicerail Deutschland GmbH | DE | In use | |
| SDEHC | Siemens Mobility GmbH | DE | In use | siemens.com |
| SDEHN | Sascha Dehn | DE | In use | lokservice-dehn.de |
| SDKD | SD - Kolejová doprava, a.s. | CZ | In use | |
| SDN | Schwaben Dampf e.V. | DE | In use | schwabendampf.de |
| SDS | SLEZSKÁ DOPRAVNÍ A STROJNÍ s.r.o. | CZ | In use | |
| SDT | Site du Train | FR | In use | sitedutrainnimes.fr |
| SDTAL | Sedad Altıntop Nakliyat Madencilik İnşaat Tesktil Sanayi İthalat İhracat ve Tic Ltd Şti | TR | In use | |
| SDW | Stiftung Dampfzentrum Winterthur | CH | In use | dampfzentrum.ch |
| SE | Förderverein Steigerwald-Express e.V | DE | In use | fv-steigerwald-express.de |
| SEA | Service des Essences des Armées | FR | In use | |
| SEAG | Schweizer Electronic AG | CH | In use | schweizer-electronic.ch |
| SEANT | SEANTO, S.L. | ES | In use | seanto.com |
| SEARL | SEA-RAIL NV | BE | In use | sea-invest.be |
| SEAS | Slovenské elektrárne a.s. | SK | In use | seas.sk |
| SEBUC | SUCURSALA ELECTROCENTRALE BUCURESTI | RO | In use | |
| SEG | SEGECO SRL | IT | In use | segecoitalia.com |
| SEH | Süddeutsches Eisenbahnmuseum Heilbronn | DE | In use | eisenbahnmuseum-heilbronn.de |
| SEHR | Stiftung Museumsbahn SEHR & RS | CH | In use | etzwilen-singen.ch/inhalt/Linie/Stiftung/Strecke.htm |
| SEHVW | SEH-Verwaltungs GmbH | DE | In use | |
| SEK | Hafen- und Bahnbetriebe der Stadt Krefeld / Städtische Eisenbahn Krefeld | DE | Revoked | krefeld.de |
| SEL | Schlünß Eisenbahn Logistik | DE | In use | sel-eisenbahn.de |
| SEM | Sächsisches Eisenbahnmuseum e.V | DE | In use | sem-chemnitz.de |
| SEMAT | SEMAT (Sociedad de Estudios y explotacion de Material Auxiliar de Transportes, S.A | ES | In use | semat.es |
| SEMBG | SEM Remont OOD | BG | In use | semremont.com |
| SEMI | SOCIEDAD ESPAÑOLA DE MONTAJES INDUSTRIALES | ES | In use | semi.es |
| SENDO | SENDOGAN Bahndienste GmbH | DE | In use | sendogan.de |
| SEPSA | Societá per l'Esercizio di Pubblici Servizi SpA | IT | Blocked | sepsa.it |
| SER | Proservis Ekspres Lojistik Hizmetleri San. Ve.Tic. A.Ş. | TR | In use | servicexpress.com.tr |
| SERCO | Serco Railtest | UK | Blocked | serco.co.uk |
| SERFI | SERFIRAT DEMIRYOLU TAŞIMACILIGI TICARET ANONIM ŞIRKETI | TR | In use | rayser.com.tr |
| SERSA | Sersa Group Management AG | CH | In use | sersa.ch |
| SERSD | Rhomberg Sersa Deutschland Südost GmbH | DE | In use | rhomberg-sersa.de |
| SERVI | SERVIFER XXI S.L. | ES | In use | serviferxxi.es |
| SES | SES Logistik GmbH | DE | Revoked | willke.com |
| SESAF | SES Aus- und Fortbildung e. K. | DE | In use | |
| SESKH | Stora Enso AB | SE | In use | storaenso.com |
| SET | South East Trains | UK | Blocked | |
| SETG | Salzburger Eisenbahn Transportlogistik GmbH | AT | In use | setg.at |
| SEV | SEV Schlesische Eisenbahnverkehrsmittel GmbH & Co KG | DE | In use | |
| SEVIL | SEVILLE RAIL RENT | PL | In use | |
| SFH | Schienenfahrzeuge Export - Import Handelsgesellschaft mbH - SFH | DE | In use | schienenfahrzeuge.de |
| SFI | SFH | IT | In use | sfiravenna.it |
| SFM | DB Schenker Italia S.r.l | IT | In use | rail.dbschenker.it |
| SFR | SERFER Servizi Ferroviari srl | IT | Revoked | serferonline.it |
| SFSM | Strade Ferrate Secondarie Meridionali | IT | Blocked | |
| SFT | SOCIETATEA FEROVIARA DE TURISM SFT CFR SA | RO | In use | turismferoviar.ro |
| SFTM | SIFI TM AGRO SA | RO | In use | |
| SFTRA | SOFTRANS SRL | RO | In use | softronic.ro |
| SFTRO | SOFTRONIC SRL | RO | In use | |
| SFW | Schienenfahrzeugwerk Delitzsch GmbH | DE | In use | |
| SFY | Safety4You Baustellenlogistik GmbH | AT | In use | s4you.at |
| SG | LHG Service Gesellschaft mbH | DE | In use | sg-luebeck.de |
| SGAG | Stahl Gerlafingen AG | CH | In use | stahl-gerlafingen.ch |
| SGB | Stoomtrein Goes-Borsele | NL | In use | destoomtrein.nl |
| SGC | SE.GE.CO. S.R.L. | IT | In use | |
| SGCPP | SAINT-GOBAIN CONSTRUCTION PRODUCTS POLSKA Sp. z o.o. | PL | Revoked | rigips.pl |
| SGFIT | SI.GI.FER SRL | IT | In use | sigifer.biz |
| SGG | Saint-Gobain Glass logistics | FR | In use | |
| SGL | SGL – Schienen Güter Logistik GmbH | DE | In use | sgl-net.de |
| SGPAM | SAINT-GOBAIN PAM | FR | In use | |
| SGR | SANGRITANA S.p.A. | IT | In use | sangritana.it |
| SGRF | SO.G.RA.F S.r.l | IT | In use | |
| SGS | Sonderzug Gastronomie Schuh | DE | In use | |
| SGTL | S.G.T.L. | FR | In use | |
| SGV | Svenska Godsvagnar AB | SE | In use | |
| SGW | SGW | FR | In use | |
| SH | Smalspåret i Hultsfred AB | SE | In use | smalsparet.nu/sh/ |
| SHB | Schleswig-Holstein Bahn | DE | In use | sh-bahn.de |
| SHD | Stichting Historisch Dieselmaterieel | NL | In use | dieseltreinen.nl |
| SHELF | Шелф ООД / Shelf OOD | BG | In use | |
| SHG | Kommanditgesellschaft S.H.G. Gleis- und Tiefbaugesellschaft mbH & Co. | DE | In use | shg-gleisbau.de |
| SHH | Städtische Häfen Hannover | DE | In use | |
| SHM | Stiftung Hamburg Maritim | DE | In use | stiftung-hamburg-maritim.de |
| SHMNL | B.V. Exploitatiemaatschappij Museumstoomtram | NL | In use | stoomtram.nl |
| SHR | Syrian Hidjaz Railway | SY | In use | hijazerail.com |
| SHS | SWS Seehafen Stralsund GmbH | DE | In use | seehafen-stralsund.de |
| SHTR | Alstom Traction BV | NL | In use | aIstom.com |
| SI | Sistemi Territoriali S.p.a. | IT | In use | sistemiterritorialispa.it |
| SICE | SOCIEDAD IBÉRICA DE CONSTRUCCIONES ELÉCTRICAS S.A. | ES | In use | sice.com |
| SIEAG | Siemens Mobility GmbH | DE | In use | siemens.com |
| SIEIT | Siemens Mobility S.r.L. | IT | In use | mobility.siemens.com/it/en.html |
| SIEKR | Siemens AG | DE | In use | siemens.com |
| SIESS | Siess Brennstoffe GmbH & Co KG | AT | In use | siess.cc |
| SILVA | SILVA LOGISTIC SERVICES SRL | RO | In use | |
| SIMAY | SIMAY DEMIRYOLU TAŞIMACLIK A.Ş. | TR | In use | alltraklojistik.com |
| SIMG | Simgen GmbH | DE | In use | |
| SIMIL | SIMiL500 | FR | In use | simil500.fr |
| SINTR | SERVICIOS INDUSTRIALES Y TRANSPORTES, S.A. | ES | In use | sintra-sa.es |
| SINZR | ŠINVOZ A.D., Zrenjanin | RS | In use | |
| SISFC | SISTEMAS Y MONTAJES INDUSTRIALES, S.A. | ES | In use | sistemsa.es |
| SITAV | SITAV SpA | IT | In use | sitav.eu |
| SITFA | SITFA S.p.A. (TO) | IT | In use | sitfa.net |
| SITIA | TRANSITIA RAIL | ES | In use | transitia.es |
| SITWN | Siemens AG Transformatorenwerk Nürnberg | DE | In use | energy.siemens.com |
| SJ | SJ AB | SE | In use | sj.se |
| SJVM | Statens Maritima och Transporthistoriska Museer | SE | In use | smtm.se |
| SJVT | Sydjyllands Veterantog | DK | In use | sjvt.dk |
| SK | Schollenberger Kampfmittelbergung GmbH | DE | Revoked | schollenberger.de |
| SKAJ | Stockholms Kultursällskap för Ånga och Järnväg | SE | In use | skaj.org |
| SKALK | SCHAEFER KALK GmbH & CO. KG | DE | In use | schaeferkalk.de |
| SKANE | Skånetrafiken | SE | In use | skanetrafiken.se |
| SKANS | Skanska a.s. | CZ | In use | |
| SKASK | Skanska SK a.s. | SK | In use | skanska.sk |
| SKB | UAB SKINEST BALTIJA | LT | In use | skinest.lt |
| SKBIN | Budamar Innovations, a.s. | SK | In use | budamar.sk |
| SKG | "Srbija kargo" a.d. / JSC Serbia Cargo / | RS | In use | srbcargo.rs |
| SKHT | SK – H Trans, s. r. o. | SK | In use | skhtrans.sk |
| SKINE | Skinest Rail AS | EE | In use | skinest.ee |
| SKJ | Skånska Järnvägar AB | SE | In use | skanskajarnvagar.se |
| SKJAB | Skövde Karlsborgs Järnväg AB | SE | In use | |
| SkJb | Skandinaviska Jernbanor AB | SE | In use | |
| SKL | Stichting Klassieke Locomotieven | NL | In use | klassieke-locs.nl |
| SKLJ | Skara-Lundsbrunns Järnvägar | SE | In use | sklj.se |
| SKLUS | SKL Schienen Komplex Logistik Magdeburg GmbH & Co. KG | DE | In use | schienen-komplex-logistik.de |
| SKM | „СКМ Интернешънъл” ЕАД | BG | In use | |
| SKMT | PKP Szybka Kolej Miejska w Trojmiescie Sp. Z o.o. | PL | In use | skm.pkp.pl |
| SKMWA | Szybka Kolej Miejska Sp. z o.o. | PL | In use | |
| SKNAA | SKANSKA S.A. | PL | In use | skanska.pl |
| SKOTR | ŠKODA AUTO a.s. | CZ | In use | |
| SKPL | SKPL Cargo Sp. z o.o | PL | In use | shortlines.pl |
| SKS | SKS Krnov, a.s. | CZ | In use | |
| SKSM | Suwalskie Kopalnie Surowców Mineralnych sp. z o.o. | PL | In use | sksm.suwalki.pl |
| SKT | Axess Logistics Sweden AB | SE | Revoked | axesslogistics.se |
| SL | Storstockhoms Lokaltrafik | SE | In use | sl.se |
| SLB | Salzburg AG für Energie, Verkehr und Telekommunikation - Salzburger Lokalbahn | AT | In use | salzburg-ag.at |
| SLCF | SALCEF S.p.A. | IT | In use | salcef.com |
| SLG | SLG Spitzke Logistik GmbH | DE | In use | spitzke.com |
| SLM | SLM GmbH, Schorno Locomotive Management | CH | In use | |
| SLMAG | Slovmag a.s. | SK | In use | slovmag.sk |
| SLOVN | SLOVNAFT, a.s. | SK | In use | slovnaft.sk |
| SLRS | Salzland Rail Service GmbH | DE | In use | salzland-rail-service.de |
