| Place | Post Code |
|---|---|
| Bansan, Naxouang | 11000 |
| Hindam, Naxouang | 11000 |
| Hinngon, Naxouang | 11000 |
| Huaykhai, Naxouang | 11000 |
| Kokkieng, Naxouang | 11000 |
| Nadi, Naxouang | 11000 |
| Nakan, Naxouang | 11000 |
| Nasao, Naxouang | 11000 |
| Naxuang, Naxouang | 11000 |
| Nongpaat, Naxouang | 11000 |
| Phakhort, Naxouang | 11000 |
| Vanglene, Naxouang | 11000 |
| Xiengmaen, Naxouang | 11000 |
| All postal codes in Viengthong | |
|---|---|
| Chomthong, Viengthong | |
| Namuang, Viengthong | |
| Naxouang, Viengthong | |
| Phathong, Viengthong | |
| Thadua, Viengthong | |
| Thongmixai, Viengthong | |