| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Bara Singhia, Kosi) | 852107 |
| Postal/ZIP Codes in Barsam, Kosi) | 852217, 852221 |
| Postal/ZIP Codes in Bishanpur, Kosi) | 852107 |
| Postal/ZIP Codes in Dhabauli, Kosi) | 852107 |
| Postal/ZIP Codes in Gulam, Kosi) | 852107 |
| Postal/ZIP Codes in Jamhara, Kosi) | 852217 |
| Postal/ZIP Codes in Jirwa, Kosi) | 852107 |
| Postal/ZIP Codes in Kapasia, Kosi) | 852107 |
| Postal/ZIP Codes in Kishanpur, Kosi) | 852217 |
| Postal/ZIP Codes in Lachhmipur, Kosi) | 852107 |
| Postal/ZIP Codes in Paharpur, Kosi) | 852217 |
| Postal/ZIP Codes in Pama, Kosi) | 852107 |
| Postal/ZIP Codes in Pastpar, Kosi) | 852107 |
| Postal/ZIP Codes in Patarghat, Kosi) | 852107 |
| Postal/ZIP Codes in Rahua, Kosi) | 852127 |
| Postal/ZIP Codes in Sahgaura, Kosi) | 852107 |
| Postal/ZIP Codes in Sour Bazar, Kosi) | 852221 |