| Place | Post Code |
|---|---|
| Bannong, Khonvat | 18000 |
| Donheua, Khonvat | 18000 |
| Huayxai, Khonvat | 18000 |
| Namyuak, Khonvat | 18000 |
| Phonegnang, Khonvat | 18000 |
| Phonemuang, Khonvat | 18000 |
| Phoukatha, Khonvat | 18000 |
| Samsao, Khonvat | 18000 |
| Thaheua, Khonvat | 18000 |
| Thamdin, Khonvat | 18000 |
| Vanggnom, Khonvat | 18000 |
| Xiengxae Or Xieng Nge, Khonvat | 18000 |
| All postal codes in Longchaeng | |
|---|---|
| Khonvat, Longchaeng | |
| Napho - Xiengmi, Longchaeng | |
| Phonsavat, Longchaeng | |