| SLTS | Silverlink Train Services | UK | Blocked | silverlink-trains.co.uk |
| SLTU | Slovenské tunely, a.s. | SK | In use | slottunely.sk |
| SLVAG | SLOV-VAGON, a.s. | SK | In use | |
| SLVY | Solvay Bulgaria AD / Солвей България АД | BG | In use | |
| SLZHN | SLZ CHÉMIA, a.s. | SK | In use | slzchemia.sk |
| SM | Scandinavian Motortransport AB | SE | In use | motortransport.se |
| SMART | SMART CORPORATION s.r.o. | SK | In use | |
| SMCF | Sercice Militaire des Chemines de Fer | FR | In use | |
| SMD | SLEZSKOMORAVSKÁ DRÁHA a.s. | CZ | In use | slezskomoravskadraha.cz |
| SMG | Sersa Maschineller Gleisbau AG | CH | In use | sersa.ch |
| SMILL | s-milling technologies GmbH | DE | In use | s-milling.com |
| SMKJS | Stowarzyszenie Miłośników Kolei w Jaworzynie Śląskiej | PL | In use | smkjaworzyna.pl.tl |
| SMNS | SIEMENS MOBILITY SL | ES | In use | mobility.siemens.com/es/es.html |
| SMOK | Svenska Motorvagnsklubben | SE | In use | |
| SMR | SMR S.A. | RO | In use | smr.ro |
| SMS | Sachtleben Mining Services GmbH | DE | In use | |
| SMT | AB Sandvik Materials Technology | SE | In use | smt.sandvik.com |
| SMTRA | SOMETRA SA | RO | In use | sometra.ro |
| SMZ | Slovenské magnezitové závody, akciová spoločnosť, Jelšava | SK | In use | smzjelsava.sk |
| SNALL | Snälltåget AB | SE | In use | snalltaget.se |
| SNCB | Société Nationale des Chemins de fer Belges | BE | In use | sncb.be |
| SNCF | SNCF Voyageurs | FR | In use | sncf.fr |
| SNCFC | SNCF RESEAU Circulation Ferroviaire | FR | In use | |
| SNCFR | SNCF Réseau | FR | In use | sncf-reseau.fr |
| SNCFT | Société Nationale des Chemins de Fer Tunésiens | TN | In use | sncft.com.tn |
| SNG | Singergon Petroleum | BG | In use | |
| SNL | Sven Neunzig | DE | In use | |
| SNSRV | SOCIETATEA NATIONALA A SARII SA - SUCURSALA EXPLOATARE MINIERA RM. VALCEA | RO | In use | salvir.ro |
| SNSSP | SUCURSALA NATIONALA A SARII SA - SUCURSALA SALINA PRAID | RO | In use | salinapraid.ro |
| SNTFC | SNTFC " CFR CALATORI " SA | RO | In use | cfrcalatori.ro |
| SO | Serco Railtest | UK | Blocked | serco.co.uk |
| SOB | Schweizerische Südostbahn AG | CH | In use | suedostbahn.ch |
| SOBET | Sobetra, a.s. | SK | In use | sobetra.sk |
| SOBIE | Destylarnia Sobieski S.A. | PL | In use | |
| SOCAR | Przedsiębiorstwo Inżynieryjne SOCAR sp. z o.o. sp. k. | PL | In use | socar.com.pl |
| SOCO | SOCOMAC | FR | In use | soufflet.com |
| SOCRF | SOCORAIL | FR | In use | europorte.com |
| SOEG | Sächsisch-Oberlausitzer Eisenbahngesellschaft | DE | In use | soeg-zittau.de |
| SOF | SOFISTIK SERVIS s.r.o. | CZ | In use | sofistikservis.cz |
| SOG | SOLVAY ÖSTERREICH GmbH | AT | In use | solvay.at |
| SOGE | SNC SOGEWAG | FR | In use | stva.com |
| SOK | Sokacz GmbH & Co. KG | DE | In use | sokacz.com |
| SOLCH | Solvay (Schweiz) AG | CH | In use | solvay.ch |
| SOMAF | Somafel, Engenharia e Obras Ferroviárias, S.A. | PT | In use | somafel.pt |
| SONRA | Sonata Rail Invest GmbH | DE | In use | sonata-management.com |
| SOR | Sortera, s.r.o. | SK | In use | |
| SOREC | Solenthaler Recycling AG | CH | In use | sorec.ch |
| SOT | SOTRAMEST | FR | In use | |
| SOZ | SPOLEK PRO OCHRANU ŽELEZNIC - ŤRISTAOSMIČKA, Z.S. | CZ | In use | |
| SP | Slovenská pošta, a.s. | SK | In use | slposta.sk |
| SPACE | Spacetec Datengewinnung GmbH | DE | In use | spacetec.de |
| SPAG | SPITZKE SE | DE | In use | spitzke.com |
| SPAP | Slovenská plavba a prístavy a.s. | SK | In use | spap.sk |
| SPCH | Spolek pro chemickou a hutní výrobu, akciová společnost | CZ | In use | |
| SPDZ | Spoločnosť Považskej Dráhy Žilina | SK | In use | spdz.estranky.sk |
| SPEBE | Spektra, spol. s r.o. | CZ | In use | |
| SPEED | Speed Sp. Z o.o. | PL | In use | speed.gdynia.pl |
| SPENO | Speno International S.A. | CH | In use | speno.ch |
| SPIN | SPINELLI (ETS) | FR | In use | |
| SPITZ | SPITZKE AG GUZ Berlin | DE | Revoked | spitzke.de |
| SPL | SPL Powerlines Sverige AB | SE | In use | splpowerlines.se |
| SPLA | SPL-Powerlines GmbH & Co KG | AT | In use | powerlines-group.com |
| SPLE | SPL EisenbahnVerkehr GmbH | DE | In use | spl-ev.de |
| SPLG | SPL Powerlines Germany GmbH | DE | In use | powerlines-group.com |
| SPOL | Siemens Mobility Sp. z o.o. | PL | In use | siemens.pl/mobility |
| SPS | Spitzke Spoorbouw | NL | In use | spitzke.nl |
| SPSAB | ScanPole Sverige AB | SE | In use | scanpole.com |
| SPSPM | Piotr Mieczkowski AUTORYZOWANA STACJA OBSŁUGI SERWIS POJAZDÓW SZYNOWYCH | PL | In use | |
| SPSSK | Serwis Pojazdów Szynowych sp. z o.o. sp. k. | PL | In use | |
| SPU | Spiess-Urania Chemicals GmbH | DE | In use | spiess-urania.com |
| SPW | Société Propriétaire des Wagons | FR | In use | viia.com |
| SPYFA | Spyfa Tec GmbH | CH | In use | spyfatec.ch |
| SPZ | Südbayeriches Portland-Zementwerk, Gebr. Wiesböek & Co GmbH | DE | In use | |
| SPZCT | Společnost železniční při DKV Česká Třebová, z.s. | CZ | In use | spolzel.cz |
| SR | ScotRail Railways | UK | Blocked | scotrail.co.uk |
| SRA | S-Rail GmbH | DE | In use | |
| SRAG | Stettler AG Biel Studen | CH | In use | stettlerag.ch |
| SRAIL | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com/de/ |
| SRB | Südburgenländische Regionalbahn | AT | In use | maerchenbahn.at |
| SRC | SWISS RAIL CARRIER AG - SRC® | CH | In use | swissrailcarrier.ch |
| SRCM | Swiss Rail Car Management GmbH | CH | In use | |
| SREQ | SIDERURGICA REQUENA, S.A. | ES | In use | |
| SRFL | STRABAG Rail Fahrleitungen Gmbh | DE | In use | strabag-rail.com |
| SRG | Saar Rail GmbH | DE | In use | saarrail.de |
| SRI | SRI Rail Invest GmbH | DE | In use | |
| SRJmf | Museiföreningen Stockholm-Roslagens Järnvägar | SE | In use | srjmf.se |
| SRKS | Strukton Rail GmbH & Co KG | DE | In use | strukton.de |
| SRL | Stahlberg Roensch Leipzig GmbH | DE | Revoked | vossloh-rail-services.com |
| SRM | Strukton Railinfra Materieel | NL | In use | struktonrailfra.com |
| SRN | Sanirail Nürnberg Gleis und Tiefbau GmbH | DE | In use | sanirail-nuernberg.de |
| SRO | Saudi Railways Organization | SA | In use | saudirailways.org |
| SRPS | Scottish Railway Preservation Society | UK | In use | srps.org.uk |
| SRR | Stricker Rose Rail GmbH | DE | In use | sr-rail.de |
| SRS | SRS Rail Servis GmbH | DE | In use | srs-railservice.de |
| SRSDE | Stadler Rail Service Deutschland GmbH | DE | In use | stadlerrail.com |
| SRSEU | Sperry Rail | UK | In use | sperryrail.com |
| SRSG | SRS Sjölanders AB | SE | In use | srsroadrail.se |
| SRSVN | Schenker | SI | In use | schenker.si |
| SRT | Schörling Rail Tech GmbH | DE | Revoked | schoerling-railtech.de |
| SRTAG | Swiss Rail Traffic AG | CH | In use | |
| SRTF | SRT S.r.l. | IT | In use | srtfano.com |
| SRTWO | SRT Schrott Recycling Thüringen GmbH | DE | In use | |
| SRVBA | CFR SIRV BRASOV SA - PL AIUD | RO | In use | |
| SSAB | SSAB EMEA AB | SE | In use | ssab.se |
| SSCR | SLADOVNY SOUFFLET ČR a.s. | CZ | In use | slad.cz |
| SSHR | Správa státních hmotných rezerv | CZ | In use | |
| SSIF | Società Subalpina di Imprese Ferroviarie S.p A | IT | In use | vigezzinacentovalli.com |
| SSJF | Skåne-Smålands Järnvägsmuseiförening | SE | In use | ssjf.se |
| SSN | Stoom Stichting Nederland | NL | In use | stoomstichting.nl |
| SSOX | SSAB Oxelösund | SE | In use | ssab.com |
| SSRT | Trafikverket, Fordonsresurser | SE | In use | trafikverket.se |
| SSSEM | CCC CEM PEЙЛ ООД | BG | In use | |
| SSSNK | 3S Nakliyat Madencilik Sanayi ve Ticaret Anonim Şirketi | TR | In use | yildizlarsssholding.com.tr |
| SST | Sneider Stahlbau AG | CH | In use | stahlbau.ch |
| SSZV | Ing. Lukáš Volek | CZ | In use | stavitelstvivolek.cz |
| ST | Sursee-Triengen Bahn AG | CH | In use | dampfzug.ch |
| STA | Stahlberg Track Asset GmbH & Co. KG | DE | Revoked | vossloh-rail-services.com |
| STAB | Svensk Tågkraft AB | SE | In use | tagkraft.com |
| STADS | Stadler Service AG | CH | In use | stadlerrail.com |
| STAG | Stadler Bussnang AG | CH | In use | stadlerrail.com |
| STAL | Siemens Transformers Austria GmbH & Co KG | AT | In use | siemens.com |
| STAP | Stadler Deutschland GmbH | DE | In use | stadlerrail.de |
| STARK | Starkenberger Güterlogistik GmbH | DE | In use | starkenberger-gueterlogistik.de |
| START | MÁV-START ZRt. | HU | In use | |
| STASY | Urban Rail Transport S.A. | EL | In use | stasy.gr |
| STAUB | STAUB& CO Chemiehandelsgesellschaft mbH | DE | Revoked | staubco.de |
| STAV | STAV GmbH | DE | In use | stav-gmbh.de |
| STAVA | STADLER RAIL VALENCIA S.A.U. | FR | In use | stadlerrail.com |
| STB | Süd-Thüringen-Bahn GmbH | DE | In use | sued-thueringen-bahn.de |
| STBA | Stalserwis Batory sp. z o.o. | PL | In use | stalserwis.pl |
| STBAT | Steiermarkbahn Transport & Logistik GmbH | AT | In use | steiermarkbahn.at |
