| 1 | ACU | Aerocancun | Callsign: Aerocancun, Founded in 1989. Ceased operations in 1996. | MEX | AVCODES |
| 2 | ACU | Air Cargo Transportation System Limited | Callsign: Afrispirit, | EAK | AVCODES |
| 3 | ACU | Air Cargo Transportation System | | | ICAO1 |
| 4 | ACUA | ACTION CHARTER & TOURS INC | | | SCAC3 |
| 5 | ACUA | ALTA LOMA CHARTER INC | | | SCAC4 |
| 6 | ACUB | AMERI-CAN CUSTOM HOUSE BROKERS | | | SCAC3 |
| 7 | ACUB | ANDRADE CANTU, FRANCISCA | | | SCAC4 |
| 8 | ACUC | ARCURI CARTAGE | | | SCAC3 |
| 9 | ACUD | ACCURATE DELIVERIES | | | SCAC3 |
| 10 | ACUD | ACCURIDE INTERNATIONAL SA DE CV | | | SCAC4 |
| 11 | ACUE | AERONAUTICS COURIER EXPRESS INC | | | SCAC3 |
| 12 | ACUE | ACCESS COURIER INC | | | SCAC4 |
| 13 | ACUF | A COLUMBIA FORWARDERS INC | | | SCAC3 |
| 14 | ACUG | A C TRUCKING COMPANY | | | SCAC3 |
| 15 | ACUH | ACTIVE-ULTRAHAUL | | | SCAC3 |
| 16 | ACUI | ACCELERATED COURIER INC | | | SCAC3 |
| 17 | ACUJ | ACE TRUCKING INC | | | SCAC3 |
| 18 | ACUK | AC TRUCKING | | | SCAC3 |
| 19 | ACUL | ACME EQUIPMENT RENTAL | | | SCAC3 |
| 20 | ACUM | ATLAS COURIER CORP | | | SCAC3 |
| 21 | ACUN | ALL COUNTY COURIER INC | | | SCAC3 |
| 22 | ACUN | ATC TRUCKING LLC | | | SCAC4 |
| 23 | ACUO | ARLENES CUSTOM COACH INC | | | SCAC3 |
| 24 | ACUO | ADVANCE CUTTING & CORING LTD | | | SCAC4 |
| 25 | ACUP | AIR COURIER EXPRESS INC | | | SCAC3 |
| 26 | ACUQ | ALL COUNTIES EXPRESS INC | | | SCAC3 |
| 27 | ACUQ | ALBERTA CUSTOM TEE (2006) LTD | | | SCAC4 |
| 28 | ACUR | ACUR EXPRESS | | | SCAC3 |
| 29 | ACUR | ACURA TRANSPORT LTD | | | SCAC4 |
| 30 | ACUS | A CUSTOM LIMOUSINE INC | | | SCAC3 |
| 31 | ACUS | A CUSTOM LIMOUSINE INC | | | SCAC4 |
| 32 | ACUT | ACUTE ANGLING | | | SCAC4 |
| 33 | ACUU | ACUGREEN LTD | | | PWRC |
| 34 | ACUU | Acugreen Limited | | | RSRV |
| 35 | ACUU | ACUGREEN LTD | | | SCAC3 |
| 36 | ACUV | ACOSTA CUEVAS, SOTERO LEONEL | | | SCAC4 |
| 37 | ACUW | ASAP COURIER INC | | | SCAC3 |
| 38 | ACUY | AMERICAN COURIER | | | SCAC3 |
