| 1 | 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 |
| 2 | TBA | Transbrasil S.A. Linhas Aereas | IATA: TR, Callsign: Tango Romeo, Suspended Operations on 03 December 2001. ICAO callsign changed to Transbrasil | BR | AVCODES |
| 3 | TBA | Tibet Airlines Corporation Limited | IATA: TV, Callsign: Tibet, | PRC | AVCODES |
| 4 | TBA | Transbrasil | IATA: TR | | ICAO1 |
| 5 | TBA | Trenes de Buenos Aires | | RA | TRAFFIC |
| 6 | TBAB | TRANSBULK A B | | | SCAC3 |
| 7 | TBAC | TRANSBORDER AIR CARGO INC | | | SCAC4 |
| 8 | TBAG | TBA INC | | | SCAC4 |
| 9 | TBAI | TOBAR INC | | | SCAC3 |
| 10 | TBAJ | TRANSPORTES DEL BAJIO ZAVALA | | | SCAC4 |
| 11 | TBAL | TRANSBALCO S A DE C V | | | SCAC4 |
| 12 | TBAN | TURBAN TRANSPORTATION INC | | | SCAC4 |
| 13 | TBAO | TUBARAO BULK CARRIERS INC NEW YORK | | | SCAC3 |
| 14 | TBAO | T & B TRASNPORTATION INC | | | SCAC4 |
| 15 | TBAP | T B & P EXPRESS INC | | | SCAC3 |
| 16 | TBAR | TRANSPORTES BENJAMIN ARAGON RENDON | | | SCAC4 |
| 17 | TBAS | TB & S CARTAGE | | | SCAC3 |
| 18 | TBAS | TRANSPORTES BARRERA | | | SCAC4 |
| 19 | TBAT | THIBAULT & ASSOCIATES | | | SCAC4 |
| 20 | TBAX | Toronto Pipe Line Co. | 1/1950-10/1957; eliminated 4/1960 | | NAKINA |
| 21 | TBAX | Canadian General Transit Co., Ltd. | added 4/1960; 4/1961 (not listed); eliminated 4/1961 | | NAKINA |
| 22 | TBAX | Toronto Pipe Line Co. | 1/52-10/57 | | NRHS |
| 23 | TBAX | Canadian General Transit Co., Ltd. | 4/61; eliminated 4/61 | | NRHS |
| 24 | TBAX | CANADIAN GENERAL TRANSIT CO., LTD. [TORONTO PIPE LINE CO.] | | | PWRC |
| 25 | TBAY | TRANS-BAY TRUCKING | | | SCAC3 |
| 26 | TBAY | TRANS-BAY TRUCKING | | | SCAC4 |
