| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Abuator, Onyah | 322129 |
| Postal/ZIP Codes in Eke-Okpokri, Onyah | 322129 |
| Postal/ZIP Codes in Obieki, Onyah | 322129 |
| Postal/ZIP Codes in Onyah, Onyah | 322129 |
| Postal/ZIP Codes in Osekwenike, Onyah | 322129 |
| Postal/ZIP Codes in Osifo, Onyah | 322129 |
| Postal/ZIP Codes in Oworobia, Onyah | 322129 |
| Postal/ZIP Codes in Utu-Okwume, Onyah | 322129 |