| Place | Post Code |
|---|---|
| Chachanam, Chomchaeng | 03000 |
| Chakhamxao, Chomchaeng | 03000 |
| Chommok, Chomchaeng | 03000 |
| Don Mai, Chomchaeng | 03000 |
| Houanamlong, Chomchaeng | 03000 |
| Louang, Chomchaeng | 03000 |
| Palao, Chomchaeng | 03000 |
| Phate Kao, Chomchaeng | 03000 |
| Phoping, Chomchaeng | 03000 |
| Photham, Chomchaeng | 03000 |
| Photong, Chomchaeng | 03000 |
| All postal codes in Long | |
|---|---|
| Chaleunxai, Long | |
| Chamai, Long | |
| Chomchaeng, Long | |
| Chongka, Long | |
| Sa, Long | |
| Sivilai, Long | |
| Sompan, Long | |
| That, Long | |
| Xiengkok, Long | |