| Place | Post Code |
|---|---|
| Chom, Chiengchai | 03000 |
| Donpoy, Chiengchai | 03000 |
| Houakhoua, Chiengchai | 03000 |
| Houaylong Kao, Chiengchai | 03000 |
| Houaylong Mai, Chiengchai | 03000 |
| Sop I, Chiengchai | 03000 |
| Xienggneun, Chiengchai | 03000 |
| Xiengmoun, Chiengchai | 03000 |
| All postal codes in Sing | |
|---|---|
| Chiengchai, Sing | |
| Khoang, Sing | |
| Mom, Sing | |
| Nakham, Sing | |
| Namkeolouang, Sing | |
| Oudomsin, Sing | |
| Tapao - Donpoy, Sing | |
| Thongmai, Sing | |
| Xiengkhaeng, Sing | |