| 1 | AMR | Air Specialties Corporation d/b/a Air American / Total Air | Callsign: Air Am, | USA | AVCODES |
| 2 | AMR | Air Marine | Callsign: Air Marine, | USA | AVCODES |
| 3 | AMR | Air Specialties Corporation | | | ICAO1 |
| 4 | AMR | The Arcata and Mad River R.R. Co. | added 11/1973; 1/1975-1/1985; eliminated 4/1985 | | NAKINA |
| 5 | AMR | The Arcata and Mad River R.R. Co. | added 11/73; 1/75-1/80; eliminated 4/85 | | NRHS |
| 6 | AMR | UP [ARCATA & MAD RIVER RAILROAD] | | | PWRC |
| 7 | AMR | Arcata and Mad River Railroad | | | RSRV |
| 8 | AMR | The Arcata and Mad River R.R. Co. | | USA | TRAFFIC |
| 9 | AMR | Altmark- Rail | | DE | VKM |
| 10 | AMRA | AMERICAN INTERNATIONAL RENT-A-CAR | | | SCAC3 |
| 11 | AMRA | AUTOTRANSPORTES MORA | | | SCAC4 |
| 12 | AMRB | AMERICAN RED BALL TRANSIT COMPANY, INC. | | | SCAC3 |
| 13 | AMRB | AMERICAN RED BALL TRANSIT COMPANY, | | | SCAC4 |
| 14 | AMRC | AMERIBEC TRANSPORT | | | SCAC4 |
| 15 | AMRD | AMR DELIVERIES LIMITED | | | SCAC3 |
| 16 | AMRD | AMEICAN READY MIX INC | | | SCAC4 |
| 17 | AMRE | A & M PRIORITY FREIGHT SERVICES | | | SCAC4 |
| 18 | AMRF | A & M REFRIGERATED TRANSPORTATION C | | | SCAC3 |
| 19 | AMRG | ARMSTRONG TRANSFER & STORAGE CO INC | | | SCAC3 |
| 20 | AMRG | ARMSTRONG RELOCATION COMPANY (BROKE | | | SCAC4 |
| 21 | AMRH | AMERPOL TRANSPORT INC | | | SCAC4 |
| 22 | AMRI | AMERICAN RIVER MOVING & STG INC | | | SCAC3 |
| 23 | AMRJ | ARMSTRONG, R J | | | SCAC3 |
| 24 | AMRJ | A M R TRUCKING LTD | | | SCAC4 |
| 25 | AMRK | ARAMARK UNIFORM SERVICES (CANADA) L | | | SCAC4 |
| 26 | AMRL | ALLIED METAL RECYCLING INC | | | SCAC4 |
| 27 | AMRN | AMERICAN TRANSPORT INC | | | SCAC3 |
| 28 | AMRO | AMERICARRIERS TRANSPORT INC | | | SCAC3 |
| 29 | AMRP | AMEROP SUGAR CORPORATION | | | SCAC4 |
| 30 | AMRQ | AMERSPED INC | | | SCAC3 |
| 31 | AMRQ | AGRIMETAL INC | | | SCAC4 |
| 32 | AMRR | AMAR TRANSPORT INC | | | SCAC4 |
| 33 | AMRS | AMERICAN SPIRIT TRUCKING COMPANY IN | | | SCAC3 |
| 34 | AMRT | ARKANSAS & MEMPHIS RAILWAY BRIDGE & TERMINAL CO. | | | PWRC |
| 35 | AMRT | AMERICAN RIVER TRANSPORTATION CO | | | SCAC3 |
| 36 | AMRT | AMERICAN RIVER TRANSPORTATION CO | | | SCAC4 |
| 37 | AMRTM | Aston Manor Road Transport Museum | | GB | TRAFFIC |
| 38 | AMRU | ALASKA MARINE LINES, INC. | | | PWRC |
| 39 | AMRU | Alaska Marine Lines | | | RSRV |
| 40 | AMRU | MAXU CONTAINERS, LTD. | | | SCAC4 |
| 41 | AMRV | ALCMAR LIMITED | | | SCAC4 |
| 42 | AMRW | AMERICAN-WANDELL MOVING SERVICES IN | | | SCAC3 |
| 43 | AMRW | AMERICAN WANDELL MOVING SERVICE LLC | | | SCAC4 |
| 44 | AMRX | Consolidated Oil & Transportation Co., Inc. | added 10/1997; 7/2000; eliminated 4/2003; 7/2005 (not listed) | | NAKINA |
| 45 | AMRX | Ameropan Railcar Corp. | added 1/1990; 1/1994; eliminated 10/1997 | | NAKINA |
| 46 | AMRX | American Refrigerator Transit Co. | 1/1946 (not listed); 4/1947-10/1966; eliminated 1/1969; 4/1970-1/1980 | | NAKINA |
| 47 | AMRX | American Refining Co. (American Refining Properties) | 7/1930 | | NAKINA |
| 48 | AMRX | American Refining Co. | 8/1920-7/1923 | | NAKINA |
| 49 | AMRX | American Refrigerator Transit Co. | 1/52-10/66; eliminated 1/69; 4/70-1/80 | | NRHS |
| 50 | AMRX | Ameropan Railcar Corp. | added 1/90; 1/94; eliminated 10/97 | | NRHS |
| 51 | AMRX | Consolidated Oil & Transportation Co., Inc. | added 10/97; 7/2000 | | NRHS |
| 52 | AMRX | *AMERICAN REFINING PROPERTIES (AMERICAN REFINING CO.) | | | PWRC |
| 53 | AMRX | *AMEROPAN RAILCAR CORP. [AMERICAN REFRIGERATOR TRANSIT CO.] | | | PWRC |
| 54 | AMRX | *CONSOLIDATED OIL & TRANSPORTATION CO. | | | PWRC |
| 55 | AMRX | +WESTERN FUELS & ASPGHALT SUPPLY, INC. | | | PWRC |
| 56 | AMRX | American Refining (Amerimex Rail) | | | RSRV |
| 57 | AMRX | AMEROPAN RAILCAR CORPORATION | | | SCAC3 |
| 58 | AMRY | AMER TRANSIT CO INC | | | SCAC4 |
| 59 | AMRZ | *AMERICAN CHASSIS LEASING, INC. | | | PWRC |
| 60 | AMRZ | *AMERICAN MAIZE | | | PWRC |
| 61 | AMRZ | American Chassis Leasing | | | RSRV |
| 62 | AMRZ | AMERICAN CHASSIS LEASING INC | | | SCAC4 |
