| 501 | AAMG | AA MOVING & STORAGE COMPANY INC | | | SCAC3 |
| 502 | AAMG | ALL AMERICAN MOVING GROUP LLC | | | SCAC4 |
| 503 | AAMH | ALL AMERICAN MESSENGER AND CARTAGE | | | SCAC3 |
| 504 | AAMH | AMF ALL-METAL FABRICATING LIMITED | | | SCAC4 |
| 505 | AAMI | A-ACTION MOVERS INC | | | SCAC3 |
| 506 | AAMI | ALL AMERICAN XPRESS INC | | | SCAC4 |
| 507 | AAMJ | ASIAN AMERICAN MACHINE LLC | | | SCAC4 |
| 508 | AAMK | A & M EXPRESS INC | | | SCAC3 |
| 509 | AAML | A & M TRANSPORT LTD | | | SCAC3 |
| 510 | AAMM | A &A MACHINERY MOVING INC | | | SCAC4 |
| 511 | AAMN | A A MARTIN TRANSPORTATION CO INC | | | SCAC3 |
| 512 | AAMO | A & A MOVING & STORAGE | | | SCAC3 |
| 513 | AAMO | ALL ACROSS AMERICA TRANSPORTATION | | | SCAC4 |
| 514 | AAMP | ALL AMERICAN TRANSPORTATION SERVICE | | | SCAC3 |
| 515 | AAMP | ALL AMERICAN METAL PRODUCTS INC | | | SCAC4 |
| 516 | AAMQ | AAA MID ATLANTIC INC | | | SCAC3 |
| 517 | AAMR | AMERICAN ARMORED TRANSPORT INC | | | SCAC4 |
| 518 | AAMS | AACTION MOVING & STORAGE | | | SCAC4 |
| 519 | AAMU | ALBATROSS TANK LEASING B.V. | | HK | BIC |
| 520 | AAMV | ATLAS ARCHITECTURAL | | | SCAC3 |
| 521 | AAMV | ALL ABOUT MOVING | | | SCAC4 |
| 522 | AAMW | AAMOT TRUCKING | | | SCAC3 |
| 523 | AAMX | ACFA, Arrendadora de Carros de Ferrocarril, S.A. | added 4/1985; 1/1994-7/2000; eliminated 7/2003; 7/2005 (unlisted) | | NAKINA |
| 524 | AAMX | Arrendadora de Carros de Ferrocarril del Atlantico, S.A. | added 1/1975; 1/1975-1/1985; eliminated 4/1985 | | NAKINA |
| 525 | AAMX | Shippers' Car Line Division of ACF Industries, Inc. | added 1/1973 | | NAKINA |
| 526 | AAMX | Shippers' Car Line Division of ACF Industries, Inc. | added 1/73 | | NRHS |
| 527 | AAMX | Arrendadora de Carros de Ferrocarril del Atlantico, S.A. | added 1/75; 1/75-1/80; eliminated 4/85 | | NRHS |
| 528 | AAMX | ACFA, Arrendadora de Carros de Ferrocarril, S.A. | added 4/85; 1/94-7/2000 | | NRHS |
| 529 | AAMX | *SHIPPERS' CAR LINE DIV. OF ACF INDUSTRIES | | | PWRC |
| 530 | AAMX | *ACFA,ARRENDADORA DE CARROS DE FERROCARRIL,S.A. | | | PWRC |
| 531 | AAMX | +INGENIERIA Y DESARROOLO EN EQUYIP FERROVIAIRIO S.A. DE CV | | | PWRC |
| 532 | AAMX | ACF Industries Shippers Car Line Division | | | RSRV |
| 533 | AAMX | INGENIERIA Y DESARROOLLO EN EQUIPO | | | SCAC4 |
| 534 | AAMY | AALMODE TRANSPORTATION CORPORATION | | | SCAC3 |
| 535 | AAN | Oasis International Airlines | IATA: OB, Callsign: Oasis, Ceased operations in December 1996 | E | AVCODES |
| 536 | AAN | Amsterdam Airlines | IATA: FH, Callsign: Amstel, Designator FH* recalled by IATA | NL | AVCODES |
| 537 | AAN | Amsterdam Airlines BV | IATA: WD, Callsign: Amstel, Founded in 2007. Ceased operations on 31 October 2011. | NL | AVCODES |
| 538 | AAN | Andalusair | Callsign: Andalusair, Name changed to Oasis Airlines during 1987. | E | AVCODES |
| 539 | AAN | Aspan Air LLP | Callsign: Aspan Jet, | KZ | AVCODES |
| 540 | AAN | CTR Atmospherica Aviation A.S. | Callsign: Atmojet, | CZ | AVCODES |
| 541 | AAN | Oasis Airlines | | E | TRAFFIC |
| 542 | AANB | AACTION TRANSPORTATION SERVICES INC | | | SCAC3 |
