| Place | Post Code |
|---|---|
| Kaplelach, Koibatek | 20100 |
| Kipkaber, Koibatek | 20100 |
| Kiplombe, Koibatek | 20100 |
| Kirobon, Koibatek | 20100 |
| Lebolos, Koibatek | 20100 |
| Orinie, Koibatek | 20100 |
| Solian, Koibatek | 20100 |
| All postal codes in Eldama Ravine | |
|---|---|
| Koibatek, Eldama Ravine | |
| Lembus, Eldama Ravine | |
| Lembus Kwen, Eldama Ravine | |
| Lembus/Perkerra, Eldama Ravine | |
| Mumberes/Maji Mazuri, Eldama Ravine | |
| Ravine, Eldama Ravine | |