| Carrier Code | Carrier Name |
| ASUK | AZSCO AMERICA LINES |
| ASVU | AARDAL OG SUNNDAL VERK A/S |
| ASWL | AMSTEL SHIPPING COMPANY LIMITED |
| ASWU | AROS LINE AB |
| ASWW | AIR SEA WORLD WIDE LOGISTIC LTD |
| ATAU | ATLAS INTERMODAL TRANSPORT CO LTD |
| ATC | ALASKA TRAINSHIP CORP |
| ATCU | AFRICAN TRADING CORPORATION |
| ATEU | ANTILLEAN CONTAINER LEASING NV |
| ATFU | ANTRAK FREIGHT LTD |
| ATGB | ANDERSON TUG & BARGE CO |
| ATGF | ATLANTIC GULF & STEVEDORING |
| ATKS | ALICE TANKSHIPS CORPORATION |
| ATKV | ANIA TANKER CORPORATION |
| ATLU | ATLANTIC LINES LTD |
