| Prefisso▲ | Città↕ | Regione amministrativa↕ | Popolazione della città↕ | Paese/Regione | Fuso orario |
|---|
| 1800 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 1900 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 3 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 635 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 644 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 645 | Ang Mo Kio New Town | Distretto Nordorientale (Singapore) | — | Singapore | Asia/Singapore |
| 653 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 673 | Geylang | — | — | Singapore | Asia/Singapore |
| 675 | Bukit Sembawang Estate | — | — | Singapore | Asia/Singapore |
| 676 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 677 | Tampines New Town | — | — | Singapore | Asia/Singapore |
| 678 | Tampines New Town | — | — | Singapore | Asia/Singapore |
| 8 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 800 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 9 | — | — | 4,701,069 | Singapore | Asia/Singapore |