| Place | Post Code |
|---|---|
| Chebwek, Cheptais | 50200 |
| Chepkube, Cheptais | 50200 |
| Cheptais, Cheptais | 50201 |
| Ngachi, Cheptais | 50200 |
| All postal codes in Mt. Elgon | |
|---|---|
| Cheptais, Mt. Elgon | |
| Chepyuk, Mt. Elgon | |
| Chesikaki, Mt. Elgon | |
| Elgon, Mt. Elgon | |
| Kapkateny, Mt. Elgon | |
| Kaptama, Mt. Elgon | |