| Place | Post Code |
|---|---|
| Ifuroka, Amalla | 412114 |
| Umu-Egari, Amalla | 412114 |
| Umunachi, Amalla | 412114 |
| 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 | |