| Place | Post Code |
|---|---|
| Huamouang, Phachao | 10000 |
| Keosomphou, Phachao | 10000 |
| Naxou, Phachao | 10000 |
| Phonengam, Phachao | 10000 |
| Phonesida, Phachao | 10000 |
| All postal codes in Kasy | |
|---|---|
| Bouamphouk, Kasy | |
| Chieng, Kasy | |
| Namonmai, Kasy | |
| Phachao, Kasy | |
| Phoukham, Kasy | |
| Pounglak, Kasy | |