Pincode 841439 is a 6-digit postal code serving 9 post offices in Siwan district, Bihar. Mustfabad SO is the Post Office for this area, located at 25.9120°N, 84.2128°E. The first digit ‘8’ identifies the Bihar postal region; the full code pinpoints the Siwan delivery zone.
| Post Office | Type |
|---|---|
| Mustfabad SO | Post Office |
| Agya BO | Branch Post Office |
| Chainpur BO | Branch Post Office |
| Kaladumra BO | Branch Post Office |
| Laxmiganj BO | Branch Post Office |
| Purandarpur BO | Branch Post Office |
| Sahatwar BO | Branch Post Office |
| Saidpura BO | Branch Post Office |
| Sani Basantpur 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.