The following are reporting marks assigned by the Association of American Railroads (AAR) to rail carriers operating in North America and the companies (railroads and rail equipment owners/operators) to which they were assigned. Where multiple railroads are listed on a reporting mark, their order indicates the order of the mark's assignment; the succession is usually through mergers or buyouts.

Reporting mark standard practices

An AAR reporting mark is a sequence of two to four letters that uniquely identifies the owner of a piece of railroad rolling stock. The ampersand symbol (&) is not considered part of the reporting mark. In general, the reporting mark is derived from the assigned company's initials.

Marks that end in X are assigned to rail car owners that are not common carrier railroads themselves (typically these are private car owners, leasing companies or railroad museums). Marks that end in Z are assigned to trailer owners/operators for use on equipment that does not have flanged wheels but that will be used on North American railroads in intermodal service. Marks that end in U are assigned to container owners/operators for use on equipment that will be used in intermodal service. Marks that end in any other letter are assigned to railroads for use on railroad equipment in interchange service.

External links

• Association of American Railroads (http://www.aar.org)
• Establishing and Expiring a Reporting Mark (Railinc) (http://www.railinc.com/view.cfm?cnid=185)
• Trailer, Chassis and Private Marks (Railinc) (http://www.railinc.com/view.cfm?cnid=187)

