| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Akpununu, Onuaboh | 322131 |
| Postal/ZIP Codes in Obotu, Onuaboh | 322131 |
| Postal/ZIP Codes in Ogwashi, Onuaboh | 322131 |
| Postal/ZIP Codes in Onuaboh, Onuaboh | 322131 |
| Postal/ZIP Codes in Umuechi-Obiofu, Onuaboh | 322131 |
| Postal/ZIP Codes in Umuechi-Osuani, Onuaboh | 322131 |