| STBPV | Steiermarkbahn und Bus GmbH | AT | In use | |
| STD | Stemberg-Deters Umweltservice GmbH | DE | In use | |
| STDE | Stichting DE-III | NL | In use | stichtingde3.nl |
| STE | Société des Trains Exposition | FR | In use | trains-expo.fr |
| STEAM | Rent a Lok Aps | DK | In use | rentalok.dk |
| STEB | Steirische Erlebnisbahn | AT | In use | stmk-erlebnisbahn.at |
| STEC | STECONFER, SA | PT | In use | |
| STEEL | VÍTKOVICE STEEL, a.s. | CZ | In use | |
| STEF | Stefen GmbH & Co. KG | DE | In use | hermannstefen.de |
| STEG | Radek Mansfeld | CZ | In use | |
| STENA | Stena Gotthard AB | SE | In use | stenagotthard.se |
| STENO | "STENO v.o.s." - stavební a inženýrská činnost kolejové dopravé | CZ | In use | |
| STGBS | Stuttgarter Bahnservice Ltd. | DE | In use | stuttgarter-bahn.de |
| STH | Stern & Hafferl Verkehrsgesellschaft mbH | AT | In use | stern-verkehr.at |
| STI | SERVTRANS INVEST S.A. | RO | In use | servtrans-invest.com |
| STK | STK S.A. | PL | In use | stk.wroc.pl |
| STLB | Steiermärkische Landesbahnen | AT | In use | stlb.at |
| STLEU | Stadt Leutershausen | DE | In use | leutershausen.de |
| STM | Rail STM Sp. Z o.o. | PL | In use | railst.pl |
| STMC | SERVTRANS MENTENANCE SA | RO | In use | |
| STOCK | Stock-Transport | DE | In use | |
| STP | Sigma Tabor Sp. z o.o. | PL | In use | sigmatabor.pl |
| STPHA | SPEDI-TRANS Praha, s.r.o. | CZ | In use | |
| STR | Strukton Rail | SE | In use | strukton.se/default.aspx |
| STRA | Strabag AG | AT | In use | strabag.com |
| STRAG | Schöni Transport AG | CH | In use | schoeni.ch |
| STRPL | STRABAG sp. z o.o. | PL | In use | |
| STRU | Hans Strube Gleisbau, Hochbau Tiefbau GmbH | DE | In use | strubebau.de |
| STRVA | Strabag Vasútépitö Kft. | HU | In use | |
| STRW | Southern Railway | UK | In use | southernrailway.com |
| STS | Städtebahn Sachsen GmbH | DE | In use | staedtebahn.de |
| STSI | STSI | FR | In use | |
| STSL | STS Logistic sp. z o.o. | PL | In use | stslogistic.com.pl |
| STSLM | Siemens Transportation System Locomotives | DE | In use | transportion.siemens.com |
| STT | Svensk Tågteknik AB | SE | In use | stt-train.se |
| STTRA | Statnett Transport AS | NO | In use | statnett-transport.no |
| STVA | CAT France | FR | Correction | groupecat.com |
| STVG | Stauden -Verkehrs-GmbH | DE | In use | bbgstauden.de |
| STW | Verein Seetal-Wagen STW | CH | Revoked | seetal-wagen.ch |
| STWB | Steigerwaldbahn | DE | In use | |
| SUAR | Danisco Sugar Arlöv | SE | In use | daniscosugar.com |
| SUAS | SUAS Transportation Service s.r.o. | CZ | In use | suas-transportation.cz |
| SUCAQ | SUCRE AQUITAINE | FR | In use | |
| SUD | Správa Ústecké dráhy s.r.o. | CZ | In use | usteckadraha.cz |
| SUMAF | Storumans Ångtågsförening | SE | In use | storumanloket.se |
| SUND | Sundström Ab Oy, Entreprenad | FI | In use | sundstroms.fi |
| SUNR | SUNRAIL GbR | DE | In use | |
| SUP | Sturm & Partner GbR | DE | In use | |
| SV | Joint Stock Company for Passenger Railway Transport "Srbija voz" a.d. | RS | In use | srbvoz.rs |
| SVB | Städtische Verkehrsbetriebe Bern (BERNMOBIL) | CH | In use | bernmobil.ch |
| SVC | Sonderzugveranstaltungen Chemnitz | DE | In use | zugparty.de |
| SVDJS | „EC BИ ДИ ГРУП” ΑД | BG | In use | |
| SVECO | SVECO S.P.A. | IT | In use | svecospa.it |
| SVF | Scala Virgilio & Figli S.p.A. | IT | In use | |
| SVG | Schienenverkehrsgesellschaft mbH | DE | In use | svgmbh.com |
| SVP | Associazione Società Veneta Ferrovie APS | IT | In use | societavenetaferrovie.it |
| SVSA | „СΒИЛОЦЕЛ" EАД | BG | In use | svilosa.bg |
| SVT | Förderverein Diesel-Schnelltriebwagen (SVT) e.V. | DE | In use | svt-koeln.de |
| SVTG | SVT Görlitz gGmbH i.G. | DE | In use | |
| SVVR | Spolok Výhrevne Vrútky, občianske združenie | SK | In use | vyhrevna-vrutky.sk |
| SW | South West Trains | UK | Blocked | swtrains.co.uk |
| SWA | Stadtwerke Andernach GmbH | DE | In use | stadtwerke-andernach.de |
| SWEG | SWEG Südwestdeutsche Landesverkehrs-GmbH | DE | In use | sweg.de |
| SWI | SWIETELSKY CONSTRUCTII FEROVIARE SRL | RO | In use | swietelsky.com |
| SWIE | Swietelsky AG - ZNL Bahnbau | AT | In use | swietelsky.at |
| SWIRP | Swietelsky Rail Polska sp. z o.o. | PL | In use | swietelskyrail.pl |
| SWIVT | Swietelsky Vasúttechnika Kft | HU | In use | vasuttechnika.hu |
| SWK | SWK MOBIL GmbH | DE | In use | swk.de |
| SWM | SweMaint | SE | In use | swemaint.se |
| SWO | Stadtwerke Osnabrück AG | DE | In use | stadtwerke-osnabrueck.de/ehb |
| SWR | SWISSRAIL S.A. | CH | In use | |
| SWRCZ | SWIETELSKY Rail CZ s.r.o. | CZ | In use | swietelsky.cz |
| SWRTT | Schotterwer Röblingen GmbH | DE | In use | |
| SWS | Stadtwerke Schweinfurt GmbH | DE | In use | stadtwerke-sw.de |
| SWSST | Bayer Cropscience SA-NV | BE | In use | |
| SWSVO | SWS spol. s r.o. | SK | In use | sws.sk |
| SWT | Stahlwerk Thüringen GmbH | DE | In use | stahlwerk-thueringen.de |
| SWTAB | SWT Swedtrac Trafik AB | SE | In use | swedtrac.com |
| SWTR | Swisstrain SA | CH | In use | swisstrain.ch |
| SYN | Syntus | NL | Revoked | syntus.nl |
| SZ | Slovenske Zeleznice D.D. | SI | In use | slo-zeleznice.si |
| SZA | "Sviloza" AD / "Свилоза" АД | BG | In use | |
| SZCZ | Správa železnic, státní organizace | CZ | In use | szdc.cz |
| SZD | SLEZSKÉ ZEMSKÉ DRÁHY, o.p.s. | CZ | In use | |
| SZDS | Slovenská železničná dopravná spoločnosť, a.s. | SK | In use | szds.sk |
| SZEPA | Szepaniak Oy | FI | In use | szepaniak.fi |
| SZEVA | Strabag Rail Kft. | HU | In use | |
| SZR | Śląskie Zaplecze Remontowe Sp. z o.o. | PL | In use | szrprzezchlebie.com.pl |
| SZTP | SŽ – Tovorni promet, d.o.o | SI | In use | slo-zeleznice.si/sl/tovorni-promet |
| SZU | Sihltal Zürich Uetliberg Bahn SZU | CH | In use | szu.ch |
| SZVJ | Společnost železniční výtopna Jaroměř, z.s. | CZ | In use | vytopnajaromer.cz |
| TAB | Tågfrakt AB | SE | In use | tagfrakt.se |
| TABOR | Tabor Dębica Sp. z o.o. | PL | In use | tabor-debica.pl |
| TAE | Transalpin Eisenbahn AG | CH | Revoked | captrain.de |
| TAFAG | Tafag AG | CH | In use | tafag.ch |
| TAGAB | Tågåkeriet i Bergslagen AB | SE | In use | |
| TAL | Talbot-Services GmbH | DE | In use | talbot-services.com |
| TALDE | Talgo (Deutschland) Gmbh | DE | In use | talgo.de |
| TALE | Talleres Alegría, s.a. | ES | In use | talegria.com |
| TALGO | PATENTES TALGO, S.L. | ES | In use | talgo.com |
| TAM | TAMOIL SA, Raffineries de Collombey | CH | In use | |
| TANK | SO, GE, TANK SPA | FR | In use | |
| TAPO | Tatravagónka a.s. Poprad | SK | In use | tatravagonka.sk |
| TASWR | TAS Trade&Service Krzysztof Rak | PL | In use | tastrade.pl |
| TAU | TAU Tanklager Auhafen AG | CH | In use | tau-ag.ch |
| TAVBE | Taveirne algemene onderneming NV | BE | In use | taveirne.be |
| TAZA | TABAPOL Tarnówka sp. j. | PL | In use | |
| TB | TURBO RAIL SERVICE SRL | RO | In use | |
| TBDDP | „Дaйнинг eнepджи” ЕООД | BG | In use | |
| TBDTP | „ТБД - Тoвapни прeвoзи” EАД | BG | In use | |
| TBG | Tegernseebahn-Betriebsgesellschaft | DE | In use | tegernsee-bahn.de |
| TBL | TRANSBLUE S.R.L. | RO | In use | |
| TBR | Touristenbahnen im Rheinland GmbH | DE | In use | selfkantbahn.de |
| TC | T&C sp. z o. o. | PL | In use | tc.org.pl |
| TCA | Terminal Athus | BE | In use | tca.be |
| TCDD | Türkiye Cumhuriyeti Devlet Demiryollari Isletmesi | TR | In use | tcdd.gov.tr |
| TCDDT | TÜRKİYE CUMHURİYETİ DEVLET DEMİR YOLLARI TAŞIMACILIK A.Ş. GENEL MÜDÜRLÜĞÜ | TR | In use | tcddtasimacilik.gov.tr/ |
| TCNFR | TECNOFER S.P.A. | IT | In use | tecnoferspa.com |
| TCS | Train Charter Services B.V. | NL | In use | traincharter.eu |
| TD | Transdev Regio GmbH | DE | In use | transdev.de |
| TDH | Transdev Hannover GmbH | DE | In use | sbahn-hannover-2022.de |
| TDKP | Tomasz Neumann NEU-TRANS-TEL Przedsiębiorstwo Usługowo-Handlowo-Transportowe | PL | In use | |
| TDKPL | TDK PLUS sp. z o.o. | PL | In use | |
| TDM | Transdev Mitteldeutschland GmbH | DE | In use | |
| TDR | Transregio Deutsche Regionalbahn | DE | In use | trans-regio.de |
| TDRO | Transdev Regio Ost GmbH | DE | In use | mitteldeutsche-regiobahn.de |
| TDRR | Transdev RheinRuhr GmbH | DE | In use | transdev.de |
| TDZ | Tajikistan Railways (TДЖ) | TJ | In use | |
| TE | Stadtwerke Trossingen - Trossinger Eisenbahn | DE | In use | swtro.de |
| TEC | TecSol Switzerland AG | CH | In use | tecsol.ch |
| TECO | EUROVIA Beton GmbH | DE | In use | teco-schallschutz.de |
| TECSA | TECSA EMPRESA CONSTRUCTORA, S.A. | ES | In use | tecsa.es |
| TECYR | TECYR CONSTRUCCIONES Y REPARACIONES, S.A. | ES | In use | tecyrsa.com |
| TECZW | TECKLENBORG GmbH & Co. KG | DE | Revoked | tecklenborg.de |
| TEE | TransEuropEisenbahn AG | CH | In use | transeurop.ch |
| TEECL | Verein TEE-CLASSICS | CH | In use | tee-classics.ch |