A

• AA - Ann Arbor Railroad
• AALX - Advanced Aromatics, LP
• AAMX - Arrendadora de Carros de Ferrocarril, SA
• AAR - Association of American Railroads
• AATX - Ampacet Corporation
• AAX - Agrico Chemical Company
• AB - Akron Barberton Cluster Railway
• ABB - Akron and Barberton Belt Railroad
• ABBX - Abbott Labs
• ABC - Atlanta, Birmingham and Coast Railroad
• ABCK - Alaska British Columbia Transportation Company
• ABCX - Falcon Coal Company
• ABIX - Anheuser-Busch, Inc.
• ABL - Alameda Belt Line
• ABOX - Railbox Company; TTX Corporation
• ABPR - Aberdeen and Briar Patch Railway
• ABR - Athens Lines LLC
• ABRX - AB Rail Investments, Inc.
• ABTX - GE Railcar Services Corporation
• ABWX - Asea Brown Boveri
• AC - Algoma Central Railway; Canadian National Railway
• ACAX - Allied Chemical Company; Honeywell International
• ACBL - American Commercial Barge Lines
• ACBX - Scandinavian Oil Company, Inc.
• ACCX - Consolidation Coal Company
• ACDX - Allied Chemical Company; Honeywell International
• ACEX - Atlantic Cement Company, Inc.; Ace Cogeneration Company
• ACFX - Shippers Car Line; ACF Industries, Inc.; GE Capital Railcar Services
• ACGX - Acme Gas Corporation; Suburban Propane, LP
• ACIS - Algoma Central Railway; Canadian National Railway
• ACIX - Arkansas Chemicals, Inc.; Great Lakes Chemical Corporation
• ACJR - Ashtabula Carson Jefferson Railroad
• ACJU - American Coastal Lines Joint Venture, Inc.
• ACL - Atlantic Coast Line Railroad; Seaboard System Railroad; CSX Transportation
• ACLU - Atlantic Container Line, Ltd.
• ACLX - American Car Line Company
• ACMX - Allis-Chalmers Corporation; Voith Hydro
• ACNU - AKZO Chemie, B V
• ACOU - Associated Octel Company, Ltd.
• ACOX - Aurora Cooperative Elevator Company (grain shippers)
• ACPX - Amoco Canada Petroleum Company, Ltd.; Amoco Oil Company
• ACPZ - American Concrete Products Company
• ACRC - Andalucia and Conecuh Railroad
• ACRX - American Chrome and Chemicals, Inc.
• ACSU - Atlantic Cargo Services, AB
• ACSX - First Union Properties, Inc.; Honeywell International
• ACSZ - American Carrier Equipment
• ACTU - Associated Container Transport (Australia), Ltd.
• ACTX - Allied Chemical Company; Honeywell International
• ACUU - Acugreen Limited
• ACWR - Aberdeen Carolina and Western Railway
• ACWZ - Union Pacific Railroad
• ACXU - Atlantic Cargo Services, AB
• ACXX - Anderson Columbia Company, Inc.
• ACY - Akron, Canton and Youngstown; Norfolk Southern
• ACZX - A C Railroad Service Company
• AD - Norfolk, Franklin and Danville Railway
• ADBF - Adrian and Blissfield Railroad
• ADCU - Flexi-Van Leasing, Inc.
• ADIR - Adirondack Railway
• ADKU - AGA A/S
• ADMX - Archer Daniels Midland
• ADN - Ashley, Drew and Northern Railway; Arkansas, Louisiana and Mississippi Railroad
• ADRX - Addeleston Recycling Corporation
• ADSX - Andrew Merrilees, Ltd.
• AEC - Atlantic and East Carolina Railway
• AECX - Associated Electric Cooperative, Inc.
• AEFR - Aurora Elgin and Fox River Electric
• AEIX - Alan Eslisk
• AEIZ - Farrell Lines, Inc.
• AEPU - American Lines, Inc.
• AEPX - American Electric Power Service Corporation
• AERC - Albany and Eastern Railroad
• AESX - A. E. Staley Manufacturing; GE Railcar Services Corporation
• AEVX - AKZO Coatings, Inc.
• AEX - The Andersons
• AF - Alabama and Florida Railway
• AFCU - Afram Lines, Inc.
• AFCX - Atel Capital Equipment Fund
• AFCZ - Afram Lines, Inc.
• AFEX - Farmers Elevator Company of Arthur, ND
• AFFX - AFFCAR, Inc.
• AFIU - ABS Industrial Verification, Inc.
• AFIZ - Agmark Foods
• AFLR - Alabama and Florida Railroad
• AFPX - Fibers and Plastics Company (Allied Corporation); Honeywell International
• AFRX - AF Railway Industries, Inc.
• AFSX - Astoria, LLC
• AFTX - American Freedom Train
• AG - Galveston Railroad
• AGCR - Alamo Gulf Coast Railroad
• AGCX - Alberta Gas Chemicals, Inc.; PROCOR
• AGEX - A. G. Pipe Lines, Inc.; Nova Chemicals, Ltd.
• AGFX - Anchor Gas and Fuel Company, Inc.
• AGHX - Agrium US, Inc.
• AGIX - AGRI Financial Services, Inc.; AGRI Industries
• AGLF - Atlantic and Gulf Railroad; Knoxville and Holston River Railroad
• AGLX - Andrews Gas Liquids Service; Andrews Petroleum
