| Place | Post Code |
|---|---|
| Huayhoi, Namuang | 11000 |
| Natan, Namuang | 11000 |
| Nayang, Namuang | 11000 |
| Nongbua (Nonglaeng), Namuang | 11000 |
| Phahorm, Namuang | 11000 |
| Phaphieng, Namuang | 11000 |
| Phaxing, Namuang | 11000 |
| Vangpene, Namuang | 11000 |
| Vangphieng, Namuang | 11000 |
| All postal codes in Viengthong | |
|---|---|
| Chomthong, Viengthong | |
| Namuang, Viengthong | |
| Naxouang, Viengthong | |
| Phathong, Viengthong | |
| Thadua, Viengthong | |
| Thongmixai, Viengthong | |