| TEF | TRANS EXPEDITION FEROVIAR S.R.L. | RO | In use | tef.com.ro |
| TEFLF | LOGISTICA FEROVIARA SRL | RO | Revoked | |
| TEGRA | TEGRAD d.o.o. | SI | In use | tegrad.si |
| TEJO | Tejo Energia - Produção e Distribuição de Energia Eléctrica, S.A. | PT | In use | tejoenergia.com |
| TEK | TEK SRL | RO | In use | |
| TEKCO | TEKNO CONSTRUZIONI SRL | IT | In use | dadiutorio.it |
| TEKOL | TEKOL sp. z o.o. | PL | In use | tekol.pl |
| TEL | Touristik-Eisenbahn Lüneburger Heide GmbH | DE | In use | heide-express.de |
| TELIC | TELEFONOS LINEAS Y CENTRALES | ES | In use | telice.es |
| TEMF | TEMFERRO | FR | In use | tso.fr |
| TEMMZ | Tessta s.r.o. | CZ | In use | tessta.cz |
| TEMSK | TEMPRA s.r.o. | SK | In use | tempra.sk |
| TENT | Privredno drustvo "Termoelektrane Nikola Tesla" d.o.o. | RS | In use | tent.rs |
| TER | TPER S.p.A | IT | In use | tper.it |
| TERAS | Teräspyörä Oy | FI | In use | steelwheel.fi |
| TESBG | Транселстрой” ЕООД | BG | In use | transelstroi.eu |
| TETT | Trains & Traction | FR | In use | traindesmouettes.fr |
| TEUGL | TRANSEUROPA PORT SA - SUCURSALA DROBETA TR. SEVERIN | RO | In use | teu-group.ro |
| TEV | Thüringer Eisenbahnverein Weimar e.V. | DE | In use | thueringer-eisenbahnverein.de |
| TFB | FERRE BARBERAS.L. | ES | In use | |
| TFC | TRANSFEROVIAR CALATORI SRL | RO | In use | |
| TFCH | Thommen-Furler AG | CH | In use | thommen-furler.ch |
| TFE | Dispo-Tf Education GmbH | DE | In use | dispo-tf.de |
| TFEF | Time Fret Express France | FR | In use | |
| TFF | TRAVAUX FERROVIAIRES FRANCAIS | LU | In use | tt-group.lu |
| TFG | TRANSFEROVIAR GRUP S.A. | RO | In use | transferoviar.ro |
| TFI | FEROTRANS TFI SRL | RO | In use | |
| TFT | Train4Train GmbH | DE | In use | train4train.com |
| TGOJ | TGOJ Trafik AB | SE | Revoked | tgojtrafik.se |
| TGR | T G R Rostock Tief-, Gleis-, Straßen-, Kabelleitungs- und Ingenieurbau GmbH | DE | In use | tgr-gmbh.de |
| THADE | Thales Deutschland GmbH | DE | In use | thalesgropu.com/de/europe/deutschland |
| THAG | Thommen AG | CH | In use | thommen-recycling.ch |
| THAPL | Thales Polska sp. z o.o. | PL | In use | thalesgroup.com |
| THB | Thurbo AG | CH | In use | thurbo.ch |
| THE | Thüringer Eisenbahn | DE | In use | thueringer-eisenbahn.de |
| THF | TEHNOTRANS FEROVIAR SRL | RO | In use | |
| THG | THG Baugesellschaft mbH | DE | In use | thg-baugesellschaft.de |
| THI | THI Factory | BE | In use | thalys.com |
| THIEL | N. Thieltges GmbH & Co. KG | DE | In use | thieltges-bau.de |
| THL | Thévenaz-Leduc SA | CH | In use | barec.ch |
| THM | Train Hungary Magánvasút Kft | HU | In use | trainhungary.hu |
| THRM | TORHAMER Maciej Chamerski | PL | In use | torhamer.pl |
| TI | Trenitalia S.p.A. | IT | In use | trenitalia.it |
| TIB | Tåg i Bergslagen | SE | In use | |
| TILO | TILO SA | CH | In use | |
| TIM | TIM Rail Eisenbahngesellschaft mbH | DE | In use | tim-logistik.de |
| TIS | TRANSFER INTERNATIONAL SPEDITION SRL | RO | In use | tts-group.ro |
| TJF | Tjustbygdens Järnvägsförening | SE | In use | smalsparet.se |
| TJM | Tezhka Zhelezopatna Mehanizatzia EAD | BG | In use | |
| TK | Cargorail - Transportes de Mercadorias, S.A. | PT | In use | |
| TKAB | Svenska Tågkompagniet AB | SE | In use | tagkompaniet.se |
| TKB | TKB Tief- und Kabelbau GmbH | DE | In use | tkb-bau.de |
| TKGFT | Thyssen Krupp Gft Gleistechnik Gmbh | DE | In use | |
| TKLS | Thyssen Krupp GFT Gleistechnik GmbH | DE | In use | tkgftgleistechnik.de |
| TKM | TECHNI KOL Małgorzata Gawlik | PL | In use | techni-kol.pl |
| TKMLT | ThyssenKrupp Materials d.o.o., Inđija | RS | In use | |
| TKPS | TKP Silesia Spółka z ograniczoną odpowiedzialnością Sp. K. | PL | In use | tkpsilesia.pl |
| TKSGE | Tyczka Kohlensäure GmbH & Co KG | DE | Revoked | tyczka-gase.de |
| TKU | TKU GmbHTiefbau- Kabelbau-Umwelttechnik GmbH | DE | In use | tku-gmbh.de |
| TL | TL Train Logistic GmbH | DE | In use | tl-logistic.com |
| TLCRG | Transport line Cargo s.r.o. | CZ | In use | transportline.eu |
| TLG | Transport und Logistik GmbH | DE | In use | tlg-ag.de |
| TLLOC | Transport line Locomotive s.r.o. | CZ | In use | transportline.eu |
| TLOK | PHU TOM-LOK Tomasz Plata | PL | In use | |
| TLS | ALSTOM Transport Deutschland GmbH | DE | In use | alstom.com |
| TLSA | Transports Publics de la Région Lausannoise sa | CH | In use | t-l.ch |
| TLSDY | TLS DEMİRYOLU TAŞIMACILIĞI TICARET A.Ş. | TR | In use | tlslojistik.com |
| TLSK | Tatra-Leasing, s.r.o. | SK | In use | tatraleasing.sk |
| TLSSK | TransLog Slovakia, a.s. | SK | In use | translog.sk |
| TLV | Talvivaaran Kaivososakeyhtiö Oyj | FI | Revoked | talvivaara.com |
| TLVG | Trainlog GmbH | DE | In use | trainlog.at |
| TLVKP | Talvivaara Sotkamo Oy:n konkurssipesä | FI | In use | talvivaara.com |
| TLWSK | TransLog Wagon, s.r.o. | SK | In use | translog.sk |
| TM | Transchem Sp. zo. o. | PL | In use | transchem.com.pl |
| TMAS | TARALDSVIK Maskin AS | NO | In use | taraldsvik.no |
| TMB | Tramway du Mont Blanc | FR | Revoked | |
| TME | Torsten Meincke Eisenbahn GmbH | DE | In use | |
| TMEC | Tesmec Rail | FR | In use | tesmec.com |
| TMF | T.M.F. SA | FR | In use | |
| TMH | TMH Services GmbH | DE | In use | tmh.international/en |
| TMK | TMK - RESITA S.A. | RO | In use | tmk-artrom.ro |
| TMKA | TMK-ARTROM SA | RO | In use | tmk-artrom.ro |
| TMMM | T3M | FR | In use | t3m.fr |
| TMR | TMR Transports de Martigny et Régions SA | CH | In use | tmrsa.ch |
| TMRAB | TMRail AB | SE | In use | tmrail.se |
| TMT | Transmart Trains Limited | UK | In use | transmarttrains.com |
| TMW | Technisches Museum Wien | AT | In use | tmw.at |
| TN | TRENORD | IT | In use | trenitalialenord.it |
| TNI | TN International | FR | In use | areva.com |
| TNR | Tenor S.r.l. | IT | In use | inrail.it |
| TNT | Association Train Nostalgique de la Vallée du Trient (TNT) | CH | In use | |
| TNTD | Tenutado SK, a.s. | SK | In use | |
| TOBI | Schmiedewaren Biller | DE | In use | |
| TOELN | Tölner GmbH | DE | In use | |
| TOOZ | Technická obnova a ochrana železníc a.s | SK | In use | |
| TOR | TORPOL S.A. | PL | In use | torpol.pl |
| TORAM | TORAMOS s.r.o. | CZ | In use | toramos.cz |
| TORK | TORKAM sp. z o.o. | PL | In use | torkam.eu |
| TORO | Przedsiębiorstwo “TORO” Piotr Kowalski Sp. Komandytowa | PL | In use | |
| TORRE | Tor- Rent Konrad Adamkiewicz | PL | In use | tor-rent.pl |
| TORW | Andrzej Kierna TORWAG | PL | In use | |
| TOUAX | TOUAX RAIL LIMITED | FR | In use | touaxrail.com |
| TOVA | TRAKCE, a.s. | CZ | In use | |
| TOZK | Towarzystwo Ochrony Zabytków Kolejnictwa i Organizacji Skansenów Pyskowice | PL | In use | tozk.pl |
| TP | TRASPORTI PESANTI SRL | IT | In use | pesantisrl.it |
| TPAS | Trainpoint Norway AS | NO | In use | |
| TPC | Transports Publics du Chablais SA | CH | In use | tpc.ch |
| TPCF | TPCF, Train du Pays Cathare et du Fenouillèdes | FR | In use | tpcf.fr |
| TPCZ | TransPlus (Česko) | CZ | In use | |
| TPF | Transports publics fribourgeois | CH | In use | tpf.ch |
| TPFI | Transports publics fribourgeois Infrastructure (TPF INFRA) SA | CH | In use | tpf.ch |
| TPG | Transports publics genevois (TPG) | CH | In use | tpg.ch/ |
| TPI | Terminal Piacenza Intermodale S.r.l. | IT | In use | "hupac.com/EN/Terminal-Piacenza-Intermodale |
| TPL | Toplivo PLC / Топливо АД | BG | In use | |
| TPLN | „TPAHC-ПOPT-ЛEЙH” OOД | BG | In use | |
| TPN | Totalprosjekt Namsskogan AS | NO | In use | totalprosjekt-namsskogan.no |
| TPPBD | TEЦ Bobov dol-EAД | BG | In use | |
| TPPMR | „TEЦ- Mapицa 3” АД | BG | In use | |
| TPSVK | TransPlus (Slovensko) s.r.o. | SK | In use | |
| TPX | Trans-Pennine Express | UK | Blocked | firstgroup.com/tpexpress |
| TR | TR Trans Rail AG | CH | In use | tr-transrail.ch |
| TRA | TRATEC-SK s.r.o. | SK | In use | |
| TRAAL | TRANSMODAL LTD | BG | In use | |
| TRACC | Traccion Rail s.l. | ES | In use | azvi.es |
| TRACE | ТРЕЙС ГРУП ХОЛД АД | BG | In use | tracebg.com |
| TRACK | ON-TRACK, s.r.o. | CZ | In use | ontrack-web.com |
| TRAIN | TRI Train Rental GmbH | DE | In use | train-rental.com |
| TRAK | Trakcia AD / Тракция АД | BG | In use | traction.com |
| TRAKC | TRAKCE A.S. Spółka Akcyjna Oddzial w Polsce | PL | In use | |
| TRAKO | TRAKOL sp. z o.o. | PL | In use | |
| TRAME | TRAMESA S.A | ES | In use | tramesa.com |
| TRAMO | TRAMO RAIL, a.s. | CZ | In use | |
| TRANS | TRANSPORTSERVIS, spol. s r.o. | CZ | In use | |
| TRAPI | Trans Rapid s.r.o. | CZ | In use | |
| TRAPL | TRAKCJA PRKiI S.A. | PL | In use | trakcjapolska.com |
| TRAPP | Trapp Tief- und Gleisbau GmbH | DE | In use | trapp-gleisbau.de |
| TRARI | Transagent d.o.o | HR | In use | transagent.biz |
| TRARR | Transagent Rail d.o.o | HR | In use | transagent.hr |
| TRAS | Trasfeimer Trasporti Ferroviari Innovativi Meridionali S.p.A. | IT | In use | |
