| 1 | TAI | TACA International Airlines, S.A. | IATA: TA, Callsign: Taca, IATA Prefix: 202, Name changed to Avianca El Salvador on 21 May 2013. | ES | AVCODES |
| 2 | TAI | Avianca El Salvador | IATA: TA, Callsign: Taca, IATA Prefix: 202, Name changed from TACA International Airlines, S.A. | ES | AVCODES |
| 3 | TAI | Avianca Central America | IATA: TA, Callsign: Taca, IATA Prefix: 202, Name changed from Avianca El Salvador and previously TACA International Airlines, S.A. | ES | AVCODES |
| 4 | TAIA | TRANSPORT ASSISTANCE INC | | | SCAC3 |
| 5 | TAIB | TACOMA INDUSTRIES INC | | | SCAC3 |
| 6 | TAIB | TRANSPORT ONE | | | SCAC4 |
| 7 | TAICHUNGB | Taichung Bus | | RC | TRAFFIC |
| 8 | TAID | T A T INC | | | SCAC3 |
| 9 | TAIE | TRUCK AIR TRANSFER | | | SCAC3 |
| 10 | TAIF | TEAM AIR EXPRESS INC (AIR FREIGHT D | | | SCAC4 |
| 11 | TAIFUNG | Tai Fung Coach | | HK | TRAFFIC |
| 12 | TAIG | T & A TRUCKING | | | SCAC4 |
| 13 | TAIH | TRANSIT-ALL INC | | | SCAC3 |
| 14 | TAIHEIYO | Taiheiyo Coal | | J | TRAFFIC |
| 15 | TAII | T-A INTERSTATE TRUCKING INC | | | SCAC3 |
| 16 | TAIJ | T A T INC | | | SCAC3 |
| 17 | TAIJ | TAYLOR, PHILLIP J | | | SCAC4 |
| 18 | TAIKO | Taiko Bus | Subsidiary of the Odakyu Group | J | TRAFFIC |
| 19 | TAIN | TRANSIRE INC | | | SCAC3 |
| 20 | TAIN | TRANS-ATLANTIS INC | | | SCAC4 |
| 21 | TAIO | TRANS AIR INC | | | SCAC3 |
| 22 | TAIQ | TAITS CUSTOM TRAILERS | | | SCAC4 |
| 23 | TAIR | TRANS AIR | | | SCAC4 |
| 24 | TAIR | Transair Sweden | Real: TB | S | TRAFFIC |
| 25 | TAIS | TRANSPORTATION SERVICES | | | SCAC3 |
| 26 | TAIT | TAIT BROTHERS CONTRACTING LTD | | | SCAC4 |
| 27 | TAIU | STOLT TANK CONTAINERS LEASING LTD | | BM | BIC |
| 28 | TAIU | TABY AMERICA INC | | | SCAC4 |
| 29 | TAIV | TAIGA VENTURES | | | SCAC3 |
| 30 | TAIX | Texas Alkyls, Inc. | added 4/1990; eliminated 4/1991; 1/1994-7/2005 (not listed) | | NAKINA |
| 31 | TAIX | Texas Alkyls, Inc. | added 4/90; eliminated 4/91; 1/94-7/2000 | | NRHS |
| 32 | TAIX | TEXAS ALKYLS INC. | | | PWRC |
| 33 | TAIX | Texas Alkyls | | | RSRV |
| 34 | TAIYO | Taiyo Kotsu | | J | TRAFFIC |
| 35 | TAIZ | TOP AG, INC. | | | PWRC |
