| 1 | TXN | Texas National Airlines | Callsign: Texas National, | USA | AVCODES |
| 2 | TXN | Texas National Airlines | | | ICAO1 |
| 3 | TXNA | TRANS-AERO | | | SCAC4 |
| 4 | TXNB | TST TRANSPORTATION LLC | | | SCAC4 |
| 5 | TXNE | TRANSPORT SOLUTIONS LLC | | | SCAC4 |
| 6 | TXNG | T & S TRANSPORTATION | | | SCAC4 |
| 7 | TXNH | TRANSPORTATION INCORPORATED (SAVANN | | | SCAC4 |
| 8 | TXNJ | TRANSPORT TRANSETH | | | SCAC4 |
| 9 | TXNK | TRANSNATIONAL LINE INC | | | SCAC4 |
| 10 | TXNL | TXN LOGISTICS | | | SCAC4 |
| 11 | TXNM | TRANSPORT SOLUTIONS OF AMERICA LLC | | | SCAC4 |
| 12 | TXNN | TRANSPORT CONNECTION LLC | | | SCAC4 |
| 13 | TXNO | TEXAS NATIONAL TRANSPORT | | | SCAC4 |
| 14 | TXNQ | T & R TRANSPORT INC | | | SCAC4 |
| 15 | TXNR | TRANSPORTES NAIR SA | | | SCAC4 |
| 16 | TXNT | TEXAS NATIONAL TRANSPORT INC | | | SCAC4 |
| 17 | TXNW | Texas North Western Ry. Co. | added 1/1983; 1/1994; eliminated 7/1995; 7/2000-7/2005 | | NAKINA |
| 18 | TXNW | Texas North Western Ry. Co. | added 1/83; 1/94; eliminated 7/95; 7/2000 | | NRHS |
| 19 | TXNW | TEXAS NORTH WESTERN RAILWAY CO. | | | PWRC |
| 20 | TXNW | Texas North Western Railway | | | RSRV |
| 21 | TXNW | TEXAS NORTH WESTERN RAILWAY | | | SCAC4 |
| 22 | TXNY | TRANSPORT Y | | | SCAC4 |
