Pincode 841509 is a 6-digit postal code serving 4 post offices in Siwan district, Bihar. Gabhirar SO is the Post Office for this area, located at 25.6958°N, 83.8971°E. The first digit ‘8’ identifies the Bihar postal region; the full code pinpoints the Siwan delivery zone.
| Post Office | Type |
|---|---|
| Gabhirar SO | Post Office |
| Newari BO | Branch Post Office |
| Panjwar BO | Branch Post Office |
| Tari 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.