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| AAAX | Ann Arbor temir yo'li (1895-1976) → Ann Arbor Railroad (1988) |
| AACX | Alaska qishloq xo'jaligi bo'limi) |
| AADX | Airco qotishmalari va karbid |
| AAEX | Amerika Anilin va ekstrakt kompaniyasi |
| AAIX | ACS International Inc |
| AAKX | Amulko asfalt kompaniyasi |
| AALX | Murakkab aromatik moddalar |
| AAMX | ACF Industries yuk tashuvchilarning avtomobil liniyasi bo'limi; Arrendadora de Carros de Ferrocarril del Atlantico; Arrendadora de Carros de Ferrocarril |
| AARX | Amerika temir yo'llari uyushmasi |
| AATX | Ampacet korporatsiyasi |
| AAX | Amerika qishloq xo'jaligi kimyoviy kompaniyasi; Agrico Chemical Company |
| ABBX | Abbott laboratoriyalari |
| ABCX | Amerika Bitumuls kompaniyasi; Merchants Despatch Transport korporatsiyasi; Falcon ko'mir kompaniyasi; Tennessi vodiysi boshqarmasi |
| ABEX | Abbey Chemical Corporation; CPS Processing Corporation; CPS kimyoviy kompaniyasi; Abbey Chemical Corporation; Ilg'or BioEnergy |
| ABGX | Amerikaning qora granit kompaniyasi |
| ABIX | Anheuser-Busch |
| ABLX | Amerika muzlatgich tranzit kompaniyasi |
| ABMX | Albers Brothers Frezeleme kompaniyasi |
| ABOX | American Rail Box Car Company; Railbox kompaniyasi; TTX kompaniyasi |
| ABPX | Ashland yon mahsulot koks kompaniyasi; Hayvonlarning yon mahsulot korporatsiyasi |
| ABRX | Merchants Despatch Transport korporatsiyasi; AB Rail Investments, Inc.; Railmark Holdings, Inc. |
| ABSX | Amerika lavlagi shakar kompaniyasi; American Crystal Shakar kompaniyasi; Albert Brothers Inc |
| ABTX | Obri Bartlett; Shimoliy Amerika avtomobil korporatsiyasi; General Electric Railcar Services Corp. |
| ABWX | Asea Brown Boveri, Inc. |
| ABX | Adirondack Bottled Gas Corporation; Buyuk Barringtonning uy gaz korporatsiyasi |
| ACAX | Amerikaning alyuminiy kompaniyasi; Alliance Chemical Canada; Allied Chemical Corporation; Honeywell International |
| ACBX | Skandinaviya neft kompaniyasi; Amerika quyma temir quvur kompaniyasi |
| ACCX | Ansul Chemical Company; Konsolidatsiya ko'mir kompaniyasi |
| ACDX | Allied Chemical Corporation; Birinchi ittifoq xususiyatlari; Allied Chemical Corporation; Ittifoqdosh signal; Honeywell International |
| ACEX | Atlantika Siti elektr energiyasi kompaniyasi; Atlantika sement kompaniyasi; Moviy doira Atlantika; Ace Cogeneration kompaniyasi |
| ACFX | Amerika avtomobil va quyish korxonasi; ACF Industries yuk tashuvchilarning avtomobil liniyasi bo'limi; ACF Industries; General Electric Railcar Services Corp.; General Electric Rail Services korporatsiyasi |
| ACGX | Acme Gas Corporation; Suburban Propane, LP |
| ACIX | Arkansas Chemicals, Inc.; Great Lakes Chemical Corporation |
| ACJU | American Coastal Lines qo'shma korxonasi, Inc. |
| ACLU | Atlantic Container Line, Ltd. |
| ACLX | American Car Line kompaniyasi |
| ACMX | Allis-Chalmers Korporatsiya; Voith Hydro |
| ACNU | AKZO Chemie, B V |
| ACOU | Associated Octel Company, Ltd. |
| ACOX | Avrora kooperativ lift kompaniyasi (don etkazib beruvchilar) |
