| Place | Post Code |
|---|---|
| Dong, Thaviengxai | 18000 |
| Nahong, Thaviengxai | 18000 |
| Naxai, Thaviengxai | 18000 |
| Naxong, Thaviengxai | 18000 |
| Phongneng Or Nampang, Thaviengxai | 18000 |
| Pou, Thaviengxai | 18000 |
| Viangleng, Thaviengxai | 18000 |
| Viengkham, Thaviengxai | 18000 |
| Viengthong, Thaviengxai | 18000 |
| Xiengkhong, Thaviengxai | 18000 |
| All postal codes in Thathom | |
|---|---|
| Gnamchaleunxai, Thathom | |
| Pakgnong, Thathom | |
| Thaviengxai, Thathom | |
| Thetsaban, Thathom | |