| TRC | TIM RAIL CARGO | RO | In use | timrailcargo.ro |
| TRE | TOMI - REMONT a.s. | CZ | In use | |
| TREVI | Trevisan S.r.l. | IT | In use | |
| TRF | Transalp Renouvellement | FR | In use | transalp-renouvellement.fr |
| TRFSA | TRANSFESA (Transportes Ferroviarios Especiales S.A.) | ES | In use | transfesa.com |
| TRFSR | TRANSFESA RAIL S.A.U. | ES | In use | transfesa.com |
| TRG | TRIANGULA Logistik GmbH | DE | In use | triangula.de |
| TRGAZ | TRANSGAZ S.A. | AT | In use | transgaz.ch |
| TRGTI | TENSOL RAIL SA | CH | In use | tensolrail.com |
| TRI | Transins Industry | BG | In use | |
| TRIAI | INGENIERÍA Y TÉCNICA DEL TRANSPORTE, TRIA S.A. | ES | In use | |
| TRIM | TRIMAN Építőipari Kft. | HU | In use | triman.hu |
| TRK | Turkmenistan Railways | TM | In use | |
| TRKK | Przedsiębiorstwo Budownictwa Specjalistycznego TRANSKOL Sp. z o.o. | PL | In use | transkol.eu |
| TRKN | TURKON DEMIRYOLU TAŞIMACILIK ANONIM ŞIRKETI | TR | In use | turkonholding.com |
| TRKOW | Towarzystwo Rodzina Kolejarska | PL | In use | |
| TRL | Timberrail Logistics GmbH | DE | In use | erfurter-bahnservice.de |
| TRLG | Tpикс Лоджистик ЕООД | BG | In use | |
| TRN | TRN SA (Transports régionaux neuchâtelois) | CH | In use | trn.ch |
| TRNY | TRAK Rail, s.r.o. | CZ | In use | trak-rail.cz |
| TROL | TRANSPOL Sp. z o.o. | PL | In use | |
| TRON | TRONOS AG | CH | In use | |
| TROYA | TROYA CONSTRUCCIONES FERROVIARIAS, S.L. | ES | In use | troyacf.es |
| TRR | TRANS RAIL SRL | RO | In use | transrail.ro |
| TRS | TRINITES s.r.o. | SK | In use | |
| TRSI | Transdev Rail Sud lntermétropole (TRSI) | FR | In use | |
| TRSLT | TEKNİK RAYLI SISTEMLER PEYZAJ İNŞ. MÜH. SAN.VE TIC.LTD. ŞTİ | TR | In use | |
| TRSOD | CIECH Cargo Sp.z o.o. | PL | In use | |
| TRSPE | Trainspeed sp. z o.o. | PL | In use | trainspeed.eu |
| TRSVI | TRANSERVI | ES | In use | transfesa.com |
| TRTR | Tracona Trading | SE | In use | |
| TRTUR | TRANSTUR ULUSLARARASI NAKLİYAT VE TİCARET A.Ş | TR | In use | transtur.com.tr |
| TRV | Train Value GmbH | DE | In use | trainvalue.com |
| TRVEL | Trafikverket Elkraft | SE | In use | trafikverket.se |
| TRVF | Trafikverket | SE | In use | trafikverket.se |
| TRWBE | TRW | BE | Revoked | lineas.net |
| TRWFR | T.R.W | FR | In use | |
| TS | Tiefbau Sommerfeld GmbH | DE | In use | tiefbau-sommerfeld.de |
| TSB | Taunusbahn | DE | In use | |
| TSBAU | TS BAU GMBH | DE | In use | ts-bau.com |
| TSD | Transport-Schienen-Dienst GmbH | DE | Revoked | hochwaldbahn.de |
| TSE | Thomas Speich Eisenbahndienstleistungen | DE | In use | |
| TSERV | Arkadiusz Wójt Techservice | PL | In use | techservice.com.pl |
| TSM | TS Tiefbau und Service GmbH | DE | In use | mansfeldts.de |
| TSO | TSO | FR | In use | tso.fr |
| TSOCA | TSO CATENAIRES | FR | In use | tso-catenaires.fr |
| TSOL | TSOL, société du tramway du sud-ouest lausannois SA | CH | Revoked | |
| TSOSA | Tabor Szynowy” Opole Spółka Akcyjna | PL | In use | taborszynowy.com.pl |
| TSP | TERMOELECTRICA SA - SUCURSALA TERMOSERV PAROSENI | RO | In use | |
| TSR | TSR Recycling GMBH & CO. KG | DE | In use | |
| TSS | Traťová strojní společnost, a.s. | CZ | In use | |
| TSSC | TSS Cargo | CZ | In use | |
| TSSTT | TSS GRADE, a.s. | SK | In use | tss.sk |
| TSVAB | Trinseo Sverige AB | SE | In use | trinseo.com |
| TSVG | "TSV"Gorna Orjahovitza | BG | In use | tsv-bg.com |
| TSVP | "TSV" Plovdiv | BG | In use | tsv-bg.com |
| TSVS | "TSV" Sofia | BG | In use | tsv-bg.com |
| TSVV | "TSV" Varna | BG | In use | tsvvarna.com |
| TSYS | TRAKCJA SYSTEM sp. z o.o. | PL | In use | trakcjasystem.pl |
| TT | Trentino Trasporti S.p.A | IT | In use | trentinotransporti.it |
| TTBG | ТТ БЪЛГАРИЯ ЕООД | BG | In use | |
| TTC | The Train Company | NL | In use | ttconline.nl |
| TTCC | TRADE TRANS COMBI SRL | RO | In use | tradetrans.com |
| TTCNG | T.T. CARGO mednarodni prevozi d.o.o. | SI | In use | ttcargo.si |
| TTDA | TRAIN THUR DOLLER ALSACE | FR | In use | train-doller.org |
| TTDDO | Tereos TTD, a.s. | CZ | In use | cukrovaryttd.cz |
| TTE | Trentino Trasporti Esercizio S.p.A. | IT | In use | |
| TTG | Ferro-Tech Sàrl | LU | In use | tt-group.lu |
| TTGGE | Tyczka Gase GmbH | DE | In use | tyczka.de |
| TTKOL | Track Tec Koltram Sp. z o.o. | PL | In use | tracktec.eu |
| TTL | TTL Ltd | BG | In use | ttl-bg.com |
| TTLOG | Track Tec Logistics sp. z o.o. | PL | In use | tracktec.eu |
| TTR | TRADE TRANS RAILLOGISTICS SA | RO | In use | pambac.ro |
| TTRAI | Track Tec Rail sp. z o.o | PL | In use | tracktec.eu |
| TTS | TRANSPORT TRADE SERVICES SA | RO | In use | tts-group.ro |
| TTSA | TRACK TEC SPÓŁKA AKCYJNA | PL | In use | tracktec.eu |
| TTT | Three T AB | SE | Revoked | railcare.se |
| TTTRA | TT-TRANS, s.r.o. | SK | In use | tt-trans.sk |
| TTTRO | TRADE TRANS TERMINAL SRL | RO | In use | tradetrans.com |
| TTVL | Train touristique de la vallée du Loir (TTVL) | FR | In use | |
| TTX | SFP | IT | In use | |
| TUA | Società Unica Abruzzese di Trasporto TUA S.p.A. | IT | In use | tuabruzzo.it |
| TUAG | Marti Tunnel AG | CH | In use | marti-tunnel.ch |
| TUG | TUG Tief- und Gleisbau Brandenburg/H. GmbH | DE | In use | tug-brandenburg.de |
| TUL | Teplárna Ústí nad Labem, a.s. | CZ | In use | |
| TUPRS | TÜPRAŞ (Türkiye Petrol Rafinerileri A.Ş.) | TR | In use | tupras.com.tr |
| TUVCH | TÜV SÜD Schweiz AG | CH | In use | tuvsud.com/de-ch |
| TVA | Association de la 141R420 | FR | In use | trainvapeur-auvergne.com |
| TVAB | Tekniska Verken i Linköping AB | SE | Revoked | tekniskaverken.se |
| TVK | Tiszai Vegyi Kombinát Nyrt | HU | In use | tvk.hu |
| TVRG | TovarGo, s.r.o. | CZ | In use | |
| TVS | Thrall Vagonka Studénka, a.s. | CZ | In use | |
| TVTLM | TATRAVAGÓNKA Tlmače spol. s r.o. | SK | In use | |
| TVYS | TRAVYS - Transports Vallée-de-Joux - Yverdon-les-Bains - Sainte-Croix SA | CH | In use | travys.ch |
| TWA | TRANSWAGGON GmbH | DE | In use | transwaggon.de |
| TWACH | TRANSWAGGON AG | CH | In use | transwaggon.ch |
| TWASE | TRANSWAGGON AB | SE | In use | transwaggon.se |
| TWBS | Transwagon Burgas | BG | In use | |
| TWE | Teutoburger Wald-Eisenbahn Gesellschaft | DE | In use | twe-connex.de |
| TWFUF | Verein Historischer Triebwagen 5 | CH | In use | triebwagen5.ch |
| TWG | TANKWAGON Sp. z o.o | PL | In use | tankwagon.pl |
| TXL | TX Logistik AG | DE | In use | txlogistik.eu |
| TXLA | TX Logistik Austria GmbH | AT | In use | txlogistik.at |
| TXLCH | TX Logistic GmbH (Schweiz) | CH | In use | tx-logistik.de |
| TXLI | TX Logistik AG Filiale Italia | IT | In use | |
| TYGE | Tyczka GmbH & Co KGA | DE | In use | |
| TYS | Tyseley Locomotive Works Ltd | UK | In use | vintagetrains.co.uk |
| TZ | TŘINECKÉ ŽELEZÁRNY, a.s. | CZ | In use | |
| TZB | Traditionszug Berlin e.V. | DE | In use | berlin-macht-dampf.com |
| TZLN | Teplárna Zlín s.r.o. | CZ | In use | |
| TZVZG | TŽV Gredelj d.o.o. | HR | In use | tzv-gredelj.hr |
| UAC | ETS CLAUDE | FR | In use | ets-claude.com |
| UBB | Usedomer Bäderbahn GmbH | DE | In use | ubb-online.de |
| UCED | ECED Přerov s.r.o. | CZ | In use | |
| UCINA | TECHNOSTEEL LBR SRL | RO | In use | |
| UCLSK | UniCredit Leasing Slovakia, a.s. | SK | In use | unicreditleasing.sk |
| UCMR | UCM RESITA SA | RO | In use | ucmr.ro |
| UDIET | Gleis- und Signalbau Uwe Dietrich | DE | In use | |
| UEF | UEF Eisenbahnverkehrsgesellschaft | DE | In use | |
| UEG | Usedomer EisenbahnGbR | DE | In use | ueg-online.com |
| UEGM | UTE Energia Galicia Mantenimiento, S.A. | ES | In use | |
| UEH | Unterländer Eisenbahnfreunde Heilbronn e.V. | DE | In use | |
| UFA | UFA AG | CH | In use | ufa.ch |
| UFO | INVEHO UFO | FR | In use | inveho.eu |
| UFR | UNIFERTRANS S.A. | RO | In use | |
| UHL | G.Uhlmann GmbH | DE | In use | g.uhlmann.de |
| UJEVE | Ulrich Joh. Evers GmbH & Co. KG | DE | In use | |
| ULTBG | Ultra-Brag AG | CH | In use | ultra-brag.ch |
| UMABF | UTE MANTENIMIENTO AVE BURGO DE EBRO - FIGUERES | ES | In use | |
| UNEX | UNEX a.s. | CZ | In use | |
| UNI | UNIFERR Srl | IT | In use | clfspa.it |
| UNIBB | Universale Bau GmbH Zweigniederlassung Bahnbau | AT | In use | |
| UNICZ | UNILEASING a.s. | CZ | In use | unileasing.cz |
| UNIDO | UNIPETROL DOPRAVA, a.s. | CZ | In use | |
| UNPAL | UNIMOT Paliwa sp. z o.o. | PL | In use | unimotpaliwa.pl |
| UOT | UNICOM OIL TERMINAL SA | RO | In use | unicom-group.ro |
| UP | up-schienenfahrzeugtechnik, Inhaber Uwe B.Pfotenhauer | DE | In use | up-schienenfahrzeugtechnik.de |
| UPSOM | GHCL UPSOM ROMANIA S.A. | RO | In use | unicom-group.ro |
| UROMA | UROMAC SYSTEMS SA | ES | In use | uromac.com |
| URW | UNIKOL RAILWAY WORKSHOP S.C. BARBARA SKAWIŃSKA STANISŁAW SKAWIŃSKI | PL | In use | unikol-ko.com.pl |
| USG | US GOVORA CIECH CHEMICAL GROUP SA | RO | In use | usg.ro |
