| Place | Post Code |
|---|---|
| Dornkha, Hatkho | 06000 |
| Hatkhor, Hatkho | 06000 |
| Houaykha, Hatkho | 06000 |
| Houaykhor, Hatkho | 06000 |
| Houaylonay, Hatkho | 06000 |
| Houaylonok, Hatkho | 06000 |
| Latthahe, Hatkho | 06000 |
| Phatheung, Hatkho | 06000 |
| Thamloum, Hatkho | 06000 |
| All postal codes in Park Ou | |
|---|---|
| Hatkho, Park Ou | |
| Hatpang, Park Ou | |
| Houay-ot, Park Ou | |
| Nasavang, Park Ou | |
| Pak-Ou, Park Ou | |
| Pakchaek, Park Ou | |
| Phonsavang, Park Ou | |
| Somsanouk, Park Ou | |