| Place | Postal Code |
|---|---|
| Gaaki, Aguthi-Gaaki | 10100 |
| Gathaithi, Aguthi-Gaaki | 10100 |
| Gichira, Aguthi-Gaaki | 10100 |
| Gititu, Aguthi-Gaaki | 10100 |
| Huhoini, Aguthi-Gaaki | 10100 |
| Ithekahuno, Aguthi-Gaaki | 10100 |
| Kiawathanji, Aguthi-Gaaki | 10100 |
| Mungaria, Aguthi-Gaaki | 10100 |
| Mutathiini, Aguthi-Gaaki | 10100 |
| Thageini, Aguthi-Gaaki | 10100 |
| Postal Codes in Tetu | |
|---|---|
| Aguthi-Gaaki, Tetu | |
| Dedan Kimanthi, Tetu | |
| Wamagana, Tetu | |