| 8301 | TRDB | TRANSPORT R DIONNE INC | | | SCAC4 |
| 8302 | TRDE | TRANSPORTES REFRIGERADOS DE ESTACIO | | | SCAC4 |
| 8303 | TRDH | TRANSPORTES DIAZ | | | SCAC4 |
| 8304 | TRDI | TRANSPORT RONADO INC | | | SCAC4 |
| 8305 | TRDL | TRANSPORT DELIVERY COMPANY | | | SCAC4 |
| 8306 | TRDM | TRIPLE D TRANSPORT LTD | | | SCAC4 |
| 8307 | TRDN | TRANSPORTES REFRIGERADOS DURAN | | | SCAC4 |
| 8308 | TRDO | TRANSPORTES REFRIGERADOS SIGA | | | SCAC4 |
| 8309 | TRDP | TRANSPORT DANIEL POULIOT INC | | | SCAC4 |
| 8310 | TRDQ | TRANSPORTES REFRIGERADOS LOGISTICOS | | | SCAC4 |
| 8311 | TRDR | Transregio Deutsche Regionalbahn GmbH | Trier | D | privat-bahn.de |
| 8312 | TRDR | TRANSPORTES DURAN | | | SCAC4 |
| 8313 | TRDR | Trans Regio Deutsche Regionaleisenbahn | Real: TDR | D | TRAFFIC |
| 8314 | TRDT | TRIDENT TRUCK LINE, INC | | | SCAC1 |
| 8315 | TRDT | TRIPLE R DELIVERY SERVICE | | | SCAC4 |
| 8316 | TRDU | TRITON CONTAINER INTERNATIONAL LTD | | BM | BIC |
| 8317 | TRDU | TRIAD TRANSPORT INCORPORATED | | | PWRC |
| 8318 | TRDU | Triad Transport | | | RSRV |
| 8319 | TRDU | TRIAD TRANSPORT INC (CONTAINERS) | | | SCAC4 |
| 8320 | TRDW | TRADE WIND EXPRESS INC | | | SCAC4 |
| 8321 | TRDX | (TILX) RETIRED 08-19-92 ATP | | | PWRC |
| 8322 | TRE | Trans-Eastern Airlines Ltd. | Callsign: Trans-East, | EAK | AVCODES |
| 8323 | TRE | TRINITY RAILWAY EXPRESS | | | PWRC |
| 8324 | TRE | Trinity Railway Express | | | RSRV |
| 8325 | TRE | Trinity Railway Express | | USA | TRAFFIC |
| 8326 | TRE | TOMI - REMONT a.s. | | CZ | VKM |
| 8327 | TREB | TRANS EXPRESS LLC | | | SCAC4 |
| 8328 | TREB | Trent Barton | | GB | TRAFFIC |
| 8329 | TRED | THOR REDERI A/S | | | SCAC4 |
| 8330 | TREG | TERRELL TRUCKING LLC | | | SCAC4 |
| 8331 | TREJ | TREJO OIL COMPANY INC | | | SCAC4 |
| 8332 | TREK | TERAN ENCINAS, MANUEL | | | SCAC4 |
| 8333 | TREL | TRANSPORT REAL POIRIER INC | | | SCAC4 |
| 8334 | TREN | TALPAR EXPRESS INC | | | SCAC4 |
| 8335 | TREP | TRANSPORT EXPRESS INC | | | SCAC4 |
| 8336 | TRET | TURNER, R TRUCKING | | | SCAC4 |
| 8337 | TRET | Trentino Transporti | City: Trient | I | TRAFFIC |
| 8338 | TREU | TRIEST AG GROUP INC | | USA | BIC |
| 8339 | TREU | Triest Ag Group,Inc | | | RSRV |
| 8340 | TREU | TREFFER TRANSPORT GMBH | | | SCAC4 |
| 8341 | TREVI | Trevisan S.r.l. | | IT | VKM |
| 8342 | TREVIS | UAB Transrevis | City: Riga | LT | TRAFFIC |
| 8343 | TREW | TRI-STAR FREIGHT | | | SCAC4 |
| 8344 | TREW | Trentway-Wagar | | CDN | TRAFFIC |
| 8345 | TREX | Tetra Technologies, Inc. | added 1/1990; 1/1994; eliminated 4/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 8346 | TREX | Tetra Technologies, Inc. | added 1/90; 1/94; eliminated 4/2000; 7/2000 | | NRHS |
| 8347 | TREX | *TRINITY RAILWAY EXPRESS | | | PWRC |
| 8348 | TREX | +TETRA TECHNOLOGIES, INC. | | | PWRC |
| 8349 | TREX | Tetra Technologies | | | RSRV |
| 8350 | TREX | TETRA TECHNOLOGIES, INC. | | | SCAC4 |
| 8351 | TREZ | Trencianska Elektricka Zeleznica | | SK | TRAFFIC |