| USRS | US RS, s.r.o. | SK | In use | |
| USSK | U.S. Steel Košice | SK | In use | |
| UST | UNISPED Speditions- und Transportgesellschaft mbH | DE | In use | |
| UTEX | Przedsiębiorstwo Produkcyjno-Handlowe UTEX Sp. z o.o. | PL | In use | utex.com.pl |
| UTG | UTG Unabhängige Tanklogistik GmbH | DE | In use | |
| UTI | Uzbekistan Railways - Узбекистон темир йуллари (УТИ) | UZ | Blocked | uzrailway.uz |
| UTK | Unitranscom | BG | In use | |
| UTL | Umwelt+Transportlogistik AG | CH | In use | |
| UTLD | UTL Umwelt- und Transportlogistik GmbH | DE | In use | utl-gmbh.de |
| UTOGI | AZVI, S.A E INGENIERÍA Y TECNICA DEL TRANSPORTE TRIA, S.A. | ES | In use | |
| UTVLL | UTE MANTENIMIENTO AVE VILLADA | ES | In use | |
| UTVRB | UTE MANTENIMIENTO VILLARRUBIA | ES | In use | |
| UTZ | UNICOM TRANZIT SA | RO | In use | unicom-group.ro |
| UVAID | UZINA DE VAGOANE AIUD SA | RO | In use | emharghita.ro |
| UWAY | UNITED RAILWAYS SRL | RO | In use | |
| UZ | Ukraine Railways - UkrZaliznyza | UA | In use | uz.gov.ua |
| UZKA | UZKA CONSTRUCTION INDUSTRY AND TRADE INC. | TR | In use | uzka.com.tr |
| UZKRY | UZKARAY CONSTRUCTION INDUSTRY AND TRADE INC. | TR | In use | uzka.com.tr |
| UZRCV | COMPLEX ENERGETIC CRAIOVA SA - UZINA DE REPARATII CRAIOVA | RO | In use | |
| VA | Lokalbahn Vöcklamarkt - Attersee | AT | Revoked | stern-verkehr.at |
| VABWG | Voestalpine Track Solutions Germany GmbH | DE | In use | voestalpine.com/TrackSolutionsGermany |
| VADS | AWT ROSCO a.s. | CZ | Revoked | |
| VADSS | VADS, organizačná zložka | SK | In use | vads.cz |
| VAEBZ | VAE APCAROM SA | RO | In use | |
| VAFCO | VALSECCHI ARMAMENTO FERROVIARIO SRL | IT | In use | valsecchiarmamentoferroviario.com |
| VAFER | VAFER MAQUINARIA, S.L. | ES | In use | |
| VAGON | MÁV VAGON Kft. | HU | In use | mavvagon.hu |
| VAGZ | Vanoli AG Zofingen | CH | In use | vanoli.ch |
| VALTA | Valtasiirto Oy | FI | In use | valtasiirto.fi |
| VAM | Vest-Agder-museet IKS | NO | In use | |
| VARO | Varo Energy Tankstorage AG | CH | In use | varoenergy.com |
| VAROR | Varo Refining (Cressier) SA | CH | In use | varoenergy.com |
| VAS | Västergötlands Ånglokssällskap | SE | In use | |
| VASD | voestalpine Stahl Donawitz GmbH & Co KG | AT | In use | voestalpine.com |
| VASEP | Vasútépítők Kft | HU | In use | vasutepitok.hu |
| VAT | voestalpine Tubulars GmbH & Co KG | AT | In use | vatubulars.com |
| VATE | Väte Consulting AB | SE | In use | va-te.se |
| VATSG | Voestalpine Track Solutions Germany GmbH | DE | In use | voestalpine.com/TrackSolutionsGermany |
| VAVI | VÁPENKA VITOŠOV s.r.o. | CZ | In use | |
| VBE | Verkehrsbetriebe Extertal | DE | In use | vbe-extertal.de |
| VBFVG | VECCHI BINARI F.V.G. | IT | In use | vecchibinarifvg.it |
| VBG | Vogtlandbahn GmbH | DE | In use | vogtlandbahn.de |
| VBK | VBK_Verkehrsbetriebe Karlsruhe GmbH | DE | Revoked | vbk-online.de |
| VBN | Verkehrsbetriebe Nordhausen GmbH | DE | In use | verkehrsbetriebe-nordhausen.de |
| VBV | Verein Braunschweiger Verkehrsfreunde e.V. | DE | In use | vbv-bs.de |
| VBZ | Verkehrsbetriebe Zürich | CH | In use | vbz.ch |
| VC | Veolia Cargo S.A.S. | FR | In use | veoliacargo.com |
| VCD | Veolia Cargo Deutschland | DE | In use | |
| VCI | Veolia Cargo Italia | IT | In use | veolia-cargo.it |
| VCL | Veolia Cargo Link | FR | In use | veoliacargo.com |
| VCN | Veolia Cargo Nederland | NL | In use | veoliacargo.nl |
| VCS | Vápenka Čertovy schody, akciová společnost | CZ | In use | |
| VCSA | Via Cargo S.A. | PL | In use | viacargo.eu |
| VCT | Vectus | DE | In use | vectus-bahn.de |
| VCTK | Via Cargo Technika sp. z o.o. | PL | In use | |
| VD | VÍTKOVICE Doprava, a.s. | CZ | In use | |
| VDA | Východočeská dráha s.r.o. | CZ | In use | vychodoceskadraha.cz |
| VDBB | Verein Dampfbahn Bern | CH | In use | dbb.ch |
| VDC | Vaud Céréales SA | CH | In use | vaudcereales.ch/ |
| VDEA | Verband der Eisenbahn-Akademiker | AT | In use | vdea.at |
| VDM | Verein zur Erhaltung der Dampflok Muni | CH | In use | muni-dampflok.ch |
| VDOP | VÍTKOVICKÁ DOPRAVA a.s. | CZ | In use | vitkovickadoprava.com |
| VDSP | Viamont DSP a.s. | CZ | In use | |
| VDZ | Verein Damfgruppe Zürich | CH | In use | dampfgruppe-zuerich.ch |
| VE | VOSSLOH ESPAŇA, S.A | ES | Revoked | vossloh-espana.com |
| VEB | Vulkan-Eifel-Bahn Betriebsgesellschaft mbH | DE | In use | veb.de |
| VEBBV | VEB Tractie B.V. | NL | In use | veb-tractie.nl |
| VECCH | Vecchietti | FR | In use | colasrail.com |
| VEF | Verdener Eisenbahnfreunde-Kleinbahn Verden Walsrode E.V | DE | In use | kleinbahnbezirk.de |
| VEFO | Verband der Eisenbahnfreunde | AT | In use | eisenbahnmuseum.at |
| VEFS | VEFS | DE | In use | vefs-bocholt.de |
| VEHE | Verein Erhalt historische Ae 6/6 11421 | CH | In use | ae66.ch |
| VEIDE | Veidekke Entreprenør AS | NO | In use | veidekke.no |
| VEKO | Vulkaneifelbau GmbH Co.VG | DE | In use | |
| VELF | VELFER s.r.l. | IT | In use | |
| VELOG | VE-Log GmbH | DE | In use | ve-log.de |
| VEN | Transdev Verkehr GmbH | DE | In use | transdev.de |
| VENDA | Vendys & V s.r.o. | CZ | In use | |
| VEO | Transdev Sverige AB | SE | In use | transdev.se |
| VEOR | Verein 1020.042-6 | CH | In use | verein1020.ch |
| VESK | Vetter Busunternehmen GmbH | DE | In use | vetter-bus.de |
| VEV | Vorwohle-Emmerthaler Verkehrsbetriebe | DE | In use | -- |
| VFLI | Voies Ferrées Locales et Industrielles | FR | Revoked | groupevfli.com |
| VFS | VFS Trading s.r.o. | CZ | In use | |
| VGH | Verkehrsbetriebe Grafschaft Hoya | DE | In use | vgh-hoya.de |
| VGOMZ | Valentin Gas u. Oel GmbH & Co. | DE | In use | |
| VHE | Verein Historische Eisenbahn Emmental | CH | In use | historische-eisenbahn-emmental.ch |
| VHEB | Verein „Historische Elektrolokomotiven Bludenz" | AT | In use | nostalgielok.com |
| VHID | V-HÍD Vagyonkezelő Kft. | HU | In use | vhid.hu |
| VHSG | Vossloh High Speed Grinding GmbH | DE | Revoked | vossloh.com |
| VIA | VIAMONT Servis a.s. | CZ | In use | viamont.cz |
| VIAC | Viamont Cargo a. s. | CZ | In use | viamontcargo.cz |
| VIALT | VIALTE s.r.o. | SK | In use | |
| VIARE | VIA-REK, spol. s r.o. | CZ | In use | via-rek.cz |
| VIAS | VIAS GmbH | DE | In use | vias-online.de |
| VIASR | VIAS Rail GmbH | DE | In use | |
| VIB | vib GmbH | CH | In use | vib-gmbh.ch |
| VIBEU | vib europe GmbH | DE | In use | vib-europe.de |
| VICAT | VICAT | FR | In use | ciment-vicat.fr |
| VICEM | Ciments Vigier SA | CH | In use | vicem.ch |
| VICU | Transportes Vicuña | FR | In use | transportesvicuna.com |
| VIDA | Vida Wood AB | SE | In use | vida.se |
| VIIA | VIIA | FR | In use | viia.com |
| VIK | VIKING-Rail ApS | DK | In use | vikingrail.dk |
| VILOR | CONTRATAS VILOR SL | ES | In use | vilor.net |
| VIMAC | VIMAC, S.A. | ES | In use | vimac.es |
| VIMAT | Imathia Consulting & Engineering, S.A. | ES | In use | imathia.es |
| VIRGI | VIRGINIA SRL | RO | In use | |
| VIRK | David Kolář, Jiři Hladik | CZ | In use | |
| VIS | VIS Verkehrs Industrie Systeme GmbH | DE | In use | vis-hbs.de |
| VITAL | VITAL & HEYL SRL | RO | In use | |
| VK | Völker Bauunternehmen GmbH | DE | In use | |
| VKL | v.Kintzel & Lauser GmbH | DE | In use | |
| VKSWU | V. K. S. VAGON KOMERC SPEED, spol. s r.o. | CZ | In use | |
| VKZ | Občianske združenie Veterán klub železníc Poprad | SK | In use | tatranskakometa.sk |
| VL | Vossloh Rolling Stock GmbH | DE | In use | vl-rs.com |
| VLB | Vestsjællands Lokalbaner A/S | DK | In use | ohj.dk, vlb.dk |
| VLF | Valditerra Lavori Ferroviari S.p.A. | IT | In use | valditerra.com |
| VLO | Verkehrsgesellschaft Landkreis Osnabrück | DE | In use | vlo.de |
| VLR | Valenta Rail s.r.o. | CZ | In use | valenta-rail.cz |
| VMET | VIROMET S.A. | RO | In use | viromet.ro |
| VMG | Vanomag AG | CH | In use | vanomag.ch |
| VMIK | Verein Mikado 1244 | CH | In use | mikado1244.ch |
| VMIN | Ventura Mineraria S.r.l. | IT | In use | fventura.it |
| VMR | Viamontregio a.s. | CZ | In use | viamontregio.cz |
| VMRS | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com |
| VNSS | Vossloh Nordic Switch Systems AB | SE | In use | vosslohnordic.com |
| VNTIT | Veneta21 SRL | IT | In use | veneta21.it |
| VNW | Vonwillerka s.r.o. | CZ | In use | ventilovka.cz |
| VODST | "Водстрой 98" АД | BG | In use | partner-leasing.com |
| VPAC | Verein Pacific 01 202 | CH | In use | dampflok.ch |
| VPM | Verein Pendelzug-Mirage (VPM) | CH | In use | pendelzug-mirage.ch |
| VPS | Verkehrsbetriebe Peine-Salzgitter GmbH | DE | In use | vps-bahn.de |
| VPSK | VPS Development s.r.o | SK | In use | |
| VR | VR-Yhtymä Oy | FI | In use | vr.fi |
| VRAIL | VentuRail nv | BE | In use | venturail.be |
| VRCK | voestalpine Track Solutions Königsborn GmbH | DE | In use | voestalpine.com/track-solutions-koenigsborn |
