| 1 | ATP | Servicios Aereos del Altiplano, S.A. de C.V. | Callsign: Altiplano, | MEX | AVCODES |
| 2 | ATP | ASTRAL Colombia - Aerotransportes Especiales Ltda. | | | ICAO1 |
| 3 | ATPA | ATLAS TRANSPORTATION COMPANY | | | SCAC3 |
| 4 | ATPA | ATLAS TRANSPORTATION COMPANY | | | SCAC4 |
| 5 | ATPB | A T S TRANSPORTATION SERVICES INC | | | SCAC3 |
| 6 | ATPB | AUTOTRANSPORTE PRASA | | | SCAC4 |
| 7 | ATPC | AIRLINES TRANSPORTATION COMPANY | | | SCAC3 |
| 8 | ATPC | AIRLINES TRANSPORTATION COMPANY | | | SCAC4 |
| 9 | ATPD | AIR TRANSPORT INC | | | SCAC3 |
| 10 | ATPD | AUTOTRANSPORTES DARMA S A DE C V | | | SCAC4 |
| 11 | ATPE | ATKINS PETROLEUM PRODUCTS INC | | | SCAC4 |
| 12 | ATPF | ATLANTIC & PACIFIC CO INC | | | SCAC3 |
| 13 | ATPG | AMERICAN TRANSPORT INC | | | SCAC3 |
| 14 | ATPG | AUTOTRANSPORTES GUARDIOLA | | | SCAC4 |
| 15 | ATPH | ACE TRANSPORTATION, INC. | | | SCAC3 |
| 16 | ATPH | ACE TRANSPORTATION LLC (N/K/A UV LO | | | SCAC4 |
| 17 | ATPI | ATLANTIC-PACIFIC VAN & STORAGE INC | | | SCAC3 |
| 18 | ATPI | ARCHER THREE P (3P) LOGISTICS | | | SCAC4 |
| 19 | ATPJ | ATPIC TRUCKING CO INC | | | SCAC3 |
| 20 | ATPK | ATKINS PICKLE COMPANY INC | | | SCAC3 |
| 21 | ATPL | ATPAC INC | | | SCAC3 |
| 22 | ATPL | ATLS | | | SCAC4 |
| 23 | ATPL | Alpha Trains Polska Sp. z o.o. | | PL | VKM |
| 24 | ATPM | ATLANTIC PORTS INTERNATIONAL | | | SCAC3 |
| 25 | ATPM | ATLANTIC PLANT MAINTENANCE INC | | | SCAC4 |
| 26 | ATPM | Assocjazzjoni Trasport Pubbliku | | M | TRAFFIC |
| 27 | ATPN | AMERICAN TRANSPORTATION MANAGEMENT | | | SCAC4 |
| 28 | ATPO | ANDERSON TRANSPORT CO | | | SCAC3 |
| 29 | ATPOL | Atlas Poland Sp. z o.o. | | PL | VKM |
| 30 | ATPQ | ACME TRANSPORT COMPANY | | | SCAC3 |
| 31 | ATPR | ARTRANSPORT INC | | | SCAC3 |
| 32 | ATPR | ALLSTAR TRANSPORT SERVICES INC | | | SCAC4 |
| 33 | ATPS | ATLANTIS TRANSPORTATION SERVICES IN | | | SCAC3 |
| 34 | ATPS | ATLANTIS TRANSPORTATION SERVICES IN | | | SCAC4 |
| 35 | ATPT | ATLANTIC PRATT OIL CO INC | | | SCAC4 |
| 36 | ATPV | ARCTIC TRANSPORT | | | SCAC3 |
| 37 | ATPX | American Tar Products Co., Inc. | 7/1930-7/1932 | | NAKINA |
| 38 | ATPX | American Tar Products Co., Inc. (Koppers Products Co.) | 7/1935-7/1936 | | NAKINA |
| 39 | ATPX | Koppers Co. | 7/1937-1/1941 | | NAKINA |
| 40 | ATPX | American Tar Products Co. | 8/1920-7/1923 | | NAKINA |
| 41 | ATPX | American Tar Products Co., Inc. (Koppers Co.) | Apr-38 | | NRHS |
| 42 | ATPX | KOPPERS CO. {AMERICAN TAR PRODUCTS CO.} | | | PWRC |
| 43 | ATPY | A TRANSPORT NORTHWEST COMPANY | | | SCAC3 |
| 44 | ATPY | ACTION PETROLEUM COMPANY LTD | | | SCAC4 |
| 45 | ATPZ | AVTEX PLANT | | | PWRC |
