| 1 | TB | Shuttle Inc. d/b/a USAir Shuttle | ICAO: USS, Callsign: US Shuttle, Designator TB recalled by IATA | USA | AVCODES |
| 2 | TB | Transair Sweden AB | Merged into SAS during 1981. Formed as Nordisk Aerotransport AB in 1950. | S | AVCODES |
| 3 | TB | TUI Airlines Belgium S.A/N.V. | ICAO: TUB, Callsign: Beauty, Name changed to N.V. Jetair t/a Jetairfly.com | B | AVCODES |
| 4 | TB | N.V. Jetair | ICAO: TUB, Callsign: Beauty, ICAO code changed to JAF w.e.f. 31 October 2006. Name changed from TUI Airlines Belgium | B | AVCODES |
| 5 | TB | TUI Airlines Belgium S.A/N.V. t/a Jetairfly | ICAO: JAF, Callsign: Beauty, Name changed to TUI Airlines Belgium NV t/a TUI fly Belgium w.e.f. 19 October 2016. Name changed from TUI Airlines Belgium. ICAO code changed from TUB w.e.f. 31 October 2006. | B | AVCODES |
| 6 | TB | Tara Air Pvt. Ltd | Callsign: Tara Air, | NEP | AVCODES |
| 7 | TB | Air Tara Limited | ICAO: AGP, Callsign: Air Tara, Name changed to GPA Group Plc. Founded on 28 February 1977. | IRL | AVCODES |
| 8 | TB | TUI Airlines Belgium NV t/a TUI fly Belgium | ICAO: JAF, Callsign: Beauty, Name changed from TUI Airlines Belgium t/a Jetairfly w.e.f. 19 October 2016. Name changed from TUI Airlines Belgium. ICAO code changed from TUB w.e.f. 31 October 2006. | B | AVCODES |
| 9 | TB | Twin Branch R.R. Co. | 1/1975; eliminated 7/1978 | | NAKINA |
| 10 | TB | Twin Branch R.R. Co. | 1/75; eliminated 7/78 | | NRHS |
| 11 | TB | TWIN BRANCH RAILROAD CO. | | | PWRC |
| 12 | TB | Trogenerbahn | | CH | TRAFFIC |
| 13 | TBA | Transbrasil S.A. Linhas Aereas | IATA: TR, Callsign: Transbrasil, IATA Prefix: 653, Suspended Operations on 03 December 2001. ICAO callsign changed from Tango Romeo | BR | AVCODES |
| 14 | TBA | Transbrasil S.A. Linhas Aereas | IATA: TR, Callsign: Tango Romeo, Suspended Operations on 03 December 2001. ICAO callsign changed to Transbrasil | BR | AVCODES |
| 15 | TBA | Tibet Airlines Corporation Limited | IATA: TV, Callsign: Tibet, | PRC | AVCODES |
| 16 | TBA | Transbrasil | IATA: TR | | ICAO1 |
| 17 | TBA | Trenes de Buenos Aires | | RA | TRAFFIC |
| 18 | TBAB | TRANSBULK A B | | | SCAC3 |
| 19 | TBAC | TRANSBORDER AIR CARGO INC | | | SCAC4 |
| 20 | TBAG | TBA INC | | | SCAC4 |
| 21 | TBAI | TOBAR INC | | | SCAC3 |
| 22 | TBAJ | TRANSPORTES DEL BAJIO ZAVALA | | | SCAC4 |
| 23 | TBAL | TRANSBALCO S A DE C V | | | SCAC4 |
| 24 | TBAN | TURBAN TRANSPORTATION INC | | | SCAC4 |
| 25 | TBAO | TUBARAO BULK CARRIERS INC NEW YORK | | | SCAC3 |
| 26 | TBAO | T & B TRASNPORTATION INC | | | SCAC4 |
| 27 | TBAP | T B & P EXPRESS INC | | | SCAC3 |
| 28 | TBAR | TRANSPORTES BENJAMIN ARAGON RENDON | | | SCAC4 |
| 29 | TBAS | TB & S CARTAGE | | | SCAC3 |
| 30 | TBAS | TRANSPORTES BARRERA | | | SCAC4 |
| 31 | TBAT | THIBAULT & ASSOCIATES | | | SCAC4 |
| 32 | TBAX | Toronto Pipe Line Co. | 1/1950-10/1957; eliminated 4/1960 | | NAKINA |
| 33 | TBAX | Canadian General Transit Co., Ltd. | added 4/1960; 4/1961 (not listed); eliminated 4/1961 | | NAKINA |
| 34 | TBAX | Toronto Pipe Line Co. | 1/52-10/57 | | NRHS |
| 35 | TBAX | Canadian General Transit Co., Ltd. | 4/61; eliminated 4/61 | | NRHS |
| 36 | TBAX | CANADIAN GENERAL TRANSIT CO., LTD. [TORONTO PIPE LINE CO.] | | | PWRC |
| 37 | TBAY | TRANS-BAY TRUCKING | | | SCAC3 |
| 38 | TBAY | TRANS-BAY TRUCKING | | | SCAC4 |
