| Flag | Code | Country | Time Difference (GMT) | Group | Comment | Internet Code |
 | 1284 | BRITISH VIRGIN ISLANDS | -4 | BRD | Also known as TORTOLA | vg |
 | 886 | TAIWAN | 8 | | was Formosa | tw |
 | 992 | TAJIKSTAN (Republic of) | 5 | | Formally part of USSR | tj |
 | 255 | TANZANIA (United Republic of) | 3 | BCW | | tz |
 | 88213 | Telespazio S.p.A. | | GLOBAL | | |
 | 66 | THAILAND | 7 | | | th |
 | 389 | The Former Yugoslac Republic of MACEDONIA | 1 | EUC | | mk |
| 88216 | Thuraya | | GLOBAL | | |
 | 1670 | Tinian | 10 | CNMI | NORTHERN MARIANA ISLANDS (CNMI) | mp |
 | 228 | TOGO | 0 | | | tg |
 | 690 | TOKELAU | -11 | | | tk |
 | 676 | TONGA (Kingdom of) | 13 | BCW | | to |
 | 1868 | TRINIDAD AND TOBAGO | -4 | BCW | | tt |
 | 290 | TRISTAN DA CUNHA | 0 | BRD | | |
 | 216 | TUNISIA | 1 | | | tn |
 | 90 | TURKEY | 2 | EUC, NATO | | tr |
 | 993 | TURKMENISTAN | 5 | | Formally part of USSR | tm |
 | 1649 | TURKS AND CAICOS ISLANDS | -5 | BRD | | tc |
 | 688 | TUVALU | 12 | BCW | | tv |