| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Amorji, Onicha-Ukwuani | 322106 |
| Postal/ZIP Codes in Eweshi, Onicha-Ukwuani | 322106 |
| Postal/ZIP Codes in Ibabu, Onicha-Ukwuani | 322106 |
| Postal/ZIP Codes in Ike-Onicha, Onicha-Ukwuani | 322106 |
| Postal/ZIP Codes in Ugillami, Onicha-Ukwuani | 322106 |