| Place | Post Code |
|---|---|
| Bok, Laonat - Houayxay | 13000 |
| Dongkouangtone, Laonat - Houayxay | 13000 |
| Dornkheng, Laonat - Houayxay | 13000 |
| Houaysay, Laonat - Houayxay | 13000 |
| Kadan, Laonat - Houayxay | 13000 |
| Khamsida, Laonat - Houayxay | 13000 |
| Khoklor, Laonat - Houayxay | 13000 |
| Laohouakham, Laonat - Houayxay | 13000 |
| Laomakkha, Laonat - Houayxay | 13000 |
| Laomat, Laonat - Houayxay | 13000 |
| Laopaxi, Laonat - Houayxay | 13000 |
| Maihouanamsang, Laonat - Houayxay | 13000 |
| Namakmi, Laonat - Houayxay | 13000 |
| Namkham, Laonat - Houayxay | 13000 |
| Nong-Ing, Laonat - Houayxay | 13000 |
| Noy, Laonat - Houayxay | 13000 |
| Phone, Laonat - Houayxay | 13000 |
| Sikhod, Laonat - Houayxay | 13000 |
| Tansoum, Laonat - Houayxay | 13000 |