| 8201 | TRAR | TRANSPORTES REFRIGERADOS ARAMBURO S | | | SCAC4 |
| 8202 | TRAS | TRANSCO SHIPPING (USA) INC | | | SCAC4 |
| 8203 | TRAS | Trasfeimer Trasporti Ferroviari Innovativi Meridionali S.p.A. | | IT | VKM |
| 8204 | TRASK | TRATEC SK s.r.o | Real: TRA | SK | TRAFFIC |
| 8205 | TRAU | ASSOCIATED TRANSPORT LINE | | | PWRC |
| 8206 | TRAU | Associated Transport Line | | | RSRV |
| 8207 | TRAU | ASSOCIATED TRANSPORT LINE | | | SCAC4 |
| 8208 | TRAV | TRANSPORTES VIRAMONTES | | | SCAC4 |
| 8209 | TRAV | Transavia | | | TRAFFIC |
| 8210 | TRAX | Terminal Refining Co. (Keystone Oil & Manufacturing Co.) | 8/1920 | | NAKINA |
| 8211 | TRAX | American Refrigerator Transit Co. | added 4/1954; 10/1957-4/1970; eliminated 7/1970 | | NAKINA |
| 8212 | TRAX | Railtex Corp. | added 7/1978 | | NAKINA |
| 8213 | TRAX | Railtex Inc. | 1/1980 | | NAKINA |
| 8214 | TRAX | Railtex Corp. | 1/1994 | | NAKINA |
| 8215 | TRAX | Railtex Inc. | 7/2000-7/2005 | | NAKINA |
| 8216 | TRAX | American Refrigerator Transit Co. | added 4/54; 10/57-4/70; eliminated 7/70 | | NRHS |
| 8217 | TRAX | Railtex Corp. | added 7/78 | | NRHS |
| 8218 | TRAX | Railtex Inc. | Jan-80 | | NRHS |
| 8219 | TRAX | Railtex Corp. | Jan-94 | | NRHS |
| 8220 | TRAX | Railtex Inc. | Jul-00 | | NRHS |
| 8221 | TRAX | *KEYSTONE OIL & MANUFACTURING CO. [TERMINAL REFINING CO.] | | | PWRC |
| 8222 | TRAX | +RAILTEX, INC. [AMERICAN REFRIGERATOR TRANSIT CO.] | | | PWRC |
| 8223 | TRAX | Railtex | | | RSRV |
| 8224 | TRAX | RAILTEX, INC. | | | SCAC4 |
| 8225 | TRAY | TRANSPORTADORA DE COSS S A DE C V | | | SCAC4 |
| 8226 | TRB | Ukraine Transavia | Callsign: Kirovtrans, Ceased operations | UA | AVCODES |
| 8227 | TRB | Thai Regional Aviation Company Limited d/b/a Thai Regional | IATA: RW, Designator RW recalled by IATA. | T | AVCODES |
| 8228 | TRB | Thai Regional Aviation Company Limited d/b/a Thai Regional | Name changed to Rabbit Wings Airways Company Limited. Designator RW recalled by IATA. | T | AVCODES |
| 8229 | TRB | Rabbit Wings Airways Company Limited | Name changed from Thai Regional Aviation Company Limited d/b/a Thai Regional. Designator RW recalled by IATA. | T | AVCODES |
| 8230 | TRB | Ukraine Transavia | | | ICAO1 |
| 8231 | TRBA | TRANSPORT BLANEY INC | | | SCAC4 |
| 8232 | TRBB | TRB TWO THOUSAND (2000) INC | | | SCAC4 |
| 8233 | TRBD | TRANSPORTES BANDA REFRIGERADOS | | | SCAC4 |
| 8234 | TRBG | TRICE TRUCKING INC | | | SCAC4 |
| 8235 | TRBH | TRIER TRANSPORT | | | SCAC4 |
| 8236 | TRBI | TRANSPORT RABEL INC | | | SCAC4 |
| 8237 | TRBJ | TRANSORT REGINALD JACQUES | | | SCAC4 |
| 8238 | TRBK | T.R.N. TRANSPORTATION, INC | | | SCAC1 |
| 8239 | TRBK | T R N TRANSPORTATION INC | | | SCAC4 |
| 8240 | TRBM | TRANSPORT ROBERT PRIMEAU INC | | | SCAC4 |
| 8241 | TRBP | TRANSPORTES ROCO | | | SCAC4 |
| 8242 | TRBR | TRAILER BRIDGE INC (TRUCK) | | | SCAC1 |
| 8243 | TRBR | TRAILER BRIDGE INC | | | SCAC4 |
| 8244 | TRBS | TURBINE STANDARD LTD | | | SCAC4 |
| 8245 | TRBU | CJ DARCL LOGISTICS LIMITED | | IND | BIC |
| 8246 | TRBU | DELHI ASSAM ROADWAYS CORPORATION LT | | | SCAC4 |
| 8247 | TRBW | TRENT, BRUCE TRUCKING INC | | | SCAC4 |
| 8248 | TRBX | TIMKEN ROLLER BEARING COMPANY | | | PWRC |
| 8249 | TRBX | Timken Roller Bearing | | | RSRV |
| 8250 | TRC | Trans Air Charter, Inc. | Callsign: Tracker, | USA | AVCODES |
| 8251 | TRC | Trans Air Charter | | | ICAO1 |
| 8252 | TRC | Trona Ry. Co. | 1/1941-1/1980; eliminated 1/1985; 1/1994-7/2005 | | NAKINA |
| 8253 | TRC | Trona Ry. Co. | 1/52-1/80; eliminated 1/85; 1/94-7/2000 | | NRHS |
| 8254 | TRC | TRONA RAILWAY COMPANY | | | PWRC |
| 8255 | TRC | Trona Railway | | | RSRV |
| 8256 | TRC | TRONA RAILWAY COMPANY | | | SCAC4 |
| 8257 | TRC | Trona Railway | | USA | TRAFFIC |
| 8258 | TRCA | TRACTORES Y CAMIONES DE NOGALES SA | | | SCAC4 |
| 8259 | TRCC | TEXAS RAILWAY CAR CORP. | | | PWRC |
| 8260 | TRCC | TRANSCARE LOGISTICS CORPORATION | | | SCAC4 |
| 8261 | TRCE | TRANSPORTES CADY | | | SCAC4 |
| 8262 | TRCG | TRANS-CRAFT INC | | | SCAC4 |
| 8263 | TRCI | TRI CITY VAN & STORAGE | | | SCAC4 |
| 8264 | TRCJ | TRIPLE R METALS | | | SCAC4 |
| 8265 | TRCK | TRACK MAKER INC | | | SCAC4 |
| 8266 | TRCL | TRINIDAD CORPORATION | | | SCAC1 |
| 8267 | TRCM | TRANSCONTINENTAL MARITIME LTD | | | SCAC4 |
| 8268 | TRCO | TRI-COUNTY TRANSPORTATION INC | | | SCAC4 |
| 8269 | TRCP | TRANSPORT RCB INC | | | SCAC4 |
| 8270 | TRCQ | TRANSPORTES CONDESA | | | SCAC4 |
| 8271 | TRCR | TRANSCORR LLC | | | SCAC4 |
| 8272 | TRCR | Tim Rail Cargo | Real: TRC | RO | TRAFFIC |
| 8273 | TRCS | TRACSO | | | SCAC4 |
| 8274 | TRCT | TRI-CITY TRANSPORTATION, INC | | | SCAC1 |
| 8275 | TRCT | TOLEDO REFINING COMPANY LLC | | | SCAC4 |
| 8276 | TRCV | TRI-C VENTURES INC | | | SCAC4 |
| 8277 | TRCW | TRAC-WORLD FREIGHT SERVICES INC | | | SCAC4 |
| 8278 | TRCX | Thomas Ruddy Co. | 8/1920 | | NAKINA |
| 8279 | TRCX | Texas Refining Co. | 7/1937-4/1938 | | NAKINA |
| 8280 | TRCX | North American Car Corp. | added 7/1956; 10/1957-7/1965; eliminated 10/1965 | | NAKINA |
| 8281 | TRCX | Treco Sales, Inc. | added 10/1975; 1/1980; eliminated 1/1992 | | NAKINA |
| 8282 | TRCX | Tri-County Commuter Rail Authority | 7/2000-7/2005 (not listed) | | NAKINA |
| 8283 | TRCX | Texas Refining Co. | Apr-38 | | NRHS |
| 8284 | TRCX | North American Car Corp. | added 7/56; 10/57-7/65; eliminated 10/65 | | NRHS |
| 8285 | TRCX | Treco Sales, Inc. | 1/80; eliminated 1/92 | | NRHS |
| 8286 | TRCX | Tri-County Commuter Rail Authority | Jul-00 | | NRHS |
| 8287 | TRCX | *THOMAS RUDDY CO. | | | PWRC |
| 8288 | TRCX | *TEXAS REFINING CO. | | | PWRC |
| 8289 | TRCX | *TRECO SALES, INC. | | | PWRC |
| 8290 | TRCX | *RETIRED 02-25-92 ATP (1619) [NORTH AMERICAN CAR CORP.] | | | PWRC |
| 8291 | TRCX | *TRI-COUNTY COMMUTER RAIL AUTHORITY | | | PWRC |
| 8292 | TRCX | +SOUTH FLORIDA REGIONAL TRANSPORTATION AUTHORITY | | | PWRC |
| 8293 | TRCX | Tri-Rail | | | RSRV |
| 8294 | TRCX | SOUTH FLORIDA REGIONAL TRANSPORTATI | | | SCAC4 |
| 8295 | TRCX | Tri-County Commuter Rail Authority | | USA | TRAFFIC |
| 8296 | TRCZ | TRUITT BROTHERS CANNERY | | | PWRC |
| 8297 | TRD | Trans Island Air 2000 | Callsign: Trans Island, | BDS | AVCODES |
| 8298 | TRD | Trans Island Air | | | ICAO1 |
| 8299 | TRD | TRD-Reisen | City: Dortmund | D | TRAFFIC |
| 8300 | TRDA | TRANSRAPIDOS ALICA S A DE C V | | | SCAC4 |
