| 1 | TQE | Taxair Mexiquenses, S.A. De C.V. | Callsign: Taxair, | MEX | AVCODES |
| 2 | TQEP | TRIANGLE FAITH S A | | | SCAC4 |
| 3 | TQER | TRANSPORTES ESPECIALIZADOS RUIZ | | | SCAC4 |
| 4 | TQEX | U.S. Rail Services | added 7/1989; 1/1994; eliminated 4/1994 | | NAKINA |
| 5 | TQEX | USL Capital Rail Services | added 4/1994; eliminated 10/1996 | | NAKINA |
| 6 | TQEX | First Union Rail | added 10/1996; 7/2000-7/2005 | | NAKINA |
| 7 | TQEX | U.S. Rail Services | added 7/89; 1/94; eliminated 4/94 | | NRHS |
| 8 | TQEX | USL Capital Rail Services | added 4/94; eliminated 10/96 | | NRHS |
| 9 | TQEX | First Union Rail | added 10/96; 7/2000 | | NRHS |
| 10 | TQEX | FIRST UNION RAIL [(RUSX) USL CAPITAL RAIL SERVICES] | | | PWRC |
| 11 | TQEX | First Union Rail | | | RSRV |