• AGMX - Terra Nitrogen, LP
• AGPX - AG Processing, Inc.
• AGR - Alabama and Gulf Coast Railway
• AGRD - A and G Railroad
• AGRX - Agrifos, LLC
• AGS - Alabama Great Southern Railroad
• AGYX - American Gypsum Company; Centrex Construction Products, Inc.
• AHCX - Arcadian Corporation
• AHMX - Altos Homos de Mexico, SA de CV
• AHT - Alaska Hydro-Train
• AHW - Ahnapee and Western Railway; Green Bay and Western; Fox Valley and Western; Wisconsin Central; Canadian National Railway
• AHWZ - Fox Valley and Western
• AICX - Hoeganaes Corporation
• AIDU - Albermarle Corporation
• AIEU - Aviation Import Export, Inc.
• AIIZ - III Transportation
• AINX - TTX Company (Acorn Division)
• AIPX - Atlas Iron Processors, Inc.
• AITU - Western Intermodal
• AJCU - Australia Japan Container Line
• AJPX - North American Chemical Company; IMC Chemicals
• AKDN - Acadiana Railway
• AKFX - AKF Corporation
• AKLU - K Line
• AKMD - Arkansas Midland Railroad
• AKMX - Helm Financial Corporation
• AKZX - AKZO Nobel Chemicals, Inc.
• AL - Almanor Railroad
• ALAB - Alabama Railroad
• ALAX - Lyondell Petrochemical; Equistar Chemicals, LP
• ALBX - Albert City Elevator
• ALCX - Aluminum Company of Canada, Ltd.; Alcan Smelters and Chemicals, Ltd.
• ALEX - AGRI Financial Services, Inc.; AGRI Industries
• ALGX - Amsterdam Leasing
• ALLX - Alliance Machine Company
• ALLZ - Alliance Shippers
• ALM - Arkansas, Louisiana and Missouri Railroad
• ALMX - Trinity Rail Management, Inc.
• ALNX - Government of Alberta
• ALPX - Government of Alberta
• ALQS - Aliquippa and Southern Railroad
• ALRX - A and R Leasing, LLP
• ALS - Alton and Southern Railway
• ALSX - Albis Canada, Inc.
• ALTU - VTG Vereinigte Tanklage U Transportmittel, GMBH
• ALTX - Southern Illinois Railcar, Inc.
• ALUX - Alumax of South Carolina, Inc.
• ALWX - GE Railcar Services Corporation
• ALY - Allegheny and Eastern Railroad
• AM - Arkansas and Missouri Railroad
• AMAX - AMAX Coal Company
• AMBU - Amber Line, Inc.
• AMBX - Amherst Industries, Inc.; American Boiler Works, Inc.
• AMC - Amador Central Railroad; Arkansas, Louisiana and Mississippi Railroad
• AMCX - Amoco Chemicals Corporation; Amoco Oil Company; BP Amoco Chemical Company (Chemical Division)
• AMCZ - Interbulk, Inc.
• AMEX - Albamex; Allied Entreprises
• AMFU - Amphibious Container Leasing, Ltd.
• AMGX - AMG Resources Corporation
• AMHR - Amherst Industries, Inc.; Landisville Railroad
• AMIU - American Marine Industries
• AMIX - Railcar Leasing Specialists, Inc.
• AMIZ - American Marine Industries
• AMLX - American Railcar Company
• AMMU - Hyundai
• AMMX - Amoco Minerals Company; Kentucky-Tennessee Clay Company
• AMNX - American Railcar Leasing Partners
• AMOX - Amoco Oil Company; BP Products North America, Inc.
• AMOZ - American Oil Company
• AMPX - GE Railcar Services Corporation
• AMR - Arcata and Mad River Railroad
• AMRU - Alaska Marine Lines, Inc.
• AMRX - Consolidated Oil and Transportation Company, Inc.
• AMRZ - American Chassis Leasing, Inc.
• AMSX - AllTrans Management Services Corporation
• AMTK - Amtrak
• AMTZ - Amtrak
• AMWX - Amway Corporation
• AMXU - Americas Marine Express, Inc.
• AN - Apalachicola Northern Railroad; AN Railway
• ANAU - Alliance Navigation Line, Inc.
• ANAX - Excel Railcar Corporation; GE Rail Services Corporation
• ANBX - Anbel Corporation
• ANCX - Norit Americas, Inc.
• ANDX - Andesite Rock Company
• ANIX - Associacion National de la Industria Quimca, A.C.
• ANKX - A and K Railroad Materials, Inc.
• ANR - Angelina and Neches River Railroad
• ANSX - Ansco Investment Company
• ANY - Athabasca Northern Railway
• AOCU - Associated Octel
• AOCX - Aluminum Company of America (Alcoa)
• AOEX - American Orient Express Railway
• AOIX - Marathon Ashland Petroleum Company
• AOK - Arkansas-Oklahoma Railroad
• AOR - Aliquippa and Ohio River Railroad
• AOUX - Alberta and Orient Glycol Company, Ltd.
• APA - Apache Railway
• APAX - West Penn Power Company; Cimentos Apasco, SA de CV
• APCU - American President Lines, Ltd.
• APCX - Allied Products Company; Allied Lime Company
• APD - Albany Port District
• APEX - Apex Tank Car Line
• APHX - Air Products Polymers, LP
