| Place | Postal Code |
|---|---|
| Cha Sot, Naxai-gnai | 14000 |
| Chan Neua, Naxai-gnai | 14000 |
| Chane Vong, Naxai-gnai | 14000 |
| Chongnhai, Naxai-gnai | 14000 |
| Chongnoi, Naxai-gnai | 14000 |
| Done Khao, Naxai-gnai | 14000 |
| Dongko Kang, Naxai-gnai | 14000 |
| Dongko Tai, Naxai-gnai | 14000 |
| Keng Ka Vao, Naxai-gnai | 14000 |
| Kok Por, Naxai-gnai | 14000 |
| La Vi Mai, Naxai-gnai | 14000 |
| Leua Thon, Naxai-gnai | 14000 |
| Leuan Bok, Naxai-gnai | 14000 |
| Nasaikokpao, Naxai-gnai | 14000 |
| Nasainhai, Naxai-gnai | 14000 |
| Nasainoi, Naxai-gnai | 14000 |
| Nong Sa No, Naxai-gnai | 14000 |
| Pak Leng, Naxai-gnai | 14000 |
| Phon Thong, Naxai-gnai | 14000 |
| Sapon, Naxai-gnai | 14000 |
| Sene Sam Phanh, Naxai-gnai | 14000 |
| Song Ka Long, Naxai-gnai | 14000 |
| Thong Pa Pok Nai, Naxai-gnai | 14000 |
| Thong Pa Pok Nok, Naxai-gnai | 14000 |