| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 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 | North East Community Development Council | — | Singapore | Asia/Singapore |
| 653 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 673 | Geylang | — | — | Singapore | Asia/Singapore |
| 675 | Sembawang Park | — | — | Singapore | Asia/Singapore |
| 676 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 677 | Tampines | — | — | Singapore | Asia/Singapore |
| 678 | Tampines | — | — | Singapore | Asia/Singapore |
| 8 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 800 | — | — | 4,701,069 | Singapore | Asia/Singapore |
| 9 | — | — | 4,701,069 | Singapore | Asia/Singapore |