| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Amokwe/Amorji, Amainyi | 472121 |
| Postal/ZIP Codes in Omulo, Amainyi | 472121 |
| Postal/ZIP Codes in Opara Amainyi, Amainyi | 472121 |
| Postal/ZIP Codes in Umuebeta, Amainyi | 472121 |
| Postal/ZIP Codes in Umunahihie, Amainyi | 472121 |
| Postal/ZIP Codes in Umuode, Amainyi | 472121 |