| 1 | TAT | T.A.T. European Airlines | IATA: VD, Callsign: TAT, Designator VD recalled by IATA. IATA designator changed from IJ | F | AVCODES |
| 2 | TAT | TAT European Airlines | IATA: IJ, Callsign: TAT, IJ prefix transfered to Air Liberte - Ops under TA | F | AVCODES |
| 3 | TAT | TACA Costa Rica Anonima | IATA: TI, Callsign: TACA-Costarica, Name changed from Transportes Aereos del Continente Americano - TACA Costa Rica | CR | AVCODES |
| 4 | TAT | Grupo TACA | | | ICAO1 |
| 5 | TATA | TRI A TRANSPORT INC | | | SCAC4 |
| 6 | TATB | TARA TRUCKING INCORPORATED | | | SCAC3 |
| 7 | TATB | TRI-AM TRANSPORT LLC | | | SCAC4 |
| 8 | TATC | TARANTOLA TRUCKING CO | | | SCAC3 |
| 9 | TATC | TARANTOLA TRUCKING CO INC | | | SCAC4 |
| 10 | TATD | TAYLOR TRUCKING INC | | | SCAC3 |
| 11 | TATD | TNT TRANSPORT INC | | | SCAC4 |
| 12 | TATE | TATE CO | | | SCAC3 |
| 13 | TATE | TATE TRANSPORTATION | | | SCAC4 |
| 14 | TATE | Tateyama Railway | | J | TRAFFIC |
| 15 | TATF | TANNERS TRANSFER & STORAGE OF VIRGI | | | SCAC3 |
| 16 | TATG | TATS CARTAGE INC | | | SCAC3 |
| 17 | TATG | TRANS-ART TRANSPORT AND STORAGE SER | | | SCAC4 |
| 18 | TATH | TARA TRUCKING INC | | | SCAC3 |
| 19 | TATH | TRANSPORTES TOTAL CARGO | | | SCAC4 |
| 20 | TATI | THOMAS, A TRANSFER OF SO CALIFORNIA | | | SCAC3 |
| 21 | TATJ | T & J TRUCKING INC | | | SCAC3 |
| 22 | TATN | TATONDUK OUTFITTERS LIMITED | | | SCAC4 |
| 23 | TATO | T N T TRUCKING | | | SCAC3 |
| 24 | TATP | TROPICAL AUTO TRANSPORT INC | | | SCAC3 |
| 25 | TATP | TREPANIER, ALAIN TRANSPORT LTEE | | | SCAC4 |
| 26 | TATQ | T & T TRUCKING INC | | | SCAC3 |
| 27 | TATR | TAYLOR & SON TRUCK LINES | | | SCAC3 |
| 28 | TATRA | | | CZ | TRAFFIC |
| 29 | TATU | TRINIDAD DISTILLERS LTD | | TT | BIC |
| 30 | TATU | TITANIC LTD | | | SCAC3 |
| 31 | TATU | TRINIDAD DISTILLERS LTD | | | SCAC4 |
| 32 | TATV | TAYLOR TRUCKING | | | SCAC3 |
| 33 | TATW | TRIPLE AAA TRUCKING COMPANY | | | SCAC3 |
| 34 | TATX | Tanco Transportation Corp. | added 7/1979; 1/1980; eliminated 4/1989 | | NAKINA |
| 35 | TATX | General Electric Railcar Services Corp. | 1/1994; eliminated 1/2000 | | NAKINA |
| 36 | TATX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 37 | TATX | Tanco Transportation Corp. | added 7/79; 1/80; eliminated 4/89 | | NRHS |
| 38 | TATX | General Electric Railcar Services Corp. | 1/94; eliminated 1/2000 | | NRHS |
| 39 | TATX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 40 | TATX | (NATX) GEN. ELECTRIC RAIL SERVICES CORP. [TANCO TRANSPORTATION CO.] | | | PWRC |
| 41 | TATX | Tanco Transportation Corporation | | | RSRV |
| 42 | TATX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