| 8352 | TRF | Air Transafrik Limited | IATA: PQ, Callsign: Transafrik, Designator PQ recalled by IATA | GH | AVCODES |
| 8353 | TRF | Taxi Air Fret | | F | AVCODES |
| 8354 | TRF | Thrust Flight | Callsign: Thrust, | USA | AVCODES |
| 8355 | TRF | Taxi Air Fret | | | ICAO1 |
| 8356 | TRFB | TRANSPORTES REFRIGERADOS BALDENEBRO | | | SCAC4 |
| 8357 | TRFD | TRANSPORTES REFRIGERA | | | SCAC4 |
| 8358 | TRFF | TRANSPORTES REFRIGERADOS DE LA FRON | | | SCAC4 |
| 8359 | TRFG | TRUST FREIGHT SERVICES INC | | | SCAC4 |
| 8360 | TRFI | TRANSPORT R FLUET INC | | | SCAC4 |
| 8361 | TRFK | TRAFIK SERVICES, INC | | | SCAC1 |
| 8362 | TRFL | TRAFFIC INTERNATIONAL CORP | | | SCAC4 |
| 8363 | TRFP | TRANSPORTES RAFAGAS DEL NORTE SA DE | | | SCAC4 |
| 8364 | TRFQ | TRANSPORTES REFRIGERADOS QUIROZ | | | SCAC4 |
| 8365 | TRFR | TRANS - AMERICAN FRT LINES INC | | | PWRC |
| 8366 | TRFR | TRANSFER | | | SCAC4 |
| 8367 | TRFSA | TRANSFESA (Transportes Ferroviarios Especiales S.A.) | | ES | VKM |
| 8368 | TRFSR | TRANSFESA RAIL S.A.U. | | ES | VKM |
| 8369 | TRFU | TRANS FREIGHT, INC | | | PWRC |
| 8370 | TRFU | Trans Freight | | | RSRV |
| 8371 | TRFU | TRANS FREIGHT LINES, INC. | | | SCAC4 |
| 8372 | TRFW | TRAFFIC WORLD | | | SCAC4 |
| 8373 | TRFX | Tiona Refining Co. | 8/1920-4/1938 | | NAKINA |
| 8374 | TRFX | Turpentine & Rosin Factors, Inc. | 1/1943-10/1957; eliminated 1/1961 | | NAKINA |
| 8375 | TRFX | Nelio Chemicals, Inc. | added 1/1961; 4/1961; eliminated 10/1964 | | NAKINA |
| 8376 | TRFX | Tiona Refining Co. | Apr-38 | | NRHS |
| 8377 | TRFX | Turpentine & Rosin Factors, Inc. | 1/52-10/57 | | NRHS |
| 8378 | TRFX | Nelio Chemicals, Inc. | Apr-61 | | NRHS |
| 8379 | TRFX | *TIONA REFINING CO. | | | PWRC |
| 8380 | TRFX | *NELIO CHEMICALS, INC. [TURPENTINE & ROSIN FACTORS, INC.] | | | PWRC |
| 8381 | TRFX | HESS CORPORATION | | | SCAC4 |
| 8382 | TRFY | TRANSPORTES REFRIGERADOS UCEC SA DE | | | SCAC4 |
| 8383 | TRFZ | TRANSCONTINENTAL REGRIGERATOR LINES, INC. | | | PWRC |
| 8384 | TRFZ | Transcontinental Refrigerator Lines | | | RSRV |
| 8385 | TRFZ | TRANSCONTINENTAL REFRIGERATOR LINES | | | SCAC4 |
| 8386 | TRG | Atlantic Island Air | Callsign: Triangle, | IS | AVCODES |
| 8387 | TRG | Tragsa (Medios Aereos) | | E | AVCODES |
| 8388 | TRG | TRAGSA (Medios Aereos) | | | ICAO1 |
| 8389 | TRG | TRUDEAU, R G | | | SCAC4 |
| 8390 | TRG | TRIANGULA Logistik GmbH | | DE | VKM |
| 8391 | TRGAZ | TRANSGAZ S.A. | | AT | VKM |
| 8392 | TRGC | THOMAS RIGGING & CONSTRUCTION CO IN | | | SCAC4 |
| 8393 | TRGE | TARGET CORPORATION | | | SCAC4 |
| 8394 | TRGF | TRANSPORT ROLLAND GAUTHIER & FILS I | | | SCAC4 |
| 8395 | TRGH | TRANSCO | | | SCAC4 |
| 8396 | TRGJ | TRANSPORTES REFRIGERADOS GARCES | | | SCAC4 |
| 8397 | TRGP | TRANSPORT GERMAIN POULIN INC | | | SCAC4 |
| 8398 | TRGQ | TRANSPORTES GARCIA | | | SCAC4 |
| 8399 | TRGT | TRIANGLE TRANSPORT INC | | | SCAC4 |
| 8400 | TRGU | TRIGAS EXPORT CA | | YV | BIC |
