| 12401 | ARL | Airlec - Air Aquitaine Transport | | | ICAO1 |
| 12402 | ARL | Armour Refrigerator Line (Armour Car Lines) | 7/1935 | | NAKINA |
| 12403 | ARL | EXPIRED - [ARMOUR REFRIGERATOR LINE (ACL)] | | | PWRC |
| 12404 | ARL | Armour Refrigerator Line | | | RSRV |
| 12405 | ARL | Arlesdale Miniature Railway | | GB | TRAFFIC |
| 12406 | ARL | AR Logistic Consulting GmbH | | DE | VKM |
| 12407 | ARLC | ARTHUR, LAWRENCE C | | | SCAC3 |
| 12408 | ARLC | ARMSTRONG RELOCATION | | | SCAC4 |
| 12409 | ARLD | ARNOLD TRANSIT COMPANY | | | SCAC3 |
| 12410 | ARLD | ARRO LOGISTICA INTEGRAL SA DE CV | | | SCAC4 |
| 12411 | ARLE | ALTERNA LOGISTICS INC | | | SCAC4 |
| 12412 | ARLF | AIR-LAND FREIGHT SYSTEMS INC | | | SCAC3 |
| 12413 | ARLF | AMERILINE TRANSPORT INC | | | SCAC4 |
| 12414 | ARLH | AR-LINE TRUCKING (MEDICINE HAT) LTD | | | SCAC3 |
| 12415 | ARLH | ARL TRUCKING LTD | | | SCAC4 |
| 12416 | ARLI | ARLINGTON TRUCKING COMPANY | | | SCAC3 |
| 12417 | ARLI | AREA LOGISTICS INC | | | SCAC4 |
| 12418 | ARLIOR | Arriva Liorbus | | SK | TRAFFIC |
| 12419 | ARLJ | ALVARADO, RONNIE L JR | | | SCAC3 |
| 12420 | ARLK | ARLINGTON TRUCK COMPANY | | | SCAC3 |
| 12421 | ARLL | ARKANSAS LOUISIANA LIMESTONE CORPOR | | | SCAC3 |
| 12422 | ARLM | ARK-LA MUD CO INC | | | SCAC3 |
| 12423 | ARLM | APEX AND ROBERT E LEE MOVING AND ST | | | SCAC4 |
| 12424 | ARLN | AIRLIN TRUCKING CO INC | | | SCAC3 |
| 12425 | ARLN | ARC LOGISTICS INC | | | SCAC4 |
| 12426 | ARLN | Arriva London North | | GB | TRAFFIC |
| 12427 | ARLO | ARMSTRONG, LOGAN R | | | SCAC3 |
| 12428 | ARLP | ARISTOCRAT LIMOUSINE SERVICE INC | | | SCAC3 |
| 12429 | ARLQ | ARCO TRUCK LINES | | | SCAC3 |
| 12430 | ARLQ | AIR LOGISTICS SERVICES INC | | | SCAC4 |
| 12431 | ARLR | ARLINGTON MOVERS-STORAGE INC | | | SCAC3 |
| 12432 | ARLR | ANDERSEN RACING LLC | | | SCAC4 |
| 12433 | ARLS | ARLINGTON SALVAGE AND WRECKER COMPA | | | SCAC3 |
| 12434 | ARLS | ARLINGTON SALVAGE AND WRECKER COMPA | | | SCAC4 |
| 12435 | ARLS | Arriva London South | | GB | TRAFFIC |
| 12436 | ARLU | A&R Logistics | | | RSRV |
| 12437 | ARLU | ARMADA LINES LTD. | | | SCAC3 |
| 12438 | ARLU | A & R INTERMODAL INC | | | SCAC4 |
| 12439 | ARLV | AREA DELIVERY SERVICE | | | SCAC3 |
| 12440 | ARLV | ARIEL SHIPPING CORPORATION | | | SCAC4 |
| 12441 | ARLW | A & R LEASING INC | | | SCAC3 |
| 12442 | ARLX | Armour and Co. | added 7/1969; 4/1970-1/1975; eliminated 1/1978 | | NAKINA |
| 12443 | ARLX | A&R Leasing LLC | 7/2005 (not listed) | | NAKINA |
| 12444 | ARLX | Armour Car Lines | eliminated 7/1969 | | NAKINA |
| 12445 | ARLX | Armour Refrigerator Line | 10/1966 | | NAKINA |
| 12446 | ARLX | Armour Refrigerator Line (Armour Car Lines) | 7/1935-7/1965 | | NAKINA |
| 12447 | ARLX | Armour Car Lines (Armour Refrigerator Line) | 4/38-7/65 | | NRHS |
| 12448 | ARLX | Armour Car Lines | eliminated 7/69 | | NRHS |
| 12449 | ARLX | Armour and Co. | added 7/69; 4/70-1/75; eliminated 1/78 | | NRHS |
| 12450 | ARLX | *ARMOUR AND CO. [ARMOUR REFRIGERATOR LINE (ACL)] | | | PWRC |
| 12451 | ARLX | +A & R LEASING LLC | | | PWRC |
| 12452 | ARLX | ARMOUR REFRIGERATOR LINE | | | SCAC3 |
| 12453 | ARLX | A & R LEASING LIMITED LIABILITY COR | | | SCAC4 |
