| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Akpa 1, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Akpa 11, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Akpa 1V, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Amaiyi, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Amankwu 1, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Amankwu 11, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Amaugha, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Okpalaukwu, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Umuaja, Oso-Akwa | 453116 |
| Postal/ZIP Codes in Umuokerete, Oso-Akwa | 453116 |