| 1 | ASU | Airspur, Inc. | Callsign: Commuter Liner, | USA | AVCODES |
| 2 | ASU | Compania Aerea del Sur S.A. (Aerosur S.A.) | Callsign: Asur, Founded in 1993. Ceased operations. | ROU | AVCODES |
| 3 | ASU | Compania Boliviana de Transporte Aereo Privado Aer | | | ICAO1 |
| 4 | ASUA | ALSUP & ASSOCIATES | | | SCAC3 |
| 5 | ASUC | ATLAS SOUTHERN CORPORATION | | | SCAC3 |
| 6 | ASUD | ASSURED TRANSPORTATION INC | | | SCAC3 |
| 7 | ASUD | ALL SAINTS LIMITED | | | SCAC4 |
| 8 | ASUF | ASSELS, C TRUCKING | | | SCAC4 |
| 9 | ASUH | ATLANTA SOUTH 75 INC | | | SCAC4 |
| 10 | ASUI | ASSURANCE TRANSPORTATION INC | | | SCAC3 |
| 11 | ASUK | ASCO-AMERICA LINE | | | SCAC3 |
| 12 | ASUK | ASCO-AMERICA LINE | | | SCAC4 |
| 13 | ASUL | ASEAN CARRIERS LTD REDWOOD CITY CA | | | SCAC3 |
| 14 | ASUL | ABSOLUTE INTERMODAL LLC | | | SCAC4 |
| 15 | ASUN | ALL-SECURE INC | | | SCAC3 |
| 16 | ASUN | A & S TRUCKING LLC | | | SCAC4 |
| 17 | ASUO | AMERICAN SUPERIOR LIMOUSINE SERVICE | | | SCAC3 |
| 18 | ASUP | AIR SUPPORT INC | | | SCAC3 |
| 19 | ASUP | AIR SUPPORT INC | | | SCAC4 |
| 20 | ASUQ | ASHUM MOTOR EXPRESS, INC | | | SCAC3 |
| 21 | ASUQ | AGRI SALES USA INCORPORATED | | | SCAC4 |
| 22 | ASUR | ASTURIAS TRUCKING COMPANY INC | | | SCAC3 |
| 23 | ASUS | ASSURED SERVICES MOVING & STORAGE I | | | SCAC3 |
| 24 | ASUS | ALISPED USA INC | | | SCAC4 |
| 25 | ASUT | AUTO SPECIALIST INC, THE | | | SCAC4 |
| 26 | ASUU | ALCOSUISSE | | CH | BIC |
| 27 | ASUV | AMERICAN SECURITY VANLINES INC | | | SCAC3 |
| 28 | ASUW | ASAP COURIER COMPANY INC | | | SCAC4 |
| 29 | ASUY | ASBURY SYSTEM INC | | | SCAC3 |
