| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Mauahi, Kosi) | 847452 |
| Postal/ZIP Codes in Mongarihaul, Kosi) | 852131, 847452 |
| Postal/ZIP Codes in Morauna, Kosi) | 847408 |
| Postal/ZIP Codes in Pachgachhia, Kosi) | 847230 |
| Postal/ZIP Codes in Pachlehira, Kosi) | 847452 |
| Postal/ZIP Codes in Parari, Kosi) | 847452 |
| Postal/ZIP Codes in Parikonch, Kosi) | 847452 |
| Postal/ZIP Codes in Parsauni, Kosi) | 847408 |
| Postal/ZIP Codes in Rasuar, Kosi) | 847452 |
| Postal/ZIP Codes in Rataho, Kosi) | 847452 |
| Postal/ZIP Codes in Sarojabela, Kosi) | 847452 |
| Postal/ZIP Codes in Sisauni, Kosi) | 852131 |
| Postal/ZIP Codes in Sukaila, Kosi) | 852131 |