| Place | Post Code |
|---|---|
| Houaygnao, Phonxai | 04000 |
| Houayla, Phonxai | 04000 |
| Houaysou, Phonxai | 04000 |
| Loungmieng, Phonxai | 04000 |
| Phonxai, Phonxai | 04000 |
| Samakkhixai, Phonxai | 04000 |
| Tanongpo, Phonxai | 04000 |
| All postal codes in La | |
|---|---|
| Ano, La | |
| Chakple, La | |
| Donsa-at, La | |
| Houayphae, La | |
| Phonxai, La | |
| Phouthaen, La | |
| Tatmouan, La | |