Pincode 841236 is a 6-digit postal code serving 7 post offices in Siwan district, Bihar. Hasanpura SO is the Post Office for this area, located at 26.0760°N, 84.3568°E. The first digit ‘8’ identifies the Bihar postal region; the full code pinpoints the Siwan delivery zone.
| Post Office | Type |
|---|---|
| Hasanpura SO | Post Office |
| Aranda BO | Branch Post Office |
| Bhikhpur Bhgwanpur BO | Branch Post Office |
| Dhanutihata BO | Branch Post Office |
| Rajanpura BO | Branch Post Office |
| Rampur Ke Tola BO | Branch Post Office |
| Siswan Kala BO | Branch Post Office |
Data sourced from India Post, Department of Posts, Government of India. Data last verified: May 2026.
Siwan, Bihar. Map data: OpenStreetMap, CARTO.