| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Bo Tai, Ou-nua | 02000 |
| Postal/ZIP Codes in Boxao, Ou-nua | 02000 |
| Postal/ZIP Codes in Houaype Neua, Ou-nua | 02000 |
| Postal/ZIP Codes in Houaype Tai, Ou-nua | 02000 |
| Postal/ZIP Codes in Nahok, Ou-nua | 02000 |
| Postal/ZIP Codes in Souayngam, Ou-nua | 02000 |