| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Belhi, Kosi) | 847452, 847237 |
| Postal/ZIP Codes in Bhawanipur Patni, Kosi) | 852125 |
| Postal/ZIP Codes in Chilauni, Kosi) | 852125 |
| Postal/ZIP Codes in Durgapur, Kosi) | 852125 |
| Postal/ZIP Codes in Garhia, Kosi) | 852125 |
| Postal/ZIP Codes in Govindpur, Kosi) | 852125 |
| Postal/ZIP Codes in Inampatti, Kosi) | 852125 |
| Postal/ZIP Codes in Jainagara, Kosi) | 852125 |
| Postal/ZIP Codes in Mouahi, Kosi) | 847452 |
| Postal/ZIP Codes in Parsabirbal, Kosi) | 852125 |
| Postal/ZIP Codes in Pratapganj, Kosi) | 852125 |
| Postal/ZIP Codes in Siripur, Kosi) | 852125 |
| Postal/ZIP Codes in Situhar, Kosi) | 852125 |
| Postal/ZIP Codes in Sukhanagar, Kosi) | 852125 |
| Postal/ZIP Codes in Surjapur, Kosi) | 852125 |
| Postal/ZIP Codes in Tekuna, Kosi) | 852125 |
| Postal/ZIP Codes in Thalha, Kosi) | 852111 |