| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Bak, Phai | 13000 |
| Postal/ZIP Codes in Hommala, Phai | 13000 |
| Postal/ZIP Codes in Khamnoy, Phai | 13000 |
| Postal/ZIP Codes in Khaokat, Phai | 13000 |
| Postal/ZIP Codes in Lak 35, Phai | 13000 |
| Postal/ZIP Codes in Nasan, Phai | 13000 |
| Postal/ZIP Codes in Nateui Tai, Phai | 13000 |
| Postal/ZIP Codes in Nateuy Neua, Phai | 13000 |
| Postal/ZIP Codes in Nongboua, Phai | 13000 |
| Postal/ZIP Codes in Phay, Phai | 13000 |
| Postal/ZIP Codes in Pongsima, Phai | 13000 |
| Postal/ZIP Codes in Xiengbanh, Phai | 13000 |