| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Ndiama, Oka | 471114 |
| Postal/ZIP Codes in Ndibinuhu, Oka | 471114 |
| Postal/ZIP Codes in Ndikpa, Oka | 471114 |
| Postal/ZIP Codes in Ndiowerre, Oka | 471114 |
| Postal/ZIP Codes in Okpala, Oka | 471114 |
| Postal/ZIP Codes in Umudike, Oka | 471114 |
| Postal/ZIP Codes in Umuduru-Ire, Oka | 471114 |
| Postal/ZIP Codes in Umuezeala, Oka | 471114 |
| Postal/ZIP Codes in Umunoha, Oka | 471114 |