| 1 | ADI | Audeli Air Express | Callsign: Audeli, Member company of Grupo Gestair. | E | AVCODES |
| 2 | ADI | Audeli Air | | | ICAO1 |
| 3 | ADIA | ADIA CORPORATION | | | SCAC3 |
| 4 | ADIA | ADI FREIGHT SERVICES LLC | | | SCAC4 |
| 5 | ADIB | AMR DISTRIBUTION SYSTEMS | | | SCAC3 |
| 6 | ADID | AA DISTRIBUTION | | | SCAC4 |
| 7 | ADIE | ALADDIN INTERMODAL EXPRESS INC | | | SCAC3 |
| 8 | ADIF | AMBASSADOR INTERNATIONAL LTD | | | SCAC3 |
| 9 | ADIF | ADIF ( Administrador de Infraestructuras Ferroviarias) | | ES | VKM |
| 10 | ADII | A & D TERMINALS | | | SCAC3 |
| 11 | ADIK | ADIRONDACK COURIER EXPRESS | | | SCAC3 |
| 12 | ADIK | ASPERION DECKS INC | | | SCAC4 |
| 13 | ADIL | ADMIRAL TRANSPORTATION NC | | | SCAC3 |
| 14 | ADIL | ALLIANCE DISPOSAL | | | SCAC4 |
| 15 | ADIM | ADRIANA INTERNATIONAL MOVERS INC | | | SCAC3 |
| 16 | ADIM | ADRIANA INTERNATIONAL MOVERS INC | | | SCAC4 |
| 17 | ADIN | AREA DISTRIBUTION INC | | | SCAC3 |
| 18 | ADIO | ADMIRAL MOVERS INC | | | SCAC3 |
| 19 | ADIO | ABERDEEN INTERTRADE CO | | | SCAC4 |
| 20 | ADIQ | AAA DELIVERY SERVICE INC | | | SCAC3 |
| 21 | ADIR | Adirondack Ry. Corp. | 1/1980-1/1985 | | NAKINA |
| 22 | ADIR | Adirondack Ry. Corp. | Jan-80 | | NRHS |
| 23 | ADIR | ADIRONDACK RAILWAY | | | PWRC |
| 24 | ADIR | Adirondack Railway | | | RSRV |
| 25 | ADIS | AIR DISPATCH INC | | | SCAC3 |
| 26 | ADIT | ADMIRAL TRANSPORTATION | | | SCAC3 |
| 27 | ADIV | ALDIV TRANSPORTATION INC | | | SCAC3 |
| 28 | ADIV | ARNOLD TRANSPORTATION SERVICES INC | | | SCAC4 |
| 29 | ADIW | ACADIANA AUTO WRECKER | | | SCAC3 |
| 30 | ADIW | ARCTIC DRILLING INCORPORATED | | | SCAC4 |
| 31 | ADIX | Adirondack Railway Preservation Society | 7/2005 (not listed) | | NAKINA |
| 32 | ADIX | ADIRONDAK RAILWAY PRESERVATION SOCIETY | | | PWRC |
| 33 | ADIX | Adirondack Railway Preservation Society | | | RSRV |
| 34 | ADIX | ADIRONDACK RAILWAY PRESERVATION SOC | | | SCAC4 |
| 35 | ADIY | ATLANTIC DELIVERY SERVICE | | | SCAC3 |
| 36 | ADIZ | ADM INDUSTRIES | | | PWRC |
