| Place | Postal Code |
|---|---|
| Dongnaxok Neua, Sikhai | 01010 |
| Gnapha, Sikhai | 01010 |
| Meuang Va Tha, Sikhai | 01010 |
| Meuang Va Thong, Sikhai | 01010 |
| Nahe, Sikhai | 01010 |
| Phosi, Sikhai | 01010 |
| Sibounheuang Tha, Sikhai | 01010 |
| Sibounheuang Thong, Sikhai | 01010 |
| Sikhaitha, Sikhai | 01010 |
| Sikhaithong Neua, Sikhai | 01010 |
| Sikhaithong Tai, Sikhai | 01010 |
| Viengsavane, Sikhai | 01010 |