| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Amabiriba, Okpanku | 402143 |
| Postal/ZIP Codes in Amaete, Okpanku | 402143 |
| Postal/ZIP Codes in Amagu, Okpanku | 402143 |
| Postal/ZIP Codes in Amaogudu, Okpanku | 402143 |
| Postal/ZIP Codes in Ihuezeoke, Okpanku | 402143 |
| Postal/ZIP Codes in Ihuibe, Okpanku | 402143 |
| Postal/ZIP Codes in Okpu, Okpanku | 402143 |