Area Codes in Sońsk
| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|---|---|---|---|---|
| 23 | Ciechanów | Masovian Voivodeship | 46,438 | Poland | Europe/Warsaw |
Nearby Cities
| City | Region | Country | Population | Area Codes | Postal Codes |
|---|---|---|---|---|---|
| Adamowo, Gmina Nowe Miasto | Masovian Voivodeship | Poland | 2,000 | 23 | 09-120 |
| Ciechanów | Masovian Voivodeship | Poland | 46,438 | 23 | 06-401, 06-402, 06-409, 06-410 |
| Gaj, Pułtusk County | Masovian Voivodeship | Poland | — | 52 | — |
| Gąsocin | Masovian Voivodeship | Poland | 1,238 | 23 | 06-440 |
| Kołaczków | Masovian Voivodeship | Poland | 495 | 23 | — |