| Place | Post Code |
|---|---|
| Banhay, Phonsavat | 18000 |
| Dindeng-Thadindeng, Phonsavat | 18000 |
| Don Mai, Phonsavat | 18000 |
| Huaypoung, Phonsavat | 18000 |
| Khonvat, Phonsavat | 18000 |
| Nahan, Phonsavat | 18000 |
| Nam Khuye, Phonsavat | 18000 |
| Napho, Phonsavat | 18000 |
| Phonexai, Phonsavat | 18000 |
| Vangluang, Phonsavat | 18000 |
| Xamkhon, Phonsavat | 18000 |
| Xiengmi, Phonsavat | 18000 |
| All postal codes in Longchaeng | |
|---|---|
| Khonvat, Longchaeng | |
| Napho - Xiengmi, Longchaeng | |
| Phonsavat, Longchaeng | |