| Place | Post Code |
|---|---|
| Arror, Arror | 30700 |
| Chepkum, Arror | 30700 |
| Kapchemuta, Arror | 30700 |
| Koitilial, Arror | 30700 |
| Niwai, Arror | 30700 |
| Ressim, Arror | 30700 |
| All postal codes in Marakwet West | |
|---|---|
| Arror, Marakwet West | |
| Cherang'Any/Chebororwa, Marakwet West | |
| Kapsowar, Marakwet West | |
| Moiben/Kuserwo, Marakwet West | |
| Sengwer, Marakwet West | |