| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Agu Orba, Orba | 412110 |
| Postal/ZIP Codes in Ajuona, Orba | 412110 |
| Postal/ZIP Codes in Amalla, Orba | 412110 |
| Postal/ZIP Codes in Amaoba, Orba | 412110 |
| Postal/ZIP Codes in Oham, Orba | 412110 |
| Postal/ZIP Codes in Ohebe-Orba, Orba | 412110 |
| Postal/ZIP Codes in Owerri Amagu, Orba | 412110 |
| Postal/ZIP Codes in Owerri-Ezeorba, Orba | 412110 |
| Postal/ZIP Codes in Owerri-Okpu, Orba | 412110 |
| Postal/ZIP Codes in Umu-Ugwu, Orba | 412110 |
| Postal/ZIP Codes in Umunkpume, Orba | 412110 |