| 6301 | TMPT | THOMPSON, DALE TRUCKING | | | SCAC4 |
| 6302 | TMPU | T.M.P TRANS MODAL | | F | BIC |
| 6303 | TMPU | T M P TRANS MODAL | | | SCAC4 |
| 6304 | TMPV | THOMPSON TRANSPORTATION SERVICES IN | | | SCAC4 |
| 6305 | TMPX | Texas Municipal Power Agency | added 1/1982; eliminated 5/1983; added 10/1983; 1/1994; eliminated 10/1996; 7/2000-7/2005 (not listed) | | NAKINA |
| 6306 | TMPX | Texas Municipal Power Agency | added 1/82; eliminated 5/83; added 10/83; 1/94; eliminated 10/96; 7/2000 | | NRHS |
| 6307 | TMPX | TEXAS MUNICIPAL POWER AGENCY | | | PWRC |
| 6308 | TMPX | Texas Municipal Power Agency | | | RSRV |
| 6309 | TMPX | TEXAS MUNICIPAL POWER AGENCY | | | SCAC4 |
| 6310 | TMPZ | TIP Intermodal Services | | | RSRV |
| 6311 | TMPZ | GE INTERMODAL INC | | | SCAC4 |
| 6312 | TMQ | Thames Air Services & Charter Ltd. | Callsign: Thames Air, | WAN | AVCODES |
| 6313 | TMQ | Tram, Société | Callsign: Tram Air, | RIM | AVCODES |
| 6314 | TMQ | TRAM | | | ICAO1 |
| 6315 | TMQA | TRANSPORT MARIO CLOUTIER | | | SCAC4 |
| 6316 | TMQD | TMT CO LTD | | | SCAC4 |
| 6317 | TMQG | TRANS-MARKETING GROUP INC | | | SCAC4 |
| 6318 | TMQH | TOMCAT MILITARY LOGISTICS LLC | | | SCAC4 |
| 6319 | TMQI | TENMET TRAILER | | | SCAC4 |
| 6320 | TMQJ | TRANSPORTES DE MAQUILAS DE CD JUARE | | | SCAC4 |
| 6321 | TMQK | TM CARRIER INC | | | SCAC4 |
| 6322 | TMQL | TMT CO LTD | | | SCAC4 |
| 6323 | TMQN | T & M TRANSPORTATION LLC | | | SCAC4 |
| 6324 | TMQP | TIMS TRANSPORT INC | | | SCAC4 |
| 6325 | TMQR | TRANS-MAQ | | | SCAC4 |
| 6326 | TMQS | TMS DELIVERY | | | SCAC4 |
| 6327 | TMQT | TMT INC | | | SCAC4 |
| 6328 | TMQV | TRANSPORTA M P SA DE CV | | | SCAC4 |
| 6329 | TMQW | TMSI LOGISTICS | | | SCAC4 |
| 6330 | TMR | Timberline Air | Callsign: Timber, | CDN | AVCODES |
| 6331 | TMR | Tamara Niger Aviation SA | Callsign: Tamara, | RN | AVCODES |
| 6332 | TMR | Timberline Air | | | ICAO1 |
| 6333 | TMR | Transports de Martigny et Régions | | CH | TRAFFIC |
| 6334 | TMR | TMR Transports de Martigny et Régions SA | | CH | VKM |
| 6335 | TMRA | TRANSP MARIO ALBERTO CAVAZOS TAMEZ | | | SCAC4 |
| 6336 | TMRA | TMRail AB | | S | TRAFFIC |
| 6337 | TMRB | TRANS-MARBER | | | SCAC4 |
| 6338 | TMRC | TREMBLAYS MOTOR COACH LLC | | | SCAC4 |
| 6339 | TMRD | TRANSPORT MAURICE RODRIGUE INC | | | SCAC4 |
| 6340 | TMRE | TRANSPORT MARIO COUTURE INC | | | SCAC4 |
| 6341 | TMRG | TRANSPORTES MANUEL RODRIGUEZ HERNAN | | | SCAC4 |
| 6342 | TMRH | TRIMHOUSE INC | | | SCAC4 |
| 6343 | TMRI | T MARC RICE GROUP | | | SCAC4 |
| 6344 | TMRL | TRANSPORTES MARLIN | | | SCAC4 |
| 6345 | TMRO | TOMPKINS, ROBERT W | | | SCAC4 |
| 6346 | TMRP | TRANS-MART TRANSPORTATION SERVICES, INC | | | SCAC1 |
| 6347 | TMRP | TRANS-MART TRANSPORTATION SERVICES | | | SCAC4 |
| 6348 | TMRQ | TRANSPORTES MARTIN | | | SCAC4 |
| 6349 | TMRT | TRANSPORT MARTIN LACOSTE | | | SCAC4 |
| 6350 | TMRU | TECMARINE LINES | | | SCAC1 |
| 6351 | TMRW | Tacoma Rail | | | RSRV |
| 6352 | TMRW | THOMPSON TIMBER TRANSPORT INC | | | SCAC4 |
| 6353 | TMRW | The Texas Mexican Ry. Co | Real: TM | USA | TRAFFIC |
