| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Embui, Masii | 90100 |
| Postal/ZIP Codes in Kithangaini, Masii | 90100 |
| Postal/ZIP Codes in Masii, Masii | 90101 |
| Postal/ZIP Codes in Mbaani, Masii | 90100 |
| Postal/ZIP Codes in Mithini, Masii | 90100 |
| Postal/ZIP Codes in Utithini, Masii | 90100 |
| Postal/ZIP Codes in Vyulya, Masii | 90100 |