| 10501 | AOJ | Aero-Jet, S.A. | Callsign: Swissjet, | CH | AVCODES |
| 10502 | AOJ | Avcon Jet AG | Callsign: Asterix, | A | AVCODES |
| 10503 | AOJD | ALLRED, O J | | | SCAC3 |
| 10504 | AOJM | A-ONE (A-1) JERSEY MOVING & STORAGE | | | SCAC3 |
| 10505 | AOK | Aeroatlantico Colombia | | | ICAO1 |
| 10506 | AOK | Arkansas-Oklahoma R.R., Inc. | added 7/1996; 7/2000-7/2005; eliminated 7/2005; added 1/2006 | | NAKINA |
| 10507 | AOK | Arkansas-Oklahoma R.R., Inc. | added 7/96; 7/2000 | | NRHS |
| 10508 | AOK | ARKANSAS-OKLAHOMA RR | | | PWRC |
| 10509 | AOK | Arkansas-Oklahoma Railroad | | | RSRV |
| 10510 | AOK | ARKANSAS-OKLAHOMA RAILROAD INC | | | SCAC4 |
| 10511 | AOK | Arkansas-Oklahoma | | USA | TRAFFIC |
| 10512 | AOKA | A-OK AIR FREIGHT | | | SCAC3 |
| 10513 | AOKA | A-ONE (A-1) KITCHENS BY SIERRA INC | | | SCAC4 |
| 10514 | AOKB | A-ONE (A-1) TRUCKING | | | SCAC4 |
| 10515 | AOKC | ARGO TRUCKING CORP | | | SCAC4 |
| 10516 | AOKD | A-ONE (A-1) TRUCK LINE | | | SCAC4 |
| 10517 | AOKF | A-OKAY FORWARDERS | | | SCAC3 |
| 10518 | AOKG | AOK TRUCKING INC | | | SCAC4 |
| 10519 | AOKI | ABCO TRUCKING INC | | | SCAC4 |
| 10520 | AOKL | ACME TRUCK LINE OF OKLAHOMA INC | | | SCAC3 |
| 10521 | AOKL | ARMSTRONG RELOCATION OKLAHOMA CITY | | | SCAC4 |
| 10522 | AOKM | A OKAY MOVING & STORAGE | | | SCAC4 |
| 10523 | AOKO | A-OK MOVING & STORAGE | | | SCAC3 |
| 10524 | AOKO | A-OK MOVING & STORAGE | | | SCAC4 |
| 10525 | AOKP | A OK TRANSPORTATION INC | | | SCAC4 |
| 10526 | AOKS | A O K SHUTTLE SERVICE INC | | | SCAC3 |
| 10527 | AOKT | AOK TRUCKING | | | SCAC3 |
| 10528 | AOKT | AOK TRUCKING | | | SCAC4 |
| 10529 | AOKW | AOK TOWING INC | | | SCAC3 |
| 10530 | AOKX | Greenbrier Management Services, LLC | added 1/2010 | | NAKINA |
| 10531 | AOKX | GREENBRIER MANAGEMENT SERVICES LLC | | | SCAC4 |
| 10532 | AOL | Angkor Airlines | Callsign: Angkor Air, | K | AVCODES |
| 10533 | AOL | Air Exel Executive | Callsign: Airlease, | F | AVCODES |
| 10534 | AOL | Aeroleasing France | | F | AVCODES |
| 10535 | AOL | Aeolian Airlines S.A. | Callsign: Aeolian, Founded in 2011. | GR | AVCODES |
| 10536 | AOL | Angkor Airlines | | | ICAO1 |
| 10537 | AOLC | A-ONE (A-1) LIMOUSINE CORP | | | SCAC3 |
| 10538 | AOLC | ACORN OIL CO INC | | | SCAC4 |
| 10539 | AOLD | A ONE LOGISTICS INC | | | SCAC4 |
| 10540 | AOLE | AOL EXPRESS INC | | | SCAC3 |
| 10541 | AOLE | A (ONE) A 1 LOGISTICS | | | SCAC4 |
| 10542 | AOLF | A OLYMPIC FORWARDER INC | | | SCAC3 |
| 10543 | AOLF | AOL FREIGHT SOLUTIONS | | | SCAC4 |
| 10544 | AOLG | ACT ONE (1) LIMO-N-MESSENGER SERVIC | | | SCAC3 |
| 10545 | AOLG | AIR-OCEAN LOGISTICS INC | | | SCAC4 |
| 10546 | AOLI | A-ONE (A-1) LINES INC | | | SCAC3 |
| 10547 | AOLI | AIR & OCEANLAND INC | | | SCAC4 |
| 10548 | AOLJ | AIR OCEAN LOGISTICS INC | | | SCAC4 |
| 10549 | AOLK | ALLEGIANT OIL LLC | | | SCAC4 |
| 10550 | AOLL | APOLLO EXPRESS INC | | | SCAC3 |
| 10551 | AOLL | AIR OCEAN LOGISTICS LLC | | | SCAC4 |
| 10552 | AOLM | A-ONE (A-1) LIMOUSINE OF STONEHAM I | | | SCAC3 |
| 10553 | AOLO | A-ONE (A-1) LIMOUSINE INC | | | SCAC3 |
| 10554 | AOLO | ALPHA & OMEGA LOGISTICS INC | | | SCAC4 |
