| Place | Post Code |
|---|---|
| Adda, Obollo-Etti | 412109 |
| Ohule-Etiti, Obollo-Etti | 412109 |
| Umuesuogwu, Obollo-Etti | 412109 |
| Umuitedo, Obollo-Etti | 412109 |
| Umuoleh, Obollo-Etti | 412109 |
| Umuonyeku, Obollo-Etti | 412109 |
| Umuosigide, Obollo-Etti | 412109 |
| All postal codes in Udenu | |
|---|---|
| Amalla, Udenu | |
| Ezimo, Udenu | |
| Imilike, Udenu | |
| Obollo-Afor, Udenu | |
| Obollo-Eke, Udenu | |
| Obollo-Etti, Udenu | |
| Ogbodu-Aba, Udenu | |
| Orba, Udenu | |
| Udunedem, Udenu | |