| Place | Post Code |
|---|---|
| Abana, Umon | 542108 |
| Akpasip, Umon | 542108 |
| Aniyem, Umon | 542108 |
| Ayaba Oji, Umon | 542108 |
| Bechei, Umon | 542108 |
| Berekpe, Umon | 542108 |
| Biekpe, Umon | 542108 |
| Bikekpe, Umon | 542108 |
| Ekot Ewo, Umon | 542108 |
| Idung Itu, Umon | 542108 |
| Ikot Abasi, Umon | 542108 |
| Ikot Obisame, Umon | 542108 |
| Ikot Oboaama, Umon | 542108 |
| Ikot Ogbandem, Umon | 542108 |
| Ikot Ogun, Umon | 542108 |
| Ikot Okpora, Umon | 542108 |
| Ikot Utun, Umon | 542108 |
| Inu-ranu, Umon | 542108 |
| Utumua, Umon | 542108 |