| ACPX | Amoco Canada Petroleum Company, Ltd.; Amoco Oil kompaniyasi; Union tank avtomobil liniyalari |
| ACPZ | Amerika beton mahsulotlari kompaniyasi |
| ACRX | American Chrome and Chemicals, Inc.; Elementis Chromium, LP |
| ACSU | Atlantic Cargo Services, AB |
| ACSX | First Union Properties, Inc.; Honeywell International |
| ACSZ | Amerika tashuvchisi uskunalari |
| ACTU | Associated Container Transport (Avstraliya), Ltd. |
| ACTX | Allied Chemical Corporation; Honeywell International |
| ACUU | Acugreen Limited |
| ACWZ | Tinch okeani temir yo'llari |
| ACXU | Atlantic Cargo Services, AB |
| ACXX | Anderson Columbia Company, Inc. |
| ACZX | A C temir yo'l xizmati kompaniyasi, Norfolk janubiy temir yo'l kompaniyasi |
| ADCU | Flexi-Van Leasing, Inc. |
| ADCX | Adolph Coors kompaniyasi |
| ADIX | Adirondack temir yo'llarni saqlash jamiyati (Adirondack manzarali temir yo'l) |
| ADKU | AGA A / S |
| ADMX | Archer Daniels Midland |
| ADRX | Addeleston Recycling Corporation |
| ADSX | Andrew Merrilees, Ltd. |
| AECX | Associated Electric Cooperative, Inc. |
| AEIX | Alan Eslisk |
| AEIZ | Farrell Lines, Inc. |
| AEPU | American Lines, Inc. |
| AEPX | American Electric Power Service Corporation |
| AESX | A. E. Staley ishlab chiqarish; GE Railcar Services korporatsiyasi |
| AEVX | AKZO Coatings, Inc. |
| AEX | Andersonlar |
| AFCU | Afram Lines, Inc. |
| AFCX | Atel Capital Equipment Fund |
| AFCZ | Afram Lines, Inc. |
| AFEX | Artur fermerlari lift kompaniyasi, ND |
| AFFX | AFFCAR, Inc. |
| AFIU | ABS Industrial Verification, Inc. |
| AFIZ | Agmark Foods |
| AFPX | Elyaf va plastmassa ishlab chiqaruvchi kompaniya (Ittifoq korporatsiyasi); Honeywell International |
| AFRX | AF Railway Industries, Inc. |
| AFSX | Astoriya, MChJ |
| AFTX | Amerika ozodligi poezdi |
| AGCX | Alberta Gas Chemicals, Inc.; PROCOR |
| AGEX | A. G. quvur liniyalari, Inc.; Nova Chemicals, Ltd. |
| AGFX | Anchor Gas and Fuel Company, Inc. |
| AGHX | Agrium AQSh, Inc. |
| AGIX | AGRI Financial Services, Inc.; AGRI Industries |
| AGLX | Andrews gaz suyuqligi xizmati; Andrews Petroleum |
| AGMX | Terra azot, LP |
| AGPX | AG Processing, Inc. |
| AGRX | Agrifos, MChJ |
| AGYX | Amerika gips kompaniyasi; Centrex Construction Products, Inc. |
| AHCX | Arcadian korporatsiyasi |
| AHMX | Altos Homos de Mexico, SA de CV |
| AHWZ | Tulki vodiysi va g'arbiy |
| AICX | Hoeganaes korporatsiyasi |
| AIDU | Albermarle korporatsiyasi |
| AIEU | Aviation Import Export, Inc. |
| AIIZ | III transport |
| AINX | TTX kompaniyasi (Acorn bo'limi) |
| AIPX | Atlas Iron Processors, Inc. |
| AITU | G'arbiy Intermodal |
| AJCU | Avstraliya Yaponiya konteyner liniyasi |
| AJPX | Shimoliy Amerika kimyo kompaniyasi; IMC Chemicals |
| AKFX | AKF korporatsiyasi |
| AKLU | K qatori |
| AKMX | Helm Moliyaviy Korporatsiyasi |
| AKZX | Azko Nobel Chemicals, Inc. |
| ALOX | Lyondell Petrokimyoviy; Equistar Chemicals, LP |
| ALBX | Albert shahar lifti |
| ALCX | Kanada alyuminiy kompaniyasi, Ltd.; Alcan Smelters and Chemicals, Ltd. |
| ALEX | AGRI Financial Services, Inc.; AGRI Industries |