| VRM | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com |
| VRPUK | VolkerRail | UK | In use | volkerrail.co.uk |
| VRR | Volker Rail | NL | In use | volkerrail.nl |
| VRSD | Vossloh Rail Services Deutschland GmbH | DE | In use | vossloh.com/de/ |
| VRSF | Vossloh Rail Services Finland Oy | FI | In use | vossloh.com |
| VRT | VR Track Oy | FI | Revoked | nrcgroup.fi |
| VRTAB | Nordic Railway Construction Underhåll AB | SE | In use | nrcgroup.se |
| VS | VITROSILICON SA | PL | In use | vitrosilicon.com.pl |
| VSE | Verein Sächsischer Eisenbahnfreunde e.V | DE | In use | |
| VSM | Veluwsche Stoomtrein Maatschappij | NL | In use | stoomtrein.org |
| VSOE | Venice Simplon-Orient-Express Ltd (VSOE) | UK | In use | belmond.com |
| VSRT | Volker Stevin Rail & Traffic Materieel | NL | In use | vsrt.com |
| VSS | Verein Schiene Südburgenland | AT | In use | frowos.com |
| VSTAS | Vanormelingen-Stas NV | BE | In use | vanormelingen-stas.be |
| VSVT | Vestjællands Veterantog | DK | In use | vsvt.dk |
| VSZ | VSZ Ocel Kosice (US Steel) | SK | Revoked | |
| VT | Virgin Trains | UK | In use | virgintrains.co.uk |
| VTA | Västtrafik AB | SE | In use | vasttrafik.se |
| VTAB | Värmlandstrafik AB | SE | In use | varmlandstrafik.se |
| VTAG | Värmlandståg | SE | In use | varmlandstag.se |
| VTG | VTG Rail Europe GmbH | DE | In use | vtg.de |
| VTGA | VTG Austria Ges.m.b.H | AT | In use | vtg.de |
| VTGB | VTG Benelux | NL | In use | vtg.de |
| VTGCH | VTG Schweiz GmbH | CH | In use | vtg.com |
| VTGCZ | RETRACK CZECH s.r.o. | CZ | In use | |
| VTGD | VTG GmbH | DE | In use | vtg.de |
| VTGE | VTG Rail España, S.L. | ES | Revoked | vtg.com |
| VTGF | VTG France SAS | FR | In use | vtg.com |
| VTGI | VTG Italia S.r.l. | IT | Revoked | vtg.com |
| VTGRT | Retrack GmbH & Co. KG | DE | In use | vgt.com |
| VTGSK | Retrack Slovakia s. r. o. | SK | In use | carborail.sk |
| VTGUK | VTG Rail UK Ltd | UK | In use | vtg.com |
| VTL | VILLANOVA TRANSPORTI & LOGISTICA | IT | In use | bcube.com |
| VTLBG | „ВАГОН ТРАНС ЛОГИСТИК” ООД | BG | In use | |
| VTLT | J.M. Voith SE & Co. KG | DE | In use | |
| VTN | Veolia Transport Nederland | NL | In use | veoliatransport.nl |
| VTON | Veterantåg Övre Norrland | SE | In use | nbjvm.se |
| VTOR | VTor sp. z o.o. | PL | In use | |
| VTS | VIA TERRA SPEDITION SRL | RO | In use | viaterraspedition.ro |
| VTSD | voestalpine Track Solutions Duisburg GmbH | DE | In use | voestalpine.com/track-solutions-duisburg |
| VTT | VIA TERRA TRANS SRL | RO | In use | |
| VTV | Veterantog Vest | DK | In use | veterantog-vest.dk |
| VUKV | VÚKV a.s. | CZ | In use | |
| VUZ | Výzkumný Ústav Železniční, a.s. | CZ | In use | |
| VV | Pavel Vebr | CZ | In use | |
| VVILL | Vasútvillamositó Kft. | HU | In use | vasutvill.hu |
| VVM | VVM-Museumsbahn-Betriebsgesellschaft m.b.H | DE | In use | |
| VVRO | Veolia Verkehr Regio Ost GmbH | DE | Revoked | mitteldeutsche-regiobahn.de |
| VVT | Vapeur Val-de-Travers (VVT) | CH | In use | vvt.ch |
| VVUR | Vojenský vlečkový úřad Praha | CZ | Revoked | |
| VW | Volkswagen AG | DE | In use | |
| VWE | Verden-Walsroder Eisenbahn GmbH | DE | In use | vwebahn.de |
| VY | Vygruppen AS | NO | In use | vy.no |
| VYCSA | VIAS Y CONSTRUCCIONES, S.A. | ES | In use | vias.es |
| VZ | Výtopna Zdice z.s. | CZ | In use | saxi.cz |
| VZSP | ˮКоловагˮ АД | BG | Revoked | kolowag.bg |
| WAB | Westfälische Almetalbahn | DE | In use | wab-altenbeken.de |
| WABA | Waldbahn Almetal e.V. | DE | In use | waldbahnalmetal.de |
| WABCH | Wengernalpbahn AG | CH | In use | jungfrau.ch |
| WAG | Westfalen Aktiengesellschaft | DE | In use | |
| WAGN | West Anglia Great Northern Railway | UK | Blocked | wagn.co.uk |
| WAGON | WAGON-RENT Mirosław Maszoński | PL | In use | |
| WALO | WALO International AG | CH | In use | walo.ch |
| WAM | WAM sp. z o.o. | PL | In use | |
| WASCO | WASCOSA AG, Luzern | CH | In use | |
| WB | Wales& Borders Trains | UK | Blocked | walesandborderstrains.co.uk |
| WBA | Wadle Bauuternehmung GmbH, Altheim | DE | In use | wadle.de |
| WBG | WeserBahn GmbH | DE | In use | weserbahn.de |
| WBGD | Waggonbau Graaff GmbH | DE | In use | waggonbau-graaff.de |
| WBIO | Wratislavia – Bio Sp. z o.o. | PL | In use | wratislavia-bio.pl |
| WBIOD | WRATISLAVIA-BIODIESEL S.A. | PL | In use | |
| WBN | ELH Waggonbau Niesky GmbH | DE | In use | waggonbau-niesky.com |
| WCB | Wagon Care B.V. | NL | In use | wagoncare.nl |
| WCR | West Coast Railway Company Limited | UK | In use | westcoastrailways.co.uk |
| WCS | Wagon Center Süd GmbH | AT | In use | neek.at |
| WE | Werra-Eisenbahnverkersgesellschaft mbH | DE | In use | |
| WEBA | Westerwaldbahn | DE | In use | westerwaldbahn.de |
| WEE | Weser Ems Eisenbahn GmbH (WEE) | DE | In use | wee.gmbh |
| WEEX | Weser Ems Express GmbH | DE | In use | weseremsexpress.de |
| WEF | Warener Eisenbahnfreunde e.V. | DE | In use | warener-eisenbahnfreunde.de |
| WEG | Württembergische Eisenbahn-Gesellschaft mbH | DE | In use | web-bahn.de |
| WEIDL | Erdbau & Abbruch Weidlich | DE | In use | |
| WELTE | Michael Welte Baumaschinen Gmbh | DE | In use | welte-baumaschinen.de |
| WEMEG | Westmecklenburgische Eisenbahngesellschaft mbH | DE | In use | wemeg.de |
| WEMO | WEMO-tec GmbH | DE | In use | wemo-tec.com |
| WEN | Hans Wendel GmbH & Co. KG | DE | In use | |
| WENA | Eisenbahnverkehrsunternehmne | AT | In use | walsereisenbahn.at |
| WEST | Westermann GmbH & Co. KG | DE | In use | |
| WESTB | Westbahn GmbH | DE | In use | westbahn.com |
| WESTL | Westfälische Localbahn e.V | DE | In use | westloc.de |
| WFB | WestfalenBahn GmbH | DE | In use | westfalenbahn.de |
| WFJ | Museiföreningen Wadstena-Fogelsta Järnväg | SE | In use | wfj.se |
| WFL | WFL Wedler Franz Logistik GmbH & Co. KG | DE | In use | wfl-lok.de |
| WG | Walter Gasthaus Gleis- und Tiefbau GmbH & Co. KG | DE | In use | gasthaus-gleisbau.de |
| WGT | A.P.E.L. Gleisbautechnik GmbH & Co. KG | DE | In use | apel-gleisbautechnik.de |
| WHE | Wanne-Herner Eisenbahn und Hafen GmbH | DE | In use | whe.de |
| WHF | Wald-Holz-Forst Gbr | DE | Revoked | |
| WHV | Witt Handelsvertertung GmbH | DE | In use | |
| WIBAU | L10 Liegenschaftsverwaltungs Gmbh | AT | In use | bauwinkler.at |
| WICO | William Cook Rail GmbH | CH | In use | william-cook.co.uk |
| WIJS | Stichting WIJS | NL | In use | wijsonline.nl |
| WIM | LML Industriemuseum | DE | In use | industriemuseum.de |
| WIN | Windhoff Bahn- und Anlagentechnik GmbH | DE | In use | windhoff.de |
| WINCO | Winco Oy | FI | Revoked | winco.fi |
| WINR | Wincanton Rail GmbH | DE | Revoked | wincanton.eu |
| WIRO | WIEBE ROMANIA SRL | RO | In use | wiebe.ro |
| WIS | Wismut GmbH | DE | In use | wismut.de |
| WISA | Wagons Industriels SA | CH | In use | |
| WISKO | WISKOL 1 sp. z o.o. | PL | In use | wiskol.pl |
| WITTF | Eiffage Infra-Nordwest GmbH | DE | In use | eiffage-infra.de/nordwest |
| WJ | Weber-Berger Gleis-, Weichen- und Tiefbau GmbH | DE | In use | wb-gleisbau.de |
| WJSLK | Gleiskraft GmbH | DE | In use | gleiskraft.de |
| WKAG | Weiacher Kies AG | CH | In use | weiacherkies.ch |
| WKD | Warszawska Kolej Dojazdowa sp. z o.o. | PL | In use | wkd.com.pl |
| WKHA | Wilhelm Kemming GmbH | DE | In use | kemming.de |
| WKN | WESTMONTAGE Kabel und Netzwerk GmbH | DE | In use | |
| WL | WIENER LINIEN GmbH & Co KG | AT | In use | wienerlinien.at |
| WLB | Wiener Lokalbahnen AG | AT | In use | wlb.at |
| WLC | Wiener Lokalbahnen Cargo GmbH | AT | In use | wlb.at |
| WLE | Westfälische Landes-Eisenbahn GmbH | DE | In use | wle-online.de |
| WLH | Westfälische-Lokomotiv-Fabrik Reuschling GmbH&co. KG | DE | In use | reuschling.de |
| WLS | Waggon und Lokreperatur Service GmbH | DE | In use | wls-moers.de |
| WM | Wagonmarket, spol. s.r.o. | SK | In use | irsgroup.eu |
| WMAS | Wohnmobil auf Schienen | CH | In use | |
| WMN | Wagon Management SRL | RO | In use | wagon.ro |
| WMSZ | Schneider & Schneider GmbH | DE | In use | |
| WNXFR | WYNX Freight s.r.o. | CZ | In use | wynxpool.cz |
| WOT | WEEDFREE ON TRACK | BE | In use | weedfree.net |
| WPSMU | Wytwórnia Podkładów Strunobetonowych S.A. | PL | In use | wps-sa.com.pl |
| WRC | Vit Bukač | CZ | In use | |
| WRS | Westdeutsche Rail Service GmbH | DE | In use | |
| WRSCH | WRS Widmer Rail Services AG | CH | In use | w-r-s.ch |
| WRSSK | Wagon Rail Service, s.r.o. | SK | In use | |
| WS | Sebastian Wetzel | DE | In use | |
| WSB | Wynental- und Suhrentalbahn (WSB) | CH | Revoked | wsb-bba.ch |
| WSBA | WAGON SERVICE s. r. o. | SK | In use | wagonservice.sk |
| WSET | Westsächsische Eißenbahntransport Gesellschaft mbH | DE | In use | |
| WSG | waggonservice WSG mbH | DE | In use | waggonservice.com |
| WSMR | The Wrexham, Shropshire & Marylebone Railway Company Ltd. | UK | In use | wrexhamandshropshire.co.uk |
