| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Anieze, Okpai | 322127 |
| Postal/ZIP Codes in Ashaka-Okpai, Okpai | 322127 |
| Postal/ZIP Codes in Ibusa, Okpai | 322127 |
| Postal/ZIP Codes in Obi-Ekuku, Okpai | 322127 |
| Postal/ZIP Codes in Obi-Usuani, Okpai | 322127 |
| Postal/ZIP Codes in Obodoyibo, Okpai | 322127 |
| Postal/ZIP Codes in Okpai-Obeze, Okpai | 322127 |
| Postal/ZIP Codes in Okpai-Oluchi, Okpai | 322127 |
| Postal/ZIP Codes in Umuagulu, Okpai | 322127 |
| Postal/ZIP Codes in Umuedem, Okpai | 322127 |
| Postal/ZIP Codes in Umugbome, Okpai | 322127 |