| 39 | TBB | Air Iberia | Callsign: Iberline, | GE | AVCODES |
| 40 | TBB | TAYLOR & BREWER | | | PWRC |
| 41 | TBB | TROBECS BUS SERVICE INC | | | SCAC4 |
| 42 | TBBB | THREE B TRUCKING CO (3 B TRUCKING C | | | SCAC3 |
| 43 | TBBB | TRANSPORTES RIOS SABINAS SA DE CV | | | SCAC4 |
| 44 | TBBD | T B BULLDOZING INC | | | SCAC4 |
| 45 | TBBK | TEN BERGE BROKERS INC | | | SCAC4 |
| 46 | TBBL | TRIBBLE, CALVIN TRUCKING | | | SCAC3 |
| 47 | TBBL | TRANSPORTES ESTEBAN SA DE CV | | | SCAC4 |
| 48 | TBBN | TRANSPORTES BAM BAN | | | SCAC4 |
| 49 | TBBO | TRANSPORT BESSETTE & BOUDREAU | | | SCAC4 |
| 50 | TBBQ | TRANSPORT BERNARD BOUSQUET INC | | | SCAC4 |
| 51 | TBBS | TIBBS, RICH | | | SCAC3 |
| 52 | TBBS | TRANSPORTES BARBOSA | | | SCAC4 |
| 53 | TBBT | TIBBETT, R E TRUCKING INC | | | SCAC3 |
| 54 | TBBU | CHINA RAILWAY TIELONG CONTAINER LOG CORP LTD | | PRC | BIC |
| 55 | TBBU | CHINA RAILWAY TIELONG CONTAINER LOG | | | SCAC4 |
| 56 | TBBV | TRANSBULK B V | | | SCAC3 |
| 57 | TBBW | TERAS BBC CHARTERING LLC | | | SCAC4 |
| 58 | TBBX | The Beaver Board Cos. | 7/1923 | | NAKINA |
| 59 | TBBX | BEAVER BOARD CO. | | | PWRC |
| 60 | TBC | Transportes ABC, S.A. de C.V. | Callsign: Trans-ABC, | MEX | AVCODES |
| 61 | TBC | Turbine Air Cargo UK Ltd. | Callsign: Blade, | GB | AVCODES |
| 62 | TBC | Tbilisi Airways Ltd. | IATA: TD, Callsign: Tbilisi, | GE | AVCODES |
| 63 | TBC | Turbine Air Cargo UK | | | ICAO1 |
| 64 | TBCA | TRIBECA TRANSPORTATION GROUP INC | | | SCAC3 |
| 65 | TBCA | TRANSPORTES SERVIN DE BAJA CALIFORN | | | SCAC4 |
| 66 | TBCC | TIRE & BATTERY CORP. | | | PWRC |
| 67 | TBCE | TRANSPORT BAIE-COMEAU INC | | | SCAC4 |
| 68 | TBCF | TRIBULLA CUSTOM FARMING | | | SCAC3 |
| 69 | TBCH | TASHA BLUE COACH LTD | | | SCAC3 |
| 70 | TBCI | TOBACCO CONTRACTORS INC | | | SCAC3 |
| 71 | TBCI | TCI LOGISTICS INC | | | SCAC4 |
| 72 | TBCJ | T B C TOURS | | | SCAC3 |
| 73 | TBCJ | THREE B TRUCKING LLC | | | SCAC4 |
| 74 | TBCK | TBC TRUCKING CORP | | | SCAC4 |
| 75 | TBCK | Tokyo Bay City Kotsu | City: Urayasu | J | TRAFFIC |
| 76 | TBCM | TRUALL BUILDING COMPONENTS INC | | | SCAC4 |
| 77 | TBCN | TER A BEE CORPORATION, THE | | | SCAC3 |
| 78 | TBCO | TEBCO TRUCKING | | | SCAC3 |
| 79 | TBCP | TRUE BLUE CORP | | | SCAC3 |
| 80 | TBCP | TRANSPORTES LUBAR | | | SCAC4 |
| 81 | TBCQ | TRINITY BULK CARRIERS AS OSLO NORWA | | | SCAC3 |
| 82 | TBCQ | TRANSPORT B CRAM | | | SCAC4 |
| 83 | TBCR | T B T CHARTER | | | SCAC3 |
| 84 | TBCR | TRIBUNE LLC | | | SCAC4 |
| 85 | TBCS | TRANS-BORDER CUSTOMS SERVICES INC | | | SCAC3 |
| 86 | TBCS | TURBOCRISTAL INC | | | SCAC4 |
| 87 | TBCT | TOWN BUSINESS CENTER | | | SCAC4 |
| 88 | TBCU | (TBCX) BOEING COMPANY | | | PWRC |
| 89 | TBCU | The Boeing Company | | | RSRV |
| 90 | TBCU | THE BOEING COMPANY | | | SCAC3 |
| 91 | TBCU | THE BOEING COMPANY | | | SCAC4 |
| 92 | TBCV | T B C HOLDINGS LTD | | | SCAC4 |
| 93 | TBCW | TRANSGLOBAL CARGO CARE INC | | | SCAC4 |
| 94 | TBCX | The Boeing Co. | added 1/1968; 4/1970-7/2005 | | NAKINA |
| 95 | TBCX | The Boeing Co. | added 1/68; 4/70-7/2000 | | NRHS |
| 96 | TBCX | BOEING COMPANY | | | PWRC |
| 97 | TBCX | The Boeing Company | | | RSRV |
| 98 | TBCX | BOEING COMPANY | | | SCAC4 |
| 99 | TBCY | TRAILER BRIDGE COMPANY INC. | | | SCAC3 |
| 100 | TBD | Thunderbird Tours | Callsign: Orca, | CDN | AVCODES |
