| Place | Post Code |
|---|---|
| Chongka, Oudomsin | 03000 |
| Donchai, Oudomsin | 03000 |
| Houaydam, Oudomsin | 03000 |
| Lakkham Mai, Oudomsin | 03000 |
| Namdek Loug, Oudomsin | 03000 |
| Namdet Mai, Oudomsin | 03000 |
| Nammai, Oudomsin | 03000 |
| Oudomsin, Oudomsin | 03000 |
| Pakha, Oudomsin | 03000 |
| Phagnalouang, Oudomsin | 03000 |
| Poungkok, Oudomsin | 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 | |