| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Kaplelach, Koibatek | 20100 |
| Postal/ZIP Codes in Kipkaber, Koibatek | 20100 |
| Postal/ZIP Codes in Kiplombe, Koibatek | 20100 |
| Postal/ZIP Codes in Kirobon, Koibatek | 20100 |
| Postal/ZIP Codes in Lebolos, Koibatek | 20100 |
| Postal/ZIP Codes in Orinie, Koibatek | 20100 |
| Postal/ZIP Codes in Solian, Koibatek | 20100 |