| 10555 | AOLS | A-ONE (A-1) LIMOUSINE SERVICES INC | | | SCAC3 |
| 10556 | AOLS | A-ONE (A-1) LOGISTICS INC | | | SCAC4 |
| 10557 | AOLT | ARMS, O L TRUCKING | | | SCAC3 |
| 10558 | AOLU | AFRICA OCEAN LINE, LTD. | | | SCAC3 |
| 10559 | AOLU | AFRICA OCEAN LINE, LTD. | | | SCAC4 |
| 10560 | AOLV | A-ONE (A-1) OIL SERVICES INC | | | SCAC3 |
| 10561 | AOLX | (The) American Oak Leather Co. | 7/1930-4/1947 | | NAKINA |
| 10562 | AOLX | American Oak Leather Co. | Apr-38 | | NRHS |
| 10563 | AOLX | AMERICAN OAK LEATHER CO. | | | PWRC |
| 10564 | AOLY | AMERICAN & OHIO LOCOMOTIVE CRANE CO | | | SCAC4 |
| 10565 | AOM | Air Liberte AOM | IATA: IW, Callsign: French Lines, IATA Prefix: 646, Name changed to Air Lib w.e.f. 22 September 2001. Name changed from AOM-Minerve S.A. d/b/a AOM French Airlines | F | AVCODES |
| 10566 | AOM | Air Outre Mer | IATA: QN, Name changed to AOM | F | AVCODES |
| 10567 | AOM | AOM-Minerve S.A. d/b/a AOM French Airlines | IATA: IW, Callsign: French Lines, IATA Prefix: 646, Name changed to Air Liberte AOM. Name changed to AOM-Minerve S.A. d/b/a AOM French Airlines March 1992. | F | AVCODES |
| 10568 | AOM | Andromeda Taxi Aereo, S.A. De R.L. | Callsign: Androda, | MEX | AVCODES |
| 10569 | AOM | AOM French Airlines | IATA: IW | | ICAO1 |
| 10570 | AOM | Amsterdams Openbaar vervoer Museum | | NL | TRAFFIC |
| 10571 | AOMA | ASTOR/MADISON AVENUE LIMOUSINE | | | SCAC3 |
| 10572 | AOMA | AEROMAX | | | SCAC4 |
| 10573 | AOMC | A-ONE (A-1) MERCHANTS TRUCKING CO | | | SCAC3 |
| 10574 | AOMC | Aigle - Ollon - Monthey - Champéry | | CH | TRAFFIC |
| 10575 | AOMD | A-ONE (A-1) MID STATE STORAGE INC | | | SCAC3 |
| 10576 | AOMD | ALPINO MADERAS INDUSTRIALIZADAS SA | | | SCAC4 |
| 10577 | AOME | A-ONE (A-1) MOVERS INC | | | SCAC3 |
| 10578 | AOME | ALSTOM TRANSPORT TELECITE | | | SCAC4 |
| 10579 | AOMG | A-ONE (A-1) MOVING & STORAGE COMPAN | | | SCAC3 |
| 10580 | AOMG | ASGCO MANUFACTURING INC | | | SCAC4 |
| 10581 | AOMI | A-ONE (A-1) MOVING & STORAGE CO OF | | | SCAC3 |
| 10582 | AOMJ | AUTO MOTION CAR CARRIER SERVICE INC | | | SCAC3 |
| 10583 | AOMM | A-ONE (A-1) MOBILE HOME SERVICE | | | SCAC3 |
| 10584 | AOMN | A-ONE (A-1) MOVING & STORAGE | | | SCAC3 |
| 10585 | AOMN | ALCOM INCORPORATED | | | SCAC4 |
| 10586 | AOMO | A-ONE (A-1) MOVERS TRANSFER & STORA | | | SCAC3 |
| 10587 | AOMO | A-ONE (A-1) MOVERS INC | | | SCAC4 |
| 10588 | AOMP | A-ONE (A-1) MOVING & STORAGE INC | | | SCAC3 |
| 10589 | AOMP | ART OF MICHAEL PAPE, THE | | | SCAC4 |
| 10590 | AOMQ | A-ONE (A-1) MOVING & STORAGE | | | SCAC3 |
| 10591 | AOMQ | A-ONE (A-1) MOVING & STORAGE | | | SCAC4 |
| 10592 | AOMR | A-ONE (A-1) MOVERS | | | SCAC3 |
| 10593 | AOMR | AUTO MOVERS | | | SCAC4 |
| 10594 | AOMS | A-ONE (A-1) MOVING & STORAGE INC | | | SCAC3 |
| 10595 | AOMV | A-ONE (A-1) MOVING & STORAGE INC | | | SCAC3 |
| 10596 | AOMY | A-ONE (A-1) MOVING & STORAGE CO INC | | | SCAC3 |
| 10597 | AON | Aero Entreprise | Callsign: Aero Enterprose, | F | AVCODES |
| 10598 | AON | Air One, Inc. | Callsign: Gateway, | USA | AVCODES |
| 10599 | AON | Aero Entreprise | | | ICAO1 |
| 10600 | AONA | A-ONE-A (A-1-A) FUTURA MOVING AND S | | | SCAC3 |
