| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 21 | Bekasi | West Java | 1,520,119 | Indonesia | Asia/Jakarta |
| 26 | Cianjur | West Java | — | Indonesia | Asia/Jakarta |
| 6 | Pematangsiantar | North Sumatra | 209,614 | Indonesia | Asia/Jakarta |
| 631 | Central Jakarta | Jakarta | — | Indonesia | Asia/Jakarta |