| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Fen, Kat | 04000 |
| Postal/ZIP Codes in Houaylieng, Kat | 04000 |
| Postal/ZIP Codes in Houayphong, Kat | 04000 |
| Postal/ZIP Codes in Houaytam, Kat | 04000 |
| Postal/ZIP Codes in Kat, Kat | 04000 |
| Postal/ZIP Codes in Longgna, Kat | 04000 |
| Postal/ZIP Codes in Pounghieng, Kat | 04000 |
| Postal/ZIP Codes in Samsao, Kat | 04000 |