| 1 | ABT | Air Brousse, Inc | Callsign: Air Brousse, | CDN | AVCODES |
| 2 | ABT | Alexandair, Inc. | | CDN | AVCODES |
| 3 | ABT | Ambeo PLC | Callsign: Ambition, Ceased operations. | GB | AVCODES |
| 4 | ABT | Air Taxi Benin | Callsign: Benways, Name changed to Benin Airlines. | DY | AVCODES |
| 5 | ABT | Benin Airlines | Callsign: Benways, Name changed from Air Taxi Benin. | DY | AVCODES |
| 6 | ABT | Air Brousse | | | ICAO1 |
| 7 | ABT | Severin Abt GmbH & Co. KG | City: Schwäbisch Gmünd | D | TRAFFIC |
| 8 | ABT | AB Tankvagnar | | SE | VKM |
| 9 | ABTA | ABT INC | | | SCAC3 |
| 10 | ABTB | ALBATRANS SPA | | | SCAC4 |
| 11 | ABTC | ARNOLD, BILL TRUCKING | | | SCAC3 |
| 12 | ABTC | ABERS TOWING & RECOVERY INC | | | SCAC4 |
| 13 | ABTD | ALL BULK TRANSPORT CORP | | | SCAC3 |
| 14 | ABTE | A B C TRUCKING INC | | | SCAC3 |
| 15 | ABTF | ABBS TRANSFER | | | SCAC3 |
| 16 | ABTG | A & B TRANSFER & STORAGE CO INC - A | | | SCAC4 |
| 17 | ABTI | AB-TEX TRANSFER & STORAGE COMPANY | | | SCAC3 |
| 18 | ABTJ | ABELL TRUCKING | | | SCAC3 |
| 19 | ABTJ | ABSTRACT CARRIERS INC | | | SCAC4 |
| 20 | ABTK | A B C TRUCK LINES | | | SCAC3 |
| 21 | ABTK | ABRAHAMSON TRUCKING | | | SCAC4 |
| 22 | ABTL | ABBOTT TRANSFER LINE, INC | | | SCAC3 |
| 23 | ABTL | ABT FREIGHT LINES INC | | | SCAC4 |
| 24 | ABTM | ART BOAT TOURING INC | | | SCAC4 |
| 25 | ABTN | ALABAMA TRANSFER & STORAGE CO INC | | | SCAC3 |
| 26 | ABTN | AMERICAN BEST TRANSPORTATION INC | | | SCAC4 |
| 27 | ABTO | ALLBEST TRANSFER & WAREHOUSE | | | SCAC3 |
| 28 | ABTO | A & B TRUCKING CO | | | SCAC4 |
| 29 | ABTP | ABERCROMBIE TRANSPORTATION CO | | | SCAC4 |
| 30 | ABTQ | A B C TRANSFER CO | | | SCAC3 |
| 31 | ABTQ | AB TRANSPORT LLC | | | SCAC4 |
| 32 | ABTR | A & B TRANSPORT | | | SCAC4 |
| 33 | ABTR | AB Transitio | | SE | VKM |
| 34 | ABTS | ABCO TRANSPORTATION INC | | | SCAC4 |
| 35 | ABTT | ABLT TRUCKING INC | | | SCAC3 |
| 36 | ABTT | ABT INC | | | SCAC4 |
| 37 | ABTV | AB TRANSFER INC | | | SCAC3 |
| 38 | ABTV | A BEST MOVERS INC | | | SCAC4 |
| 39 | ABTW | ABC TOWING INC | | | SCAC3 |
| 40 | ABTX | General Electric Railcar Services Corp. | added 1/1984; 1/1985-1/1994; eliminated 10/1994 | | NAKINA |
| 41 | ABTX | North American Car Corp. | added 4/1966; 10/1966-1/1980; eliminated 1/1984 | | NAKINA |
| 42 | ABTX | Aubrey Bartlett | 7/1923 | | NAKINA |
| 43 | ABTX | North American Car Corp. | added 4/66; 10/66-1/80 | | NRHS |
| 44 | ABTX | General Electric Railcar Services Corp. | 1/94; eliminated 10/94 | | NRHS |
| 45 | ABTX | *AUBREY BARTLETT | | | PWRC |
| 46 | ABTX | *(NATX) G.E. RAILCAR SERVICES (ABBOTT LABS-LESSEE) | | | PWRC |
| 47 | ABTX | Aubrey Bartlett (General Electric Railcar Services Corp.) | | | RSRV |
| 48 | ABTY | ABDER TRANSIT SYSTEMS LTD | | | SCAC4 |