| 12454 | ARLX | Armour Refrigerator Line | Real: ARL | USA | TRAFFIC |
| 12455 | ARLY | ATLANTIC RELOCATION SYSTEMS | | | SCAC4 |
| 12456 | ARM | Aeromarket Express | Callsign: Amex, | E | AVCODES |
| 12457 | ARM | Armadillo Airways Helicopters | Callsign: Heli Shuttle, | USA | AVCODES |
| 12458 | ARM | Sky One | Callsign: Sunsky, Name changed to Megaviation Srl | MD | AVCODES |
| 12459 | ARM | Megaviation Srl | Callsign: Sunsky, Name changed from Sky One. | MD | AVCODES |
| 12460 | ARM | Aeromarket Express | | | ICAO1 |
| 12461 | ARM | Armenian Railway CJSC | | AM | VKM |
| 12462 | ARMA | ARMETTA TRUCKING INC | | | SCAC4 |
| 12463 | ARMC | ARCADIAN MOTOR CARRIERS | | | SCAC3 |
| 12464 | ARMC | ARIES MARINE CORP | | | SCAC4 |
| 12465 | ARMD | Arnaud Railway | | | RSRV |
| 12466 | ARMD | Arnaud Railway | | USA | TRAFFIC |
| 12467 | ARME | ARM TRANSPORT | | | SCAC4 |
| 12468 | ARMEX | Przedsiębiorstwo Inżynieryjno-Budowlane ARMEX Sp. z o.o | | PL | VKM |
| 12469 | ARMF | AIR MATES TRUCKING CO | | | SCAC3 |
| 12470 | ARMF | ARMAFER S.r.l. | | IT | VKM |
| 12471 | ARMG | ARNOLD MOTOR SERVICE | | | SCAC3 |
| 12472 | ARMH | Union Pacific R.R. Co. | added 4/1997; 7/2000-7/2005 | | NAKINA |
| 12473 | ARMH | Missouri Pacific System | 1/1994; eliminated 4/1997 | | NAKINA |
| 12474 | ARMH | Doniphan, Kensett & Searcy Ry. | added 1/1976; 1/1980 | | NAKINA |
| 12475 | ARMH | Texas-New Mexico Ry. Co. | added 7/1975; eliminated 1/1976 | | NAKINA |
| 12476 | ARMH | Missouri Pacific R.R. Co. | added 1/1975; 1/1975; eliminated 7/1975 | | NAKINA |
| 12477 | ARMH | Missouri Pacific R.R. Co. | added 1/75; 1/75; eliminated 7/75 | | NRHS |
| 12478 | ARMH | Texas-New Mexico Ry. Co. | added 7/75 | | NRHS |
| 12479 | ARMH | Doniphan, Kensett & Searcy Ry. | Jan-80 | | NRHS |
| 12480 | ARMH | Missouri Pacific System | 1/94; eliminated 4/97 | | NRHS |
| 12481 | ARMH | Union Pacific R.R. Co. | added 4/97; 7/2000 | | NRHS |
| 12482 | ARMH | UP [(DKS) MISSOURI PACIFIC (LEASED THROUGH ART FROM MILLER BREWING)] | | | PWRC |
| 12483 | ARMH | Missouri Pacific Railroad (Union Pacific Railroad) | | | RSRV |
| 12484 | ARMH | AVAIL RESOURCE MANAGEMENT INC | | | SCAC4 |
| 12485 | ARMI | AURORA MOVING & STORAGE | | | SCAC3 |
| 12486 | ARMI | ARMSTRONG, B & B TRUCKING LTD | | | SCAC4 |
| 12487 | ARMJ | ARAMBEL, JOHN TRUCKING | | | SCAC3 |
| 12488 | ARMK | ARMORED TRANSPORT OF CALIFORNIA INC | | | SCAC3 |
| 12489 | ARML | ARROW MOVING & STORAGE CO | | | SCAC3 |
| 12490 | ARMN | Union Pacific R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 12491 | ARMN | Missouri Pacific System | 1/1994; eliminated 4/1997 | | NAKINA |
| 12492 | ARMN | Missouri Pacific R.R. Co. | added 11/1973; 1/1975-1/1980 | | NAKINA |
| 12493 | ARMN | Missouri Pacific R.R. Co. | added 11/73; 1/75-1/80 | | NRHS |
| 12494 | ARMN | Missouri Pacific System | 1/94; eliminated 4/97 | | NRHS |
| 12495 | ARMN | Union Pacific R.R. Co. | Jul-00 | | NRHS |
| 12496 | ARMN | MISSOURI PACIFIC RAILROAD | | | PWRC |
| 12497 | ARMN | UP [MISSOURI PACIFIC RAILROAD] | | | PWRC |
| 12498 | ARMN | Missouri Pacific Railroad (Union Pacific Railroad) | | | RSRV |
| 12499 | ARMN | ARCEMENT TRUCKING COMPANY | | | SCAC3 |
| 12500 | ARMN | ARM TRANSPORTATION INC | | | SCAC4 |
