| Area Code▲ | Lungsod↕ | Namamahalang Rehiyon↕ | Populasyon ng Siyudad↕ | Bansa/Rehiyon | Oras ng Dako |
|---|
| 20 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 21 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 22 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 23 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 24 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 25 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 26 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 27 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 28 | Nukualofa | Tongatapu | 22,400 | Tonga | Pacific/Tongatapu |
| 33 | Kolonga | Tongatapu | — | Tonga | Pacific/Tongatapu |
| 34 | Kolonga | Tongatapu | — | Tonga | Pacific/Tongatapu |
| 37 | Vaini | Tongatapu | 2,976 | Tonga | Pacific/Tongatapu |
| 38 | Vaini | Tongatapu | 2,976 | Tonga | Pacific/Tongatapu |