• APIX - The Commonwealth Plan, Inc.
• APLU - American President Lines, Ltd.
• APLX - APL Land Transport Services, Inc.
• APLZ - American President Lines, Ltd.
• APMU - Maersk Lines
• APMX - Air Products Manufacturing Company
• APMZ - Maersk Equipment Service Company
• APNC - Appanoose County Community Railroad
• APOX - Alabama Power Company
• APRX - Air Products and Chemicals Company
• APSX - Arizona Public Service Company
• APTX - Air Products and Chemicals, Inc.
• APWX - Appalachian Power Company
• APXX - Alberta Prairie Rail Excursions
• AQCX - Aqua-Chem, Inc. (Celaver Brooks Division)
• AR - Aberdeen and Rockfish Railroad
• ARA - Arcade and Attica Railroad
• ARC - Alexander Railroad Company
• ARCX - Alaska Rail Car Company; Arizona Rail Car, Inc.
• ARDP - Missouri Pacific Railroad; Union Pacific Railroad
• ARDU - CATU Containers, SA
• ARE - A and R Line, Inc.
• AREX - Aeropres Corporation
• ARGX - Associated Railcar, Inc.
• ARHU - CATU Containers, SA
• ARHX - Arch Mineral Corporation
• ARIX - Arco Industrial Gases (a division of Arco, Inc.); GE Rail Services Corporation
• ARJX - Arch Chemicals
• ARMH - Missouri Pacific Railroad; Union Pacific Railroad
• ARMN - Missouri Pacific Railroad; Union Pacific Railroad
• ARMX - American Rail and Marine Corporation
• ARMZ - Armasal Line
• ARN - Alberta RailNet, Inc.
• AROX - GATX Corporation
• ARPX - Arco Petroleum Products Company; BP Products North America, Inc.
• ARR - Alaska Railroad
• ARRX - Anaconda Minerals Company; Anthracite Railroads Historical Society, Inc.
• ARSX - Aristech Chemical Corporation; Sunoco, Inc.
• ART - American Refrigerator Transit Company
• ARTU - CATU Containers, SA
• ARW - Arkansas Western Railway
• ARWX - Alabama River Woodlands, Inc.
• ARZC - Arizona and California Railroad
• ASAB - Atlanta and St. Andrews Bay Railway; Bay Line Railroad, LLC
• ASCX - Algoma Steel Corporation; Armco Steel Company, LP
• ASDA - Asbestos and Danville
• ASDX - Allied Services
• ASFX - American Steel Foundries, Inc.
• ASGX - Anchorage Sand and Gravel Company; Ash Grove Cement Company
• ASHU - Maritainer France, SA
• ASHX - General American Transportation Corporation; American Soda, LLP
• ASLX - Algoma Steamships, Ltd.
• ASML - Atlanta, Stone Mountain and Lithonia Railway
• ASR - Allegheny Southern Railroad
• ASRW - Allegheny Southern Railway
• ASRX - Amstar Corporation; Domino Sugar Company
• ASRY - Ashland Railway
• ASRZ - Agri/Share Cooperative
• ASTX - Asarco, Inc.
• ASYX - Avondale Shipyards, Inc.
• ATAX - Arizona Transit Assembly
• ATCO - Arnold Transit
• ATCX - Southern Illinois Railcar, Inc.
• ATEX - Asplundh Tree Expert Company (Railroad Division)
• ATGU - Burlington Northern Santa Fe Railway
• ATGX - ATEL Leasing Corporation
• ATIU - Societe Auxillaire De Transport Et D'Industries
• ATIX - Alstom Transportation, Inc.
• ATLT - AT and L Railroad
• ATLU - American Marine Industries
• ATLX - Atlas Machine and Iron Works, Inc.
• ATLZ - American Marine Industries
• ATMX - United States Department of Energy (Albuquerque Operations Office)
• ATOU - Atochem
• ATRW - Anthracite Railway
• ATSF - Atchison, Topeka and Santa Fe Railway; Burlington Northern Santa Fe Railway
• ATTX - Trailer Train Company; TTX Corporation
• ATW - Atlantic and Western Railway
• AUBX - US Plastic Lumber, Ltd.
• AUG - Augusta Railroad
• AUS - Augusta and Summerville Railroad
• AVCX - AVCO Aerostructures Division
• AVL - Aroostook Valley Railroad
• AVLU - Allied Van Lines
• AVR - Allegheny Valley Railroad
• AWCX - Airco Welding Products
• AWDX - Atlantic of New York, Inc.
• AWIX - Albright and Wilson Americas, Inc.
• AWP - Atlanta and West Point; Seaboard System Railroad; CSX Transportation
• AWW - Algers Winslow and Western Railway
• AWXX - East Carbon Development Company
• AWZZ - McCloud Railway Company
• AXCU - Ace Transportation Company
• AXXZ - Agricultural Express of America
• AYSS - Allegheny and South Side
• AZCR - Arizona Central Railroad
• AZCX - Azcon Corporation
• AZEK - Arizona Electric Power Cooperative, Inc.
• AZER - Arizona Eastern Railway
• AZEX - Arizona Electric Power Cooperative, Inc.
• AZMX - Arizona Railway Museum
• AZXX - Arizona Chemical Company