| WSSK | Rail Cargo Carrier – Slovakia s.r.o. | SK | In use | wagonservice.sk |
| WSTBA | Westbahn Management GmbH | AT | In use | westbahn.at |
| WSTN | Wagonservice spol. sr.o. | SK | In use | |
| WTB | Dampflok-Gemeinschaft 41096 e.V | DE | In use | |
| WTBB | Bahnbetriebe Blumberg GmbH & Co. KG | DE | In use | bahnbetriebe-blumberg.de |
| WTT | WTT, s.r.o. | CZ | In use | woodtt.eu |
| WVDO | Waggonvermietung Delta Oil GmbH | AT | In use | |
| WVZ | waggon24 GmbH | DE | Revoked | waggon24.com |
| WW | Willke rail construction GmbH & Co. KG | DE | In use | willke-gmbh.de |
| WWAG | Wieland-Werke AG | DE | In use | wieland.de |
| WWG | Weichenwerk Wörth GmbH | AT | In use | wwg.co.at |
| WWL | Willke Logistics GmbH | DE | In use | willke.com |
| WX | Wessex Trains | UK | Blocked | wessextrains.co.uk |
| WYNX | WYNX Pool s.r.o. | CZ | In use | wynxpool.cz |
| WZK | Warszawka Kolej Dojazdowa | PL | Blocked | |
| WZKV | Wałbrzyskie Zakłady Koksownicze “Victoria” S.A. | PL | In use | wzkvictoria.pl |
| XC | Cross Country Trains Ltd | UK | In use | crosscountrytrains.co.uk |
| XP | Xaver Pittrich GmbH & Co. KG | DE | In use | |
| XPS | Lineas SA/NV | BE | In use | lineas.net |
| XR | SPITZKE RIEBEL GmbH & Co. KG | DE | Revoked | spitzke.de |
| XRAIL | Crossrail Benelux nv | BE | In use | crossrail.be |
| XRI | Crossrail Italia S.r.l | IT | Revoked | crossrail.ch |
| XTR | XTR-SYSTEM DEVELOPMENT s.r.o | CZ | In use | |
| YARA | Yara Rostock Zweigniederlassung der Yara GmbH & Co. KG | DE | In use | yara.com |
| YARAF | Yara Suomi Oy | FI | In use | yara.fi |
| YLDRM | YILDIRIMLAR LOJISTIK A.Ş. | TR | In use | yildirimlarlojistik.com |
| YLTDM | Yiltas Demiryolu Tasimacilik Lojistik Ticaret Sanayi Anonim Sirketi | TR | In use | yiltasgrup.net |
| YOSAR | Yosaria Trains, a.s. | SK | In use | |
| YPRY | Yapiray Demiryolu IngŞaat Sistemleri San. Ve. Tic. A.Ş. | TR | In use | ym.com.tr |
| ZACH | Zakłady Azotowe Chorzów S.A. | PL | In use | azoty-adipol.pl |
| ZAF | Zuckerfabriken Aarberg und Frauenfeld AG | CH | In use | zucker.ch |
| ZAGRO | ZAGRO Bahn- und Baumaschinen GmbH | DE | In use | zagro-group.com |
| ZAPUL | Zakłady Azotowe PUŁAWY S.A. | PL | In use | zapulawy.pl |
| ZAS | Zweckverband Abfallverwertung Südostbayern (ZAS) | DE | In use | zas-burgkirchen.de |
| ZAWCO | Zweckverband Abfallwirtschaft Nordwest Oberfranken | DE | In use | zaw-coburg.de |
| ZB | Zillertaler Verkehrsbetriebe AG | AT | In use | zillertalbahn.at |
| ZBAU | Zürcher Bau GmbH | DE | In use | zuercher.de |
| ZBB | ZABABA s.r.o. | CZ | In use | masinka.cz |
| ZBCH | zb Zentralbahn AG | CH | In use | zentralbahn.ch |
| ZBCHS | ZÁVOD BIOCHEMICKÝCH SLUŽEB, s.r.o. | CZ | In use | |
| ZBKR | Zakład Budownictwa Kolejowego Radom Paweł Czupryn | PL | In use | zbkradom.pl |
| ZBM | Zeppelin Baumaschinen GmbH | DE | In use | zeppelin.de |
| ZC | Railway of the Democratic Peoples Republic of Korea (ЗЧ) | KP | In use | |
| ZCG | Željeznice Crne Gore | ME | In use | |
| ZCHLU | LUVENA S.A. | PL | In use | |
| ZCHR | ZAKŁADY CHEMICZNE “RUDNIKI” S.A. | PL | In use | zchrudniki.com.pl |
| ZCHSA | Zakłady Chemiczne „Organika-Sarzyna” S.A. | PL | In use | zch.sarzyna.pl |
| ZCHSI | Zakłady Chemiczne “Siarkopol” Tarnobrzeg Sp. z o.o. | PL | In use | zchsiarkopol.pl |
| ZCHZ | Zakłady Chemiczne ZACHEM S.A. | PL | In use | zachem.com.pl |
| ZEC | Zespół Elektrociepłowni Bydgoszcz S.A. | PL | In use | zecbyd.com.pl |
| ZECK | ZECK GmbH | DE | In use | zeck-gmbh.com |
| ZELPO | Železiarne Podbrezová a.s. | SK | In use | zelpo.sk |
| ZELPR | Železničná preprava, a.s. | SK | In use | |
| ZELSD | Hesteel Serbia Iron & Steel d.o.o. Beograd | RS | Revoked | zelsd.rs |
| ZEM | ZEM Łabędy sp. z o.o. | PL | In use | zemlab.com.pl |
| ZEPHI | ZEPHIR S.p.A. | IT | In use | zephir.eu |
| ZFA | SUIKER UNIE GMBH Zuckerfabrik Anklam | DE | In use | |
| ZFBH | Željeznice Federacije Bosne i Hercegovine | BA | In use | zfbh.ba |
| ZGHB | Zakłady Górniczo-Hutnicze “Bolesław” S.A. | PL | In use | zgh.com.pl |
| ZGOP | Privredno društvo za građenje, remont i održavanje pruga "ZGOP" a.d. Novi Sad | RS | In use | zgop.rs |
| ZGP | SŽ - ŽELEZNIŠKO GRADBENO PODJETJE LJUBLJANA d.d. | SI | In use | sz-zgp.si |
| ZHL | Zahnradbahn Honau - Lichtenstein e.V. | DE | In use | zhl.de |
| ZHPS | „ЖП Строѝ” АД | BG | In use | |
| ZHROR | ZAHARUL ORADEA SA | RO | In use | vesttransrail.ro |
| ZICG | ŽELJEZNIČKA INFRASTRUKTURA CRNE GORE | ME | In use | zicg.me |
| ZIGSX | ZIGSXPRESS GmbH | DE | In use | zigsxpress.com |
| ZIK | ZAKŁAD INŻYNIERII KOLEJOWEJ | PL | In use | ziksandomierz.pl |
| ZKT | Železničný klub Tatran, občianske združenie | SK | In use | |
| ZLOKO | ZOS LOKO | SK | In use | zosloko.sk |
| ZLSM | Zuidlimburgse Stoomtrein Maatschappij | NL | In use | zlsm.nl |
| ZMB | Zürcher Museums-Bahn | CH | In use | museumsbahn.ch |
| ZMCHK | Zakłady Metalowo-Chemiczne METCHEM Andrzej Świerczek | PL | In use | met-chem.pl |
| ZMS | Zweckverband Müllverwertung Schwandorf | DE | Revoked | z-m-s.de |
| ZMTUB | ZIMTUB SA | RO | In use | zimtub.ro |
| ZMZ | Zubrnická museální železnice | CZ | In use | zmz.cz |
| ZNLEP | Newag Gliwice S.A. | PL | In use | newaggliwice.pl |
| ZNPS | Zakład Naprawy Pojazdów Szynowych sp. z o.o | PL | In use | znps.com.pl |
| ZNTKG | Zakłady Naprawcze Taboru Kolejowego i Miejskiego sp. z o.o. | PL | In use | zntkim.pl |
| ZOE | Zeppelin Österreich GmbH | AT | In use | zeppelin-cat.at |
| ZOS | ZOS ZVOLEN s.r.o. | SK | In use | zosvolen.sk |
| ZOSHD | ZOS HOLDING s.r.o. | SK | In use | zoszvolen.sk |
| ZOSTT | ŽOS Trnava, a.s. | SK | In use | zos.sk |
| ZOSVR | ŽOS Vrútky a.s. | SK | In use | zos-vrutky.sk |
| ZOSZV | Železničné opravovne a strojárne Zvolen, a.s. | SK | In use | zoszv.eu |
| ZP | Želewnice Pešťál s.r.o. | CZ | In use | zeleznicepestal.cz |
| ZPAG | Ziegler Papier AG | CH | In use | zieglerpapier.com |
| ZPK | Zakłady Produkcji Kruszyw Rupińscy spółka | PL | In use | zpkszumowo.pl |
| ZPNT | TABOR RAIL Sp. Z o.o. | PL | In use | |
| ZPORT | ZÁHONY-PORT Zrt. (ZÁHONY-PORT Co) | HU | In use | zahony-port.hu |
| ZPS | JSW Logistics sp. z o.o. (dawniej Zakład Przewozów i Spedycji Spedkoks sp. z o.o | PL | In use | jsw-logistics.pl |
| ZPSSP | ZPS Sp. z o.o. | PL | In use | mtrzps.com.pl |
| ZPSV | Železniční průmyslová stavební výroba Uherský Ostroh a.s. | CZ | In use | |
| ZPSVC | Žpsv, A.S. Čaňa | SK | In use | |
| ZPSZ | Zväz pre skladovanie zásob, a.s. | SK | In use | |
| ZRD | Zeppelin Rental GmbH | DE | In use | zeppelin.com |
| ZRKPN | Zakład Robót Komunikacyjnych – DOM w Poznaniu Sp. z o.o. | PL | In use | zrk-dom.pl |
| ZRS | Željeznice Republike Srpske | BA | In use | zrs-rs.com |
| ZS | Železnice Srbije | RS | In use | zeleznicesrbije.com |
| ZSB | OHLA ŽS, a.s. | CZ | In use | ohla-zs.cz |
| ZSBA | OHL ŽS Slovakia, a.s. | SK | In use | zs-ba-as.sk |
| ZSKE | Železnicé stavby, a.s. Košice | SK | In use | zeleznicnestavby.sk |
| ZSNP | ZSNP, a.s. | SK | In use | zsnp.sk |
| ZSNPD | ZSNP DA, s.r.o. | SK | In use | zsnpd.sk |
| ZSR | Železnice Slovenskej Republiky | SK | In use | zsr.sk |
| ZSSK | Železničná Spoločnost' Slovensko, a.s. | SK | In use | zssk.sk |
| ZSSKC | Železničná Spoločnost' Cargo Slovakia a.s. | SK | In use | zscargo.sk |
| ZST | Železniční společnost Tanvald o.p.s. | CZ | In use | zubacka.cz |
| ZSTAV | Peter Hozák Želstav | SK | In use | |
| ZSTAW | Zdrowe Stawy Sp. Z o.o. | PL | In use | zdrowestawy.net |
| ZT | ZAGREBTRANS d.o.o. | HR | In use | zagrebtrans.hr |
| ZTB | Zakłady Tłuszczowe w Bodaczowie Sp. z o.o. | PL | In use | ztb.pl |
| ZTBIE | Zakłady Tłuszczowe “BIELMAR” Sp. z o.o. | PL | In use | bielmar.com.pl |
| ZTK | ZAKŁAD TRANSPORTU KOLEJOWEGO „SIARKOPOL” Sp. z o.o. | PL | In use | ztksiarkopol.pl |
| ZTKRU | Zakłady Tłuszczowe “Kruszwica” S.A. | PL | In use | ztkruszwica.pl |
| ZTS | Zellertal Schiene GbR | DE | In use | zellertal-Schiene.de |
| ZTT | Transporttechnik Zeller KG | AT | In use | |
| ZUB | ZUBAČKA,z.s. | CZ | In use | zubacka.cz |
| ZUESA | ZUE S.A. | PL | In use | grupazue.pl |
| ZUG | smart rail GmbH | DE | In use | smart-rail.eu |
| ZUGA | Zug Agency, s.r.o. | CZ | In use | zugagency.cz |
| ZUT | ZUT Wągrowiec Józef Kosiński | PL | In use | zutwagrowiec.com.pl |
| ZVA | Zweckverband Abfallwirtschaft Er-ERH | DE | In use | |
| ZVD | Zweckverband Donau-Hafen Deggendorf | DE | Revoked | hafen-deggendorf.de |
| ZWI | ZWEIWEG International GmbH & Co. KG | DE | In use | zweiweg.de |
| ZWIEH | G. Zwiehoff GmbH | DE | In use | zwiehoff.com |
| ZXBCZ | ZX-BENET CZ s.r.o | CZ | In use | |
| ZXBSK | ZX-BENET, s.r.o | SK | In use | |
| ZZ | Zehnder AG, Zürich | CH | In use | zehnderzuerich.ch |
| ZZNPO | ZZN Polabí, a.s. | CZ | In use | zznpolabi.cz |
| ZZZ | 3ZH | FR | In use | |