| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Afokolo, Idoa | 310104 |
| Postal/ZIP Codes in Atologa, Idoa | 310104 |
| Postal/ZIP Codes in Ebhoigbon, Idoa | 310104 |
| Postal/ZIP Codes in Iwere, Idoa | 310104 |
| Postal/ZIP Codes in Ofie, Idoa | 310104 |
| Postal/ZIP Codes in Otaika, Idoa | 310104 |
| Postal/ZIP Codes in Ubi, Idoa | 310104 |
| Postal/ZIP Codes in Urhobo-Alamu Camp, Idoa | 310104 |