| Place | Post Code |
|---|---|
| Don Mai, Thongmai | 03000 |
| Houaykhen, Thongmai | 03000 |
| Houaykot, Thongmai | 03000 |
| Namchay, Thongmai | 03000 |
| Pawai Kao, Thongmai | 03000 |
| Pawai Tai, Thongmai | 03000 |
| Phiyeu, Thongmai | 03000 |
| Siheuang, Thongmai | 03000 |
| Thong Mai, Thongmai | 03000 |
| Thonggnon, Thongmai | 03000 |
| Xieng In, Thongmai | 03000 |
| Yangphieng, Thongmai | 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 | |