| Place | Post Code |
|---|---|
| Angkham, Koutchik | 16000 |
| Boungkae, Koutchik | 16000 |
| Donkhuang, Koutchik | 16000 |
| Kaengyao, Koutchik | 16000 |
| Nonekhoung, Koutchik | 16000 |
| Nonephachao, Koutchik | 16000 |
| Nonesaat, Koutchik | 16000 |
| Nongphue, Koutchik | 16000 |
| Songkhorn, Koutchik | 16000 |
| Tha, Koutchik | 16000 |
| Vang-E-Kit, Koutchik | 16000 |
| All postal codes in Phonthong | |
|---|---|
| Donggnang, Phonthong | |
| Koutchik, Phonthong | |
| Nonkhoun, Phonthong | |
| Phon-gnai, Phonthong | |
| Phonthong, Phonthong | |