| 5201 | TJPT | T J | | | SCAC4 |
| 5202 | TJQL | TJAMS LOGISTICS LLC | | | SCAC4 |
| 5203 | TJR | Toledo Junction Railroad | | USA | TRAFFIC |
| 5204 | TJRA | TRANSPORTES JR | | | SCAC4 |
| 5205 | TJRE | TJR EQUIPMENT | | | SCAC4 |
| 5206 | TJRG | TRANSPORTES J R G | | | SCAC4 |
| 5207 | TJRP | THREE (3) J TRANSPORT LLC | | | SCAC4 |
| 5208 | TJRQ | TRIPPLE J AUTO RECYCLING | | | SCAC4 |
| 5209 | TJRR | TRANSPORT JEAN ROBERT INC | | | SCAC4 |
| 5210 | TJRX | Shirley M. Brooks | added 1/1986; eliminated 4/1986 | | NAKINA |
| 5211 | TJRX | S.M. Brooks | added 4/1986; 1/1994-7/2005 | | NAKINA |
| 5212 | TJRX | Shirley M. Brooks | added 1/86; eliminated 4/86 | | NRHS |
| 5213 | TJRX | S.M. Brooks | added 4/86; 1/94-7/2000 | | NRHS |
| 5214 | TJRX | S. M. BROOKS CO. | | | PWRC |
| 5215 | TJRX | S. M. Brooks | | | RSRV |
| 5216 | TJRX | S M BROOKS | | | SCAC4 |
| 5217 | TJS | Tyrolean Jet Service | Callsign: Tyroljet, ICAO designator changed from TYJ | A | AVCODES |
| 5218 | TJS | Tyrolean Jet Service | | | ICAO1 |
| 5219 | TJS | TJS Resisedienst GmbH | City: Aue | D | TRAFFIC |
| 5220 | TJSB | TRANSPORTES JOSE BELISARIO RUBIO AR | | | SCAC4 |
| 5221 | TJSC | TJS TRANSPORTATION LLC | | | SCAC4 |
| 5222 | TJSI | THREE (3) J'S TRANSPORT INC | | | SCAC4 |
| 5223 | TJSL | T.J.S. LEASING&HOLDING CO., INC. | | | SCAC1 |
| 5224 | TJSL | T J S LEASING & HOLDING CO INC | | | SCAC4 |
| 5225 | TJSP | TIJUANA SERVICES TRANSPORT | | | SCAC4 |
| 5226 | TJSQ | TJS TRUCKING LLC | | | SCAC4 |
| 5227 | TJSU | TONG JOO SHIPPING PTE LTD. | | | SCAC1 |
| 5228 | TJSV | TJS TRANSPORTATION SERVICES | | | SCAC4 |
| 5229 | TJSY | TRANSPORT JESSY LORD INC | | | SCAC4 |
| 5230 | TJT | Twin Jet | IATA: T7, Callsign: Twinjet, IATA Prefix: 294, Established in May 2001. Commenced operations in October 2001. | F | AVCODES |
| 5231 | TJT | Twin Jet | IATA: T7 | | ICAO1 |
| 5232 | TJTA | TANRAJ TRANSPORT INC | | | SCAC4 |
| 5233 | TJTB | TRIPLE J TRANSPORT | | | SCAC4 |
| 5234 | TJTF | TRANSPORTES JABA | | | SCAC4 |
| 5235 | TJTJ | T J TRUCKING CO INC | | | SCAC4 |
| 5236 | TJTK | T & J TRUCKING INC | | | SCAC4 |
| 5237 | TJTL | T-J TRANSPORT INC | | | SCAC4 |
| 5238 | TJTO | T J T INC A CORPORATION OF WASHINGT | | | SCAC4 |
| 5239 | TJTP | T & J TRANSPORT INC | | | SCAC4 |
| 5240 | TJTQ | TRANSPORT J M CHAMPEAU INC | | | SCAC4 |
| 5241 | TJTR | T & J TRUCKING, LLC | | | SCAC4 |
| 5242 | TJTS | TJ TRANSPORT | | | SCAC4 |
| 5243 | TJUA | TORRES, JUAN C | | | SCAC4 |
| 5244 | TJVR | TRANSPORTES JAVIER RODRIGUEZ | | | SCAC4 |
| 5245 | TJWI | TRANSPORT JOHN WATSON INC | | | SCAC4 |
| 5246 | TJWS | TEJAS WAREHOUSE SYSTEM | | | SCAC4 |
| 5247 | TJXE | THREE (3) J'S EXPRESS | | | SCAC4 |
| 5248 | TJXI | TROJAN TRANSPORT INC | | | SCAC4 |
| 5249 | TJXL | TJ TRANSPORTATION LLC | | | SCAC4 |
| 5250 | TJXP | TJ'S EXPRESS | | | SCAC4 |
| 5251 | TJXS | T & J OIL EXPRESS INC | | | SCAC4 |
| 5252 | TJYE | TRES JOYAS EXPRESS | | | SCAC4 |
| 5253 | TJYG | TRANSPORTES JYG | | | SCAC4 |
| 5254 | TJYV | TRANSPORT JEAN-YVES MERCIER INC | | | SCAC4 |
| 5255 | TJZU | HANGZHOU TIEJI FREIGHT CO., LTD | | PRC | BIC |
