| 9401 | TSVX | *TRANSERV SYSTEMS, INC. | | | PWRC |
| 9402 | TSVX | +TENNSV, INC. | | | PWRC |
| 9403 | TSVX | Tennsv | | | RSRV |
| 9404 | TSVX | TENNSV, INC. | | | SCAC4 |
| 9405 | TSVY | TRUSERV LOGISTICS COMPANY | | | SCAC4 |
| 9406 | TSW | TEA Basel AG | IATA: BH, Callsign: Topswiss, Name changed to Easyjet Switzerland / ICAO designator changed to EZS. | CH | AVCODES |
| 9407 | TSW | Transwings Ltd. | Callsign: Swisstrans, | CH | AVCODES |
| 9408 | TSW | TEA Switzerland AG | IATA: BH, Callsign: Topswiss, Name Changed to TEA Basle. Established on 18 May 1988. Commenced operations on 23 March 1989. | CH | AVCODES |
| 9409 | TSW | Transwings | | | ICAO1 |
| 9410 | TSWB | TURMEL SERVICE DE PNEUS TWO ZERO ZE | | | SCAC4 |
| 9411 | TSWC | TRADESHOW CARRIERS, INC | | | SCAC1 |
| 9412 | TSWE | T S EXPRESS | | | SCAC4 |
| 9413 | TSWF | TSF | | | SCAC4 |
| 9414 | TSWG | TRANSFER SYSTEMS & WAREHOUSING | | | SCAC4 |
| 9415 | TSWH | THOMAS, W H OIL CO INC | | | SCAC4 |
| 9416 | TSWJ | TRI STATE TIMER LLC | | | SCAC4 |
| 9417 | TSWL | THOM SAWYER LOGISTICS SOLUTIONS INC | | | SCAC4 |
| 9418 | TSWN | TEXAS STAR WAREHOUSE & DISTRIBUTION | | | SCAC4 |
| 9419 | TSWP | TRANS-WORLD SHIPPING, APS | | | SCAC4 |
| 9420 | TSWQ | TRI-STATE WAREHOUSE INC | | | SCAC4 |
| 9421 | TSWR | Toppenish, Simcoe & Western R.R. | added 10/1993; 1/1994; eliminated 4/1995; 7/2000-7/2005 | | NAKINA |
| 9422 | TSWR | Toppenish, Simcoe & Western R.R. | added 10/93; 1/94; eliminated 4/95; 7/2000 | | NRHS |
| 9423 | TSWR | TOPPENISH, SIMCOE & WESTERN RAILROAD | | | PWRC |
| 9424 | TSWR | Toppenish Simcoe and Western Railroad | | | RSRV |
| 9425 | TSWT | TRANSTEWART TRUCKING INC | | | SCAC4 |
| 9426 | TSWV | TRI-STATE PETROLEUM CORP | | | SCAC4 |
| 9427 | TSWW | T & S TRUCKING | | | SCAC4 |
| 9428 | TSX | Trans-Asia | Callsign: Trans-Asia, | KZ | AVCODES |
| 9429 | TSX | Thai Star Airlines | IATA: T9, Callsign: Thai Star, | T | AVCODES |
| 9430 | TSX | Thai Star Airlines | IATA: T9 | | ICAO1 |
| 9431 | TSX | Tank Specializing Co. | 4/1947-4/1961 (not listed) | | NAKINA |
| 9432 | TSX | Tank Specializing Co. | 1/52-4/61 | | NRHS |
| 9433 | TSX | TANK SPECIALIZING CO. | | | PWRC |
| 9434 | TSXD | TRANSPORTES SENTRI EXPRESS S DE RL | | | SCAC4 |
| 9435 | TSXF | TRANSPORTES REFRIGERADOS SAN CARLOS | | | SCAC4 |
| 9436 | TSXG | TRIPLE S TRANSPORTATION INC | | | SCAC4 |
| 9437 | TSXH | TSX TRANSPORT INC | | | SCAC4 |
| 9438 | TSXK | T S TRANSIT LLC | | | SCAC4 |
| 9439 | TSXL | TRANSTAR EXPRESS LLC | | | SCAC4 |
| 9440 | TSXN | TSS TRANSPORT INC | | | SCAC4 |
| 9441 | TSXO | TRANSX LTD (INTERMODAL DIVISION) | | | SCAC4 |
| 9442 | TSXR | THREE S EXPRESS INC | | | SCAC4 |
| 9443 | TSXS | TST OLEX (DIVISION OF TST SOLUTIONS | | | SCAC4 |
| 9444 | TSXT | TWO SIX TWO EIGHT-SIX ZERO ONE THRE | | | SCAC4 |
| 9445 | TSXV | TRI-STONE TRANSPORTATION LLC | | | SCAC4 |
| 9446 | TSXW | TRI-STATE EXPRESS, INC | | | SCAC1 |
| 9447 | TSXX | Tri-State Generation & Transmission Association, Inc. | 1/1994 (not listed); added 1/1997; eliminated 10/1998; 7/2000-7/2005 (not listed) | | NAKINA |
| 9448 | TSXX | Tri-State Generation & Transmission Association, Inc. | 1/94; added 1/97; eliminated 10/98; 7/2000 | | NRHS |
