| 1 | TXU | Atesa Aerotaxis Ecuatorianos, S.A. | Callsign: Atesa, | EC | AVCODES |
| 2 | TXU | ATESA Aerotaxis Ecuatorianos | | | ICAO1 |
| 3 | TXUP | TIMEX TRANSPORT LLC | | | SCAC4 |
| 4 | TXUS | TRUCKING EXPRESS USA INC | | | SCAC4 |
| 5 | TXUX | TU Electric | added 4/1996; 7/2000; eliminated 1/2002 | | NAKINA |
| 6 | TXUX | TXU Electric | added 1/2002; 7/2005; eliminated 1/2008 | | NAKINA |
| 7 | TXUX | Luminant | added 1/2008 | | NAKINA |
| 8 | TXUX | TU Electric | added 4/96; 7/2000 | | NRHS |
| 9 | TXUX | *TXU ELECTRIC [TU ELECTRIC] | | | PWRC |
| 10 | TXUX | +LUMINANT | | | PWRC |
| 11 | TXUX | TXU Electric | | | RSRV |
| 12 | TXUX | LUMINANT | | | SCAC4 |