B

• BA - Conrail
• BADX - Baden Investment Company
• BAEX - Farmers Elevator Company of Bondurant, IA; The Andersons
• BALX - Bayer Corporation
• BANU - Bank Winter and Co Aktiengesellschaft
• BAP - Butte, Anaconda and Pacific
• BAPX - Bay Area Piggyback, Inc.
• BAR - Bangor and Aroostook Railroad; Montreal, Maine and Atlantic
• BARU - Barons Leasing Corporation
• BARZ - Bangor and Aroostook Railroad; Montral, Maine and Atlantic
• BASX - Bay State Milling Company
• BAWX - Babcock and Wilcox Company
• BAYL - Bay Line Railroad LLC
• BAYU - Mobay Chemical Corporation
• BAYX - Union Tank Car Company; Bayer Corporation
• BAZX - Bay Chemical Company, Inc.
• BB - Buckingham Branch Railroad
• BBCX - BBC Brown Boveri, Inc.; ABB Power Generation, Inc.
• BBRX - Bombardier, Inc. (Transportation Equipment Group)
• BBSZ - Barbar Steamship Lines, Inc.
• BBTU - Bress Bulk International Bulk Transport and Consulting
• BCAX - Blue Circle, Inc.
• BCCX - Border Chemical Company, Ltd.
• BCDX - Borden Chemical, Inc. (a division of Borden, Inc.)
• BCE - British Columbia Hydro and Power Authority
• BCFX - GE Railcar Services Corporation
• BCGX - Bay Cities Gas Corporation
• BCH - British Columbia Hydro and Power Authority; Southern Railway of British Columbia
• BCIT - British Columbia Railway
• BCIU - Bay Cities Leasing Company
• BCIX - Blue Circle, Inc.
• BCJU - Bay Cities Leasing Company
• BCK - Buffalo Creek Railroad; Conrail
• BCLR - Bay Colony Railroad
• BCLU - Bibby Bros. Company
• BCMX - Bullet Concrete Materials Company
• BCNE - Canadian National Railway
• BCOL - British Columbia Railway
• BCPX - Brighton Corporation
• BCRR - Boyne City Railroad
• BCRX - GE Rail Services Corporation
• BCRY - Barrie-Collingwood Railway
• BCTX - Boise Cascade Corporation
• BCTZ - Boise Cascade Corporation
• BCVX - West Coast Express
• BCWX - Union Tank Car Company
• BCYU - Bay Cities Leasing Company; Union Pacific Railroad
• BDCX - Anchor Glass Container
• BDLX - BDL Company
• BDMX - Blue Diamond Mining, Inc.
• BDNX - Baroid Division, NL Industries, Inc.; Baroid Drilling Fluids, Inc.
• BDRV - Belvidere and Delaware River Railway
• BDTL - Ballard Terminal Railroad
• BDW - Bighorn Divide and Wyoming Railroad
• BE - Conrail
• BECX - FMC Corporation (Inorganic Chemicals Division)
• BEEM - Beech Mountain Railroad
• BEKR - Berks Rail Corporation
• BELX -