| 9449 | TSXX | TRI-STATE GENERATION & TRANSMISSION ASSOCIATION, INC | | | PWRC |
| 9450 | TSXX | Tri-State Generation and Transmission Association | | | RSRV |
| 9451 | TSXX | TRI-STATE GENERATION & T | | | SCAC4 |
| 9452 | TSXZ | TRANSAMERICA LEASING INCORPORATED | | | PWRC |
| 9453 | TSXZ | TAL International | | | RSRV |
| 9454 | TSXZ | TRANSAMERICA LEASING INC | | | SCAC4 |
| 9455 | TSY | Tristar Air | Callsign: Triple Star, | ET | AVCODES |
| 9456 | TSY | Tristar Air | | | ICAO1 |
| 9457 | TSYA | TLC SYSTEMS | | | SCAC4 |
| 9458 | TSYD | TOOLPLAS SYSTEMS INC | | | SCAC4 |
| 9459 | TSYF | TRANSPORT SYLVESTER & FORGET INC | | | SCAC4 |
| 9460 | TSYH | TOTAL TRANSPORT SYSTEMS PVT LTD | | | SCAC4 |
| 9461 | TSYL | TRANSPORT SYLZA | | | SCAC4 |
| 9462 | TSYN | TRIOSYN RESEARCH INC | | | SCAC4 |
| 9463 | TSYO | TOMLINSON SYSTEMS INC | | | SCAC4 |
| 9464 | TSYQ | T SYSTEM 3 INC | | | SCAC4 |
| 9465 | TSYT | TRANSPORT SYSTEMS LLC | | | SCAC4 |
| 9466 | TSYU | {LLC "TS 94"};ZIPCODE=191186 | | RUS | BIC |
| 9467 | TSYW | TRANSONIC SYSTEMS INC | | | SCAC4 |
| 9468 | TSYY | TRANSPLACE SPECIALIZED SERVICES (CA | | | SCAC4 |
| 9469 | TSZ | Sky Handling LLC | | RUS | AVCODES |
| 9470 | TSZA | TRANSPORTES SALAZAR (MX-333486) | | | SCAC4 |
| 9471 | TSZCZ | Tramwaje Szczecińskie | City: Szczecin | PL | TRAFFIC |
| 9472 | TSZD | TRANSPORTADORA SILZA SA DE CV | | | SCAC4 |
| 9473 | TSZF | THREE SIX ZERO (360) FREIGHT SOLUTI | | | SCAC4 |
| 9474 | TSZG | TSE LOGISTICS LLC | | | SCAC4 |
| 9475 | TSZI | TRIPLE SHOT EXPRESS INC | | | SCAC4 |
| 9476 | TSZK | THREE SIX ZERO (360) TRUCKING LLC | | | SCAC4 |
| 9477 | TSZM | THREE SIX ZERO (360) | | | SCAC4 |
| 9478 | TSZN | TRANSPORTATION SERVICES INTERNATION | | | SCAC4 |
| 9479 | TSZR | TRANSPORTES SALAZAR (MX-329886) | | | SCAC4 |
| 9480 | TSZS | TWO SEVEN ONE SEVEN EIGHT EIGHT | | | SCAC4 |
| 9481 | TSZY | THREE SIX ZERO (360) TRANSPORTATION | | | SCAC4 |
| 9482 | TT | Air Lithuania | ICAO: KLA, Callsign: Kaunas, IATA Prefix: 843, | LT | AVCODES |
| 9483 | TT | Texas International Airways, Inc. | Callsign: Texas, | USA | AVCODES |
| 9484 | TT | Tiger Airways Australia Pty Ltd t/a Tigerair Australia | ICAO: TGG, Callsign: Tiggoz, Ceased operations on 25 March 2020. | AUS | AVCODES |
| 9485 | TT | Braathens International Airways AB | ICAO: BIX, Callsign: Sun Trip, | S | AVCODES |
| 9486 | TT | Toledo Terminal R.R. Co. | 8/1920-1/1980; eliminated 10/1984 | | NAKINA |
| 9487 | TT | Toledo Terminal R.R. Co. | 4/38-1/80; eliminated 10/84 | | NRHS |
| 9488 | TT | *TOLEDO TERMINAL RR | | | PWRC |
| 9489 | TT | *TOONERVILLE TROLLEY | | | PWRC |
| 9490 | TT | Toledo Terminal Railroad | | | RSRV |
| 9491 | TT | TT modell railway | | TOY | TRAFFIC |
| 9492 | TT | Trentino Trasporti | | IT | VKM |
| 9493 | TTA | Transportes E Trabalho Aero | Name changed to TTA - Empresa Nacional de Transporte e Trabalho A�reo | MOC | AVCODES |
| 9494 | TTA | TTA - Sociedade de Transporte e Trabalho Aereo | | | ICAO1 |
| 9495 | TTAC | TRANSPORTES A C | | | SCAC4 |
| 9496 | TTAD | TRANSPORTES ARANDAS | | | SCAC4 |
| 9497 | TTAF | TICO TRANSPORT | | | SCAC4 |
| 9498 | TTAG | T & T EVERGREEN | | | SCAC4 |
| 9499 | TTAH | TSP TRUCKING LLC | | | SCAC4 |
| 9500 | TTAJ | TRANSPORTES ANDRES JIMENEZ | | | SCAC4 |
