| Place | Post Code |
|---|---|
| Dongxiengdi, Sikeut | 01140 |
| Nalien, Sikeut | 01140 |
| Nasiao, Sikeut | 01140 |
| Phangheng, Sikeut | 01140 |
| Phonkeo, Sikeut | 01140 |
| Phonsawan, Sikeut | 01140 |
| Sikeut, Sikeut | 01140 |
| Xaimoungkhoun, Sikeut | 01140 |
| All postal codes in Naxaithong | |
|---|---|
| Ilai, Naxaithong | |
| Nakha, Naxaithong | |
| Namkiang, Naxaithong | |
| Naxaythong, Naxaithong | |
| Phonthong, Naxaithong | |
| Sikeut, Naxaithong | |