| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Ika Oku, Oku | 520109 |
| Postal/ZIP Codes in Ikot Abiyak, Oku | 520109 |
| Postal/ZIP Codes in Ikot Adakpan, Oku | 520109 |
| Postal/ZIP Codes in Ikot Antuen, Oku | 520109 |
| Postal/ZIP Codes in Ikot Eka Iko, Oku | 520109 |
| Postal/ZIP Codes in Ikot Esia, Oku | 520109 |
| Postal/ZIP Codes in Ikot Essien, Oku | 520109 |
| Postal/ZIP Codes in Ikot Ntu Oku, Oku | 520109 |
| Postal/ZIP Codes in Settlements, Oku | 520109 |