| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Kohay, Om | 18000 |
| Postal/ZIP Codes in Mouang Om, Om | 18000 |
| Postal/ZIP Codes in Nadi, Om | 18000 |
| Postal/ZIP Codes in Nameueung, Om | 18000 |
| Postal/ZIP Codes in Namla, Om | 18000 |
| Postal/ZIP Codes in Namxai, Om | 18000 |
| Postal/ZIP Codes in Phialuang, Om | 18000 |
| Postal/ZIP Codes in Thalo, Om | 18000 |