| 6354 | TMRX | Peter Kiewitt Sons' Co. | 1/1980; eliminated 7/1981 | | NAKINA |
| 6355 | TMRX | Tierra Madre Consultants, Inc. | 7/2005 (not listed) | | NAKINA |
| 6356 | TMRX | Peter Kiewitt Sons' Co. | 1/80; eliminated 7/81 | | NRHS |
| 6357 | TMRX | *PETER KIEWITT SONS' CO. | | | PWRC |
| 6358 | TMRX | *TACOMA RAIL | | | PWRC |
| 6359 | TMRX | +TIERRA MADRE CONSULTANTS, INC. | | | PWRC |
| 6360 | TMRX | TIERRA MADRE CONSULTANTS INC | | | SCAC4 |
| 6361 | TMS | Temsco Helicopters, Inc. | Callsign: Temsco, | USA | AVCODES |
| 6362 | TMS | Temsco Helicopters | | | ICAO1 |
| 6363 | TMSA | TMS GROUP INC | | | SCAC4 |
| 6364 | TMSC | TACOMA MOTORFREIGHT SERVICE | | | SCAC1 |
| 6365 | TMSC | TACOMA MOTORFREIGHT SERVICE | | | SCAC4 |
| 6366 | TMSD | THOMAS, D. G., TRUCKING CO., INC | | | SCAC1 |
| 6367 | TMSD | TRANSMASTER INTERMODAL INC. | | | SCAC4 |
| 6368 | TMSE | TRANSPORT MDM ST-EVARISTE INC | | | SCAC4 |
| 6369 | TMSF | TMSI TRANSPORT | | | SCAC4 |
| 6370 | TMSG | TMS LOGISTICS INC | | | SCAC4 |
| 6371 | TMSH | T M SHIPPING INC | | | SCAC4 |
| 6372 | TMSI | TRANSWORLD MARITIME SERVICES INC | | | SCAC4 |
| 6373 | TMSJ | TALAMANTES TRUCKING S DE R L DE C V | | | SCAC4 |
| 6374 | TMSL | TOWANDA-MONROETON SHIPPERS LIFELINE, INC. | | | PWRC |
| 6375 | TMSL | TRANSPORTES MARTINEZ SALAZAR | | | SCAC4 |
| 6376 | TMSM | TRAMO LOGISTICA | | | SCAC4 |
| 6377 | TMSN | TRAMITADORES ADUANALES C V | | | SCAC4 |
| 6378 | TMSP | TRANSPORTATION MADE SIMPLE LLC | | | SCAC4 |
| 6379 | TMSS | Towanda-Monroeton Shippers Lifeline, Inc. | 1/1980-7/2005 | | NAKINA |
| 6380 | TMSS | Towanda-Monroeton Shippers Lifeline, Inc. | 1/80-7/2000 | | NRHS |
| 6381 | TMSS | TOWANDA-MONROETON SHIPPERS LIFELINE, INC. | | | PWRC |
| 6382 | TMSS | Towanda-Monroeton Shippers Lifeline | | | RSRV |
| 6383 | TMSS | TMS TRANSPORTATION MANAGEMENT SERVI | | | SCAC4 |
| 6384 | TMST | TIME MOVING & STORAGE INC | | | SCAC4 |
| 6385 | TMSW | TRANSPORTES MUSA | | | SCAC4 |
| 6386 | TMSX | Thomas Maddock's Sons Pottery | 7/1930 | | NAKINA |
| 6387 | TMSX | Thomas Maddock's Sons Pottery (Standard Sanitary Mfg. Co.) | 7/1932-7/1935 | | NAKINA |
| 6388 | TMSX | Standard Sanitary Mfg. Co. | 7/1937-4/1938 | | NAKINA |
| 6389 | TMSX | Thomas Maddock's Sons Pottery (Standard Sanitary Mfg. Co.) | Apr-38 | | NRHS |
| 6390 | TMSX | STANDARD SANITARY MFG. CO. [THOMAS MADDOCK'S SONS POTTERY] | | | PWRC |
| 6391 | TMT | Trans Midwest Airlines, Inc. | Callsign: Trans Midwest, | USA | AVCODES |
| 6392 | TMT | Titan Airways Malta Limited | IATA: TM, Callsign: Kapow, IATA Prefix: 183, | M | AVCODES |
| 6393 | TMT | Trans Midwest Airlines | | | ICAO1 |
| 6394 | TMT | Trailer Marine Transportation Corp. | 1/1980-7/2005 | | NAKINA |
| 6395 | TMT | Trailer Marine Transportation Corp. | 1/80-7/2000 | | NRHS |
| 6396 | TMT | TRAILER MARINE TRANSPORT CORP. (CROWLET MARITIME CORP.) | | | PWRC |
| 6397 | TMT | Trailer Marine Transportation Corporation | | | RSRV |
| 6398 | TMT | TRAILER MARINE TRANSPORT (CROWLEY M | | | SCAC4 |
| 6399 | TMT | Transmart Trains Limited | | UK | VKM |
| 6400 | TMTB | TRANSPORT MARTIN BELLEMARE INC | | | SCAC4 |
