| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Amizi, Oloko | 440111 |
| Postal/ZIP Codes in Awomukwu, Oloko | 440111 |
| Postal/ZIP Codes in Azuiyi, Oloko | 440111 |
| Postal/ZIP Codes in Iziugwu-Arizi, Oloko | 440111 |
| Postal/ZIP Codes in Nchara, Oloko | 440111 |
| Postal/ZIP Codes in Obohia-Okike, Oloko | 440111 |
| Postal/ZIP Codes in Oloko, Oloko | 440111 |
| Postal/ZIP Codes in Umugo, Oloko | 440111 |
| Postal/ZIP Codes in Usaka-Eleogu, Oloko | 440111 |