| Place | Postal Code |
|---|---|
| Mauahi, Kosi) | 847452 |
| Mongarihaul, Kosi) | 852131, 847452 |
| Morauna, Kosi) | 847408 |
| Pachgachhia, Kosi) | 847230 |
| Pachlehira, Kosi) | 847452 |
| Parari, Kosi) | 847452 |
| Parikonch, Kosi) | 847452 |
| Parsauni, Kosi) | 847408 |
| Rasuar, Kosi) | 847452 |
| Rataho, Kosi) | 847452 |
| Sarojabela, Kosi) | 847452 |
| Sisauni, Kosi) | 852131 |
| Sukaila, Kosi) | 852131 |
| Postal Codes in Supaul | |
|---|---|
| Basantpur | |
| Chhatapur | |
| Kishanpur | |
| Marauna | |
| Nirmali | |
| Pipra | |
| Pratapganj | |
| Raghopur | |
| Saraigarh Bhaptiyahi | |
| Supaul | |
| Tribeniganj | |