Oka → District → Nigeria Postal Codes
Ndiama
| State | Imo |
| Local Government Area | Isiala Mbano |
| District/Area | Oka |
| Zip/Postal Code | 471114 |
Ndibinuhu
| State | Imo |
| Local Government Area | Isiala Mbano |
| District/Area | Oka |
| Zip/Postal Code | 471114 |
Ndikpa
| State | Imo |
| Local Government Area | Isiala Mbano |
| District/Area | Oka |
| Zip/Postal Code | 471114 |
Umuduru-Ire
| State | Imo |
| Local Government Area | Isiala Mbano |
| District/Area | Oka |
| Zip/Postal Code | 471114 |
Umunoha
| State | Imo |
| Local Government Area | Isiala Mbano |
| District/Area | Oka |
| Zip/Postal Code | 471114 |
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