| Place | Post Code |
|---|---|
| Gathuthi, Wamagana | 10100 |
| Hubuini, Wamagana | 10100 |
| Ihithe, Wamagana | 10100 |
| Karangia, Wamagana | 10100 |
| Karuguini, Wamagana | 10100 |
| Kiaguri, Wamagana | 10100 |
| Kiamutiga, Wamagana | 10100 |
| Kianjogu, Wamagana | 10100 |
| Kigwandi, Wamagana | 10100 |
| Mathakwaini, Wamagana | 10100 |
| Mbaaini, Wamagana | 10100 |
| Ndugamano, Wamagana | 10100 |
| Tucha, Wamagana | 10100 |
| Unjiru, Wamagana | 10100 |
| All postal codes in Tetu | |
|---|---|
| Aguthi-Gaaki, Tetu | |
| Dedan Kimanthi, Tetu | |
| Wamagana, Tetu | |