| Lieu | Code postal |
|---|---|
| Khanghai, Somboun | 09000 |
| Nakhue, Somboun | 09000 |
| Nammon, Somboun | 09000 |
| Namngam, Somboun | 09000 |
| Nong-On, Somboun | 09000 |
| Pha Neua, Somboun | 09000 |
| Pha Tai, Somboun | 09000 |
| Thoum, Somboun | 09000 |
| Codes postaux en Phaxay | |
|---|---|
| Kangsaen, Phaxay | |
| Namsiam, Phaxay | |
| Saen-oudom, Phaxay | |
| Somboun, Phaxay | |