| ALGX | Amsterdam lizing |
| ALKX | Airlake Terminal temir yo'l kompaniyasi |
| ALLX | Alliance Machine Company |
| ALLZ | Alliance Shipers |
| ALMX | Trinity Rail Management, Inc. |
| ALNX | Alberta hukumati |
| ALPX | Alberta hukumati |
| ALRX | A va R Leasing, LLP |
| ALSX | Albis Canada, Inc. |
| ALTU | VTG Vereinigte Tanklage U Transportmittel, GMBH |
| ALTX | South Illinois Railcar, Inc. |
| ALUX | Alumax of South Carolina, Inc. |
| ALWX | GE Railcar Services korporatsiyasi |
| AMAX | AMAX ko'mir kompaniyasi |
| AMBU | Amber Line, Inc. |
| AMBX | Amherst Industries, Inc.; American Boiler Works, Inc. |
| AMCX | Amoco Chemicals korporatsiyasi; Amoco Oil kompaniyasi; BP Amoco Chemical Company (Kimyoviy bo'lim) |
| AMCZ | Interbulk, Inc. |
| AMEX | Albamex; Ittifoq korxonalari |
| AMFU | Amfibiy konteyner lizing, Ltd |
| AMGX | AMG Resources Corporation |
| AMIU | Amerika dengiz sanoati |
| AMIX | Vagonlarni lizing bo'yicha mutaxassislar, Inc. |
| AMIZ | Amerika dengiz sanoati |
| AMLX | Amerika temir yo'l kompaniyasi |
| AMMU | Hyundai |
| AMMX | Amoco minerallar kompaniyasi; Kentukki-Tennessi gil kompaniyasi |
| AMNX | Amerika temir yo'l vizalari bo'yicha sheriklar |
| AMOX | Amoco Oil kompaniyasi; BP Products North America, Inc. |
| AMOZ | Amerika neft kompaniyasi |
| AMPX | GE Railcar Services korporatsiyasi |
| AMRU | Alaska Marine Lines, Inc. |
| AMRX | Konsolidatsiyalangan neft va transport kompaniyasi, Inc. |
| AMRZ | American Chassis Leasing, Inc. |
| AMSX | AllTrans boshqaruv xizmatlari korporatsiyasi |
| AMTZ | Amtrak |
| AMWX | Amway korporatsiyasi |
| AMXU | Americas Marine Express, Inc. |
| ANAU | Alliance Navigation Line, Inc. |
| ANAX | Excel Railcar Corporation; GE Rail Services korporatsiyasi |
| ANBX | Anbel korporatsiyasi |
| ANCX | Norit Americas, Inc. |
| ANDX | Andesit Rok kompaniyasi |
| ANIX | Associacion National de la Industria Quimca, A.C. |
| ANKX | A va K Railroad Materials, Inc. |
| ANSX | Ansco investitsiya kompaniyasi |
| AOCU | Oktel bilan bog'liq |
| AOCX | Amerikaning alyuminiy kompaniyasi (Alkoa) |
| AOEX | American Orient Express temir yo'li |
| AOIX | Marafon Ashland Petrol kompaniyasi |
| AOUX | Alberta va Orient Glycol Company, Ltd. |
| APAX | West Penn Power Company; Cementos Apasco, SA de CV |
| APAXX | Cementos Apasco, SA de CV |
| APCU | Amerika prezidenti Lines, Ltd. |
| APCX | Ittifoqdosh mahsulotlar kompaniyasi; Allied Lime Company |
| APEX | Apex tank avtoulovi liniyasi |
| APHX | Havo mahsulotlari polimerlari, LP |
| APIX | Hamdo'stlik rejasi, Inc. |
| APLU | Amerika prezidenti Lines, Ltd. |
| APLX | APL Land Transport Services, Inc. |
| APLZ | Amerika prezidenti Lines, Ltd. |
| APMU | Maersk chiziqlari |
| APMX | Havo mahsulotlari ishlab chiqarish kompaniyasi |
| APMZ | Maersk uskunalariga xizmat ko'rsatish kompaniyasi |
| APOX | Alabama elektr kompaniyasi |
| APRX | Air Products and Chemicals, Inc. |
| APSX | Arizona davlat xizmatlari kompaniyasi |
| APTX | Air Products and Chemicals, Inc. |
| APWX | Appalachian Power Company |
| APXX | Alberta Prairie temir yo'l ekskursiyalari |
| AQCX | Aqua-Chem, Inc. (Celaver Brooks Division) |
| ARCX | Alyaska temir yo'l vagon kompaniyasi; Arizona Rail Car, Inc. |
| ARDU | CATU konteynerlari, SA |
| AREX | Aeropres korporatsiyasi |
| ARGX | Associated Railcar, Inc. |
| ARHU | CATU konteynerlari, SA |
| ARHX | Arch mineral korporatsiyasi |
| ARIX | Arco sanoat gazlari (ning bo'linishi Arco, Inc.); GE Rail Services korporatsiyasi |
| ARJX | Bosh kimyoviy moddalar |
| ARL | Zirhli sovutgich liniyasi (muddati tugagan) |
| ARMH | Missuri Tinch okeani temir yo'li; Texas-Nyu-Meksiko temir yo'li; Doniphan, Kensett va Searcy Railway; Missuri Tinch okeani temir yo'li; Tinch okeani temir yo'llari |
| ARMN | Missuri Tinch okeani temir yo'li; Tinch okeani temir yo'llari |
| ARMX | American Rail and Marine Corporation |
| ARMZ | Armasal liniyasi |
| AROX | GATX korporatsiyasi |
| ARPX | Arco Petroleum Products kompaniyasi; BP Products North America, Inc. |
| ARRX | Anaconda minerallar kompaniyasi; Antrasit temir yo'llari tarixiy jamiyati, Inc. |
| ARSX | Aristech kimyoviy korporatsiyasi; Sunoco, Inc. |
| ARTU | CATU konteynerlari, SA |
| ARWX | Alabama River Woodlands, Inc. |
| ASCX | Algoma Steel Corporation; Armco Steel Company, LP |
| ASDX | Ittifoqdosh xizmatlar |
| ASGX | American Steel Foundries, Inc. |
| ASHU | Anchorage Sand and Gravel kompaniyasi; Ash Grove tsement kompaniyasi |
| ASHC | Maritainer France, SA |
| ASHX | General American Transport Corporation; American Soda, LLP |
| ASLX | Algoma Steamships, Ltd. |
| ASMX | Ames And Sons Mashinasi ishlaydi |
| ASRX | Amstar korporatsiyasi; Domino shakar kompaniyasi |
| ASRZ | Agri / Share kooperativi |
| ASTX | ASARCO |
| ASYX | Avondale Shipyards, Inc. |
| ATAX | Arizona tranzit yig'ilishi; Alameda yo'lak transporti boshqarmasi |
| ATCX | Ostin va Texasning markaziy temir yo'li; South Illinois Railcar, Inc. |
| ATEX | Asplundh Tree Expert Company (Temir yo'l bo'limi) |
| ATGU | Burlington Shimoliy va Santa Fe temir yo'li; BNSF temir yo'li |
| ATGX | ATEL Lizing korporatsiyasi |
| ATIU | Societe Auxillaire De Transport va D'Industries |
| ATIX | Alstom Transportation, Inc. |
| ATLU | Amerika dengiz sanoati |
| ATLX | Atlas Machine and Iron Works, Inc. |
| ATLZ | Amerika dengiz sanoati |
| ATMX | Amerika Qo'shma Shtatlari Energetika vazirligi (Albuquerque Operations Office) |
| ATOU | Atokim |
| ATTX | Trailer Train Company; TTX korporatsiyasi |
| AUBX | AQSh Plastik Lumber, Ltd. |
| AVCX | AVCO aerostrukturalar bo'limi |
| AVLU | Ittifoqdosh van chiziqlari |
| AWCX | Airco payvandlash mahsulotlari |
| AWDX | Atlantik of New York, Inc. |
| AWIX | Albright va Wilson Americas, Inc. |
| AWVX | 20th Century Fox |
| AWXX | East Carbon Development Company |
| AWZZ | McCloud temir yo'l kompaniyasi |
| AXCU | Ace transport kompaniyasi |
| AXXZ | Amerikaning qishloq xo'jaligi ekspresi |
| AZCX | Azcon korporatsiyasi |
| AZEX | Arizona elektr energiya kooperativi, Inc. |
| AZMX | Arizona temir yo'l muzeyi |
| AZXX | Arizona kimyoviy kompaniyasi |