Pincode 841504 · Siwan District · Bihar
| Name | Karsar BO |
| Type | Branch Post Office |
| Pincode | 841504 |
| Taluk | Siwan Division |
| District | |
| State | |
| Coordinates | 26.2270, 84.3564 |
| Post Office | Type |
|---|---|
| Branch Post Office | |
| Branch Post Office | |
| Branch Post Office |
Siwan, Bihar. Map data: OpenStreetMap, CARTO.
| NIKHTI KALA BO | Branch Post Office |
| Raghunathpur SO Siwan | Post Office |
| Rajpur BO | Branch Post Office |
| Ramnagar BO | Branch Post Office |