| 1 | TRT | Trans Arabian Air Transport | Callsign: Trans Arabian, | SUD | AVCODES |
| 2 | TRT | Trans Arabian Air Transport | | | ICAO1 |
| 3 | TRT | TSHIUETIN RAIL TRANSPORTATION | | | PWRC |
| 4 | TRT | Tianjin Rail Transit Group Co. | | PRC | TRAFFIC |
| 5 | TRTB | TRANSPORT SERVICES LLC | | | SCAC4 |
| 6 | TRTB | Tees-side Railless Traction Board | | GB | TRAFFIC |
| 7 | TRTC | TRT INTERNATIONAL LTD | | | SCAC4 |
| 8 | TRTC | | City: Taipei | RC | TRAFFIC |
| 9 | TRTH | TRANSPORT ROGER THIBAULT INC | | | SCAC4 |
| 10 | TRTI | TR TRUCKING INC | | | SCAC4 |
| 11 | TRTJ | TRIPLE R TRUCKING OF LAURENS IOWA I | | | SCAC4 |
| 12 | TRTL | TRANSPORTES Y SERVICIOS EL TROCADER | | | SCAC4 |
| 13 | TRTM | TRANSPORTES MOR S A DE C V | | | SCAC4 |
| 14 | TRTO | TRUCK & TRAIN TRANSPORT CO | | | SCAC4 |
| 15 | TRTR | Trieste Transporti | | I | TRAFFIC |
| 16 | TRTR | Tracona Trading | | SE | VKM |
| 17 | TRTS | TRILOGY TRANSPORTATION SERVICES INC | | | SCAC4 |
| 18 | TRTT | TRIPLE T TRUCKING | | | SCAC4 |
| 19 | TRTU | CARU CONTAINERS BV | | NL | BIC |
| 20 | TRTU | CONTAINER ASSOCIATION ROTTERDAM BV | | | SCAC4 |
| 21 | TRTUR | TRANSTUR ULUSLARARASI NAKLİYAT VE TİCARET A.Ş | | TR | VKM |
| 22 | TRTX | W.J. Kirberger, Trustee | added 10/1980; 1/1994; eliminated 7/1994; 7/2000-7/2005 (not listed) | | NAKINA |
| 23 | TRTX | W.J. Kirberger, Trustee | added 10/80; 1/94; eliminated 7/94; 7/2000 | | NRHS |
| 24 | TRTX | W. J. KIRBERGER, TRUSTEE | | | PWRC |
| 25 | TRTX | W. J. Kirberger | | | RSRV |
| 26 | TRTX | W J KIRBERGER TRUSTEE | | | SCAC4 |