| 543 | AANB | AAAA ANBER MOVING & STORAGE INC | | | SCAC4 |
| 544 | AANC | A & C TRANSPORT | | | SCAC4 |
| 545 | AAND | ANDERSON, ARNOLD | | | SCAC3 |
| 546 | AANE | AANENSON, ALEX | | | SCAC3 |
| 547 | AANF | AARON FORWARDERS INC | | | SCAC3 |
| 548 | AANG | AAA AMERICAN TOURS | | | SCAC3 |
| 549 | AANG | ALTMAN TRUCKING LLC | | | SCAC4 |
| 550 | AANI | ACME ANIMAL | | | SCAC4 |
| 551 | AANJ | AAA COACH LINES INC | | | SCAC3 |
| 552 | AANK | A & N TRUCKING LLC | | | SCAC4 |
| 553 | AANL | A-ONE (A-1) TRANSPORT LLC | | | SCAC4 |
| 554 | AANM | ALL-AMERICAN MOVING SYSTEMS | | | SCAC3 |
| 555 | AANM | ALL AMERICAN MOVING SERVICES NM | | | SCAC4 |
| 556 | AANN | AMERICAN TRANSPORTATION CO INC | | | SCAC3 |
| 557 | AANN | ACS TRANSPORTATION AND SHIPPING SER | | | SCAC4 |
| 558 | AANO | A-AAA ANYTIME | | | SCAC3 |
| 559 | AANO | AIRGAS NORPAC INC | | | SCAC4 |
| 560 | AANQ | A & A DELIVERY | | | SCAC3 |
| 561 | AANQ | ANATOLI INC | | | SCAC4 |
| 562 | AANR | AAA INTERNATIONAL COURIERS | | | SCAC3 |
| 563 | AANR | AACTION MOVING & STORAGE | | | SCAC4 |
| 564 | AANS | ALL AMERICAN TRANSFER & STORAGE | | | SCAC3 |
| 565 | AANS | ACTCO AFGHAN CONTAINER TRANSPORT CO | | | SCAC4 |
| 566 | AANT | ALL AMERICAN TRADING CORP | | | SCAC3 |
| 567 | AANT | ALIANT | | | SCAC4 |
| 568 | AANV | ANN ARBOR TECHNICAL SERVICES INC | | | SCAC4 |
| 569 | AANY | AAA CONTAINER SALES AND RENTALS LLL | | | SCAC4 |
| 570 | AAO | Atlantis Airlines | Callsign: Atlantis Air, | USA | AVCODES |
| 571 | AAO | Administracion Aeronautica Internacional, S.A. de C.V. | Callsign: Aerointer, | MEX | AVCODES |
| 572 | AAO | Atlantis Airlines (USA) | | | ICAO1 |
| 573 | AAOA | A AMATO INC | | | SCAC3 |
| 574 | AAOA | A AMATO INC | | | SCAC4 |
| 575 | AAOC | ALL CITY AIR AND OCEAN INC | | | SCAC4 |
| 576 | AAOD | AGAINST ALL ODDS TRUCKING | | | SCAC3 |
| 577 | AAOE | AARON EXPRESS INC | | | SCAC3 |
| 578 | AAOE | AMALIAS SHOES INC | | | SCAC4 |
| 579 | AAOF | ALL AROUND FREIGHT INC | | | SCAC3 |
| 580 | AAOG | AAA MOVING & STORAGE | | | SCAC3 |
| 581 | AAOG | AGENCIA ADUANAL OCHOA GOPY | | | SCAC4 |
| 582 | AAOH | A & A TRUCKING INC | | | SCAC3 |
| 583 | AAOI | ASSOCIATES AUTO TRANSPORT INC | | | SCAC3 |
| 584 | AAOI | AAON INCORPORATED | | | SCAC4 |
| 585 | AAOJ | AUTO TECH AUTO CARRIERS | | | SCAC3 |
| 586 | AAOK | ANGELO & AGNELO TRUCKING INC | | | SCAC3 |
| 587 | AAOL | AA OIL FIELD SERVICE INC | | | SCAC3 |
| 588 | AAON | AAMSCO INC | | | SCAC3 |
| 589 | AAON | ALPHA AND OMEGA TRANSPORTATION SERV | | | SCAC4 |
| 590 | AAOO | AAA MOVING & STORAGE INC | | | SCAC3 |
| 591 | AAOP | ALL ABOARD TRANSPORTATION | | | SCAC3 |
| 592 | AAOP | A & A LOGISTICS GROUP | | | SCAC4 |
| 593 | AAOQ | A & A OF ILLINOIS INC | | | SCAC4 |
| 594 | AAOR | AATCO | | | SCAC3 |
| 595 | AAOS | AARON TRANSPORTATION SERVICES INC | | | SCAC3 |
| 596 | AAOT | ACTION AIRPORT EXPRESS INC | | | SCAC4 |
| 597 | AAOU | ARABIAN AMERICAN OIL COMPANY | | | SCAC3 |
| 598 | AAOV | AAA MOVING SERVICES INC | | | SCAC3 |
| 599 | AAOY | ATTALA OIL CO INC | | | SCAC4 |
| 600 | AAP | Astro Air International, Inc. | Callsign: Astroair, | RP | AVCODES |
