| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Amankpu, Mgbakwu | 420113 |
| Postal/ZIP Codes in Amanwanyi, Mgbakwu | 420113 |
| Postal/ZIP Codes in Amazike, Mgbakwu | 420113 |
| Postal/ZIP Codes in Amede, Mgbakwu | 420113 |
| Postal/ZIP Codes in Umuotulu, Mgbakwu | 420113 |
| Postal/ZIP Codes in Uruonwu, Mgbakwu | 420113 |