| 5256 | TK | Turkish Airlines, Inc. | ICAO: THY, Callsign: Turkish, IATA Prefix: 235, Name changed from Turk Hava Yollari (Turkish Airlines). ICAO callsign changed from Turkair | TR | AVCODES |
| 5257 | TK | Turk Hava Yollari (Turkish Airlines) | ICAO: THY, Callsign: Turkair, IATA Prefix: 235, Name changed to Turkish Airlines, Inc. ICAO callsign changed to Turkish | TR | AVCODES |
| 5258 | TK | Tuskegee R.R. | 7/1954-4/1961 | | NAKINA |
| 5259 | TK | Tuskegee R.R. | 10/57-4/61 | | NRHS |
| 5260 | TK | TUSKEGEE RR | | | PWRC |
| 5261 | TK | Cargorail - Transportes de Mercadorias, S.A. | | PT | VKM |
| 5262 | TKA | Air Troika | Callsign: Troika, | RUS | AVCODES |
| 5263 | TKA | Transliz Aviation (K) Ltd. | Callsign: Tourliz, | EAK | AVCODES |
| 5264 | TKAB | T K TRUCKING LLC | | | SCAC4 |
| 5265 | TKAB | Svenska Tågkompaniet AB | 1999 - | S | svenska-lok.se |
| 5266 | TKAB | Svenska Tagkompaniet AB | 1999 - | S | TRAFFIC |
| 5267 | TKAB | Svenska Tågkompagniet AB | | SE | VKM |
| 5268 | TKAC | TRUCK AIR OF THE CAROLINAS, INC | | | SCAC1 |
| 5269 | TKAE | TRU-KARE | | | SCAC4 |
| 5270 | TKAF | TAKE ACTION NOW CORPORATION | | | SCAC4 |
| 5271 | TKAG | TRUCK ACCESSORIES GROUP LLC | | | SCAC4 |
| 5272 | TKAL | TRUCKALOCITY | | | SCAC4 |
| 5273 | TKAM | THANKS A LOT | | | SCAC4 |
| 5274 | TKANKO | Toyokanko | Part of the Keikyu Group | J | TRAFFIC |
| 5275 | TKAQ | TRANSPORT KATO | | | SCAC4 |
| 5276 | TKAR | TRUCK AMERICAN CARRIERS INC | | | SCAC4 |
| 5277 | TKAS | TAKASE ADD SYSTEM INC | | | SCAC4 |
| 5278 | TKBY | TREK BICYCLE CORP | | | SCAC4 |
| 5279 | TKC | Tikal Jets, S.A. | IATA: A5, Callsign: Tikal, IATA designator changed to WU*. IATA designator changed from 2E* | GCA | AVCODES |
| 5280 | TKC | Tikal Jets, S.A. | IATA: 2E, Callsign: Tikal, IATA designator changed to A5* | GCA | AVCODES |
| 5281 | TKC | Tikal Jets, S.A. | IATA: WU, Callsign: Tikal, IATA designator changed to WU. IATA designator previously changed from 2E*, Then from A5* | GCA | AVCODES |
| 5282 | TKC | Tikal Jets, S.A. | IATA: WU, Callsign: Tikal, Designator WU recalled by IATA. IATA designator changed from WU*. IATA designator previously changed from 2E*, Then from A5* | GCA | AVCODES |
| 5283 | TKC | Tikal Jets, S.A. | Callsign: Tikal, Ceased operations. Designator WU recalled by IATA. IATA designator changed from WU*. IATA designator previously changed from 2E*, Then from A5* | GCA | AVCODES |
| 5284 | TKC | THY Hava Kargo Tasimaciligi A.S. | Callsign: Trukish Cargo, | TR | AVCODES |
| 5285 | TKC | Tikal Jets Airlines | | | ICAO1 |
| 5286 | TKCB | TAIKO CARRIERS INC | | | SCAC4 |
| 5287 | TKCC | TRUCKLOAD CARRIERS OF CHATTANOOGA L | | | SCAC4 |
| 5288 | TKCD | TRANSTANK OF COLORADO LLC | | | SCAC4 |
| 5289 | TKCE | TRUCK CITY EXPRESS LLC | | | SCAC4 |
| 5290 | TKCH | THERMO KING | | | SCAC4 |
| 5291 | TKCI | TRUCK-COURIER INC | | | SCAC4 |
| 5292 | TKCP | TANKCON FRP INC | | | SCAC4 |
| 5293 | TKCR | T K C TRANSPORT | | | SCAC4 |
| 5294 | TKCS | Tiszakécske | | H | TRAFFIC |
| 5295 | TKCT | THIESSEN LIVESTOCK | | | SCAC4 |
| 5296 | TKCU | CONSERT S.R.L. | | I | BIC |
| 5297 | TKCU | ABS PACIFIC | | | PWRC |
| 5298 | TKCU | ABS Pacific (Concert) | | | RSRV |
| 5299 | TKCU | CONSERT S R L | | | SCAC4 |
| 5300 | TKCX | The Koster Co. | 8/1920 | | NAKINA |
