| Place | Post Code |
|---|---|
| Houayhaet, Sommon | 07000 |
| Houaypit, Sommon | 07000 |
| Naheua, Sommon | 07000 |
| Navieng, Sommon | 07000 |
| Nokkok, Sommon | 07000 |
| Pakhom, Sommon | 07000 |
| Phienggnam, Sommon | 07000 |
| Samkha, Sommon | 07000 |
| Sobpit, Sommon | 07000 |
| Ta-Onh Neua, Sommon | 07000 |
| Ta-Onh Tai, Sommon | 07000 |
| All postal codes in Xiengkhor | |
|---|---|
| Mouangnam, Xiengkhor | |
| Natong, Xiengkhor | |
| Phiangsa, Xiengkhor | |
| Sommon, Xiengkhor | |
| Sopxay, Xiengkhor | |
| Xiengkho, Xiengkhor | |