| Sr. No. | Office Name | Pincode | Office Type Status | Delivery Status | Division | Region | Circle | Taluk | District Name | Telephone | Related Sub Office | Related Head office |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 21. | Baijubarhoga B.O | 841406 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Basantpur S.O (Siwan) | Siwan H.O |
| 22. | Bakerganj S.O | 841286 | Sub Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Hasanpura | Siwan | 06154-111111 | - | Siwan H.O |
| 23. | Bakhri B.O | 841203 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Chainpur S.O (Siwan) | Siwan H.O |
| 24. | Balaun B.O | 841244 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Takipur S.O | Siwan H.O |
| 25. | Balhu B.O | 841234 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Darauli S.O | Siwan H.O |
| 26. | Balia B.O | 841506 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Tarwara S.O | Siwan H.O |
| 27. | Ballia B.O | 841237 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Hussainganj S.O | Siwan H.O |
| 28. | Balliapokhra B.O | 841238 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Mahrajganj S.O (Siwan) | Siwan H.O |
| 29. | Balua B.O | 841435 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Guthni S.O | Siwan H.O |
| 30. | Bangra B.O | 841203 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Chainpur S.O (Siwan) | Siwan H.O |
| 31. | Bangra B.O | 841238 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Mahrajganj S.O (Siwan) | Siwan H.O |
| 32. | Banthu Sriram B.O | 841245 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Zeradei S.O | Siwan H.O |
| 33. | Bardaha B.O | 841245