| Place | Post Code |
|---|---|
| Ikao, Ikao | 313108 |
| Ishiegbe, Ikao | 313108 |
| Oke-Esa, Ikao | 313108 |
| Urhuere, Ikao | 313108 |
| Utho, Ikao | 313108 |
| All postal codes in Owan East | |
|---|---|
| Emai, Owan East | |
| Igue, Owan East | |
| Ihievbe, Owan East | |
| Ikao, Owan East | |
| Ivbi-Mion, Owan East | |
| Ive-Ada-Obi, Owan East | |
| Otuo, Owan East | |
| Uokha, Owan East | |