| 1 | TRX | Air Terrex | Callsign: Terrex, Name changed to Air Slovakia during 1995. ICAO designator cahnegd to SVK. Established on 2 June 1993. | CZ | AVCODES |
| 2 | TRX | TraXion | 2001 - 2002 | DK | jernbanen.dk |
| 3 | TRX | Tri-State Refining Co., Inc. | 7/1930 | | NAKINA |
| 4 | TRX | Taylor Refining Co. | 1/1943-1/1946 | | NAKINA |
| 5 | TRX | TAYLOR REFINING CO. [TRI-STATE REFINING CO., INC.] | | | PWRC |
| 6 | TRX | TraXion | 2001 - 2002 | DK | TRAFFIC |
| 7 | TRXD | TRU-X UNLIMITED INC | | | SCAC4 |
| 8 | TRXE | TRAIL-X EXPRESS LTD | | | SCAC4 |
| 9 | TRXF | TRANS EXPERT FREIGHT SYSTEM INC | | | SCAC4 |
| 10 | TRXG | T REX TRUCKING | | | SCAC4 |
| 11 | TRXK | TRX TRUCKING | | | SCAC4 |
| 12 | TRXM | TRANSPORTES REF | | | SCAC4 |
| 13 | TRXN | TR TRANSPORT NATIONWIDE LLC | | | SCAC4 |
| 14 | TRXP | TEXAS REFRIGERATED XPRESS LLC | | | SCAC4 |
| 15 | TRXQ | T-REX TRANSPORTATION INC | | | SCAC4 |
| 16 | TRXS | TRANSEAS EXPRESS (D J | | | SCAC4 |
| 17 | TRXU | TRITEX LIMITED | | | SCAC4 |
| 18 | TRXV | TRASBC FREIGHT LTD | | | SCAC4 |
| 19 | TRXZ | T COMPANIES INC | | | SCAC4 |
