| 1 | TXT | Group One, Inc. d/b/a Texas Air Charters | Callsign: Texas Charter, | USA | AVCODES |
| 2 | TXT | Texas Air Charters | | | ICAO1 |
| 3 | TXTB | TRANSPORT X-TREEM | | | SCAC4 |
| 4 | TXTC | Texas Transportation Co. | added 7/1982; eliminated 1/1991; 1/1994-7/2005 | | NAKINA |
| 5 | TXTC | Texas Transportation Co. | added 7/82; eliminated 1/91; 1/94-7/2000 | | NRHS |
| 6 | TXTC | TEXAS TRANSPORTATION COMPANY | | | PWRC |
| 7 | TXTC | Texas Transportation | | | RSRV |
| 8 | TXTE | TRIMEX TRANSPORTATION SERVICES INC | | | SCAC4 |
| 9 | TXTF | TITAN TRANSPORT INC | | | SCAC4 |
| 10 | TXTG | TRANSMAX TRUCKING LTD | | | SCAC4 |
| 11 | TXTH | TEXATRANS LLC | | | SCAC4 |
| 12 | TXTK | TLC XTREME LOGISTICS | | | SCAC4 |
| 13 | TXTO | TEXAS TRANSEASTERN INC | | | SCAC4 |
| 14 | TXTP | TXT LOGISTICS | | | SCAC4 |
| 15 | TXTR | TOMEX TRANSPORT INC | | | SCAC4 |
| 16 | TXTT | TEXTILE RUBBER & CHEMICAL CO | | | SCAC4 |
| 17 | TXTW | TXT INC | | | SCAC4 |
| 18 | TXTX | Econo-Rail Corp. | added 4/1980; eliminated 10/1991 | | NAKINA |
| 19 | TXTX | Econo-Rail Corp. | added 4/80; eliminated 10/91 | | NRHS |
| 20 | TXTX | RETIRED 12-26-91 ATP (1951) [ECONO-RAIL CORP.] | | | PWRC |
| 21 | TXTX | Econo-Rail Corporation | | | RSRV |
| 22 | TXTY | TEXAS TRANSPORTION AND STORAGE SERV | | | SCAC4 |
