| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 6 | Pematangsiantar | North Sumatra | 209,614 | Indonesia | Asia/Jakarta |
| 627 | Subulussalam | Aceh | — | Indonesia | Asia/Jakarta |
| 642 | Blangkejeren | Aceh | — | Indonesia | Asia/Jakarta |
| 644 | Samalanga | Aceh | — | Indonesia | Asia/Jakarta |
| 645 | Lhokseumawe | Aceh | 88,974 | Indonesia | Asia/Jakarta |
| 651 | Banda Aceh | Aceh | 250,757 | Indonesia | Asia/Jakarta |
| 652 | Sabang, Indonesia | Aceh | 24,519 | Indonesia | Asia/Jakarta |
| 653 | Pidie Regency | Aceh | — | Indonesia | Asia/Jakarta |
| 654 | Calang | Aceh | — | Indonesia | Asia/Pontianak |
| 658 | Singkil, Indonesia | Aceh | 46,800 | Indonesia | Asia/Jakarta |