| Place | Post Code |
|---|---|
| Bak, Phai | 13000 |
| Hommala, Phai | 13000 |
| Khamnoy, Phai | 13000 |
| Khaokat, Phai | 13000 |
| Lak 35, Phai | 13000 |
| Nasan, Phai | 13000 |
| Nateui Tai, Phai | 13000 |
| Nateuy Neua, Phai | 13000 |
| Nongboua, Phai | 13000 |
| Phay, Phai | 13000 |
| Pongsima, Phai | 13000 |
| Xiengbanh, Phai | 13000 |