| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Chepkechei, Chilchila | 20200 |
| Postal/ZIP Codes in Koisagat, Chilchila | 20200 |
| Postal/ZIP Codes in Kokwet, Chilchila | 20200 |
| Postal/ZIP Codes in Siwot, Chilchila | 20200 |
| Postal/ZIP Codes in Songonyet, Chilchila | 20200 |
| Postal/ZIP Codes in Tulwopmoi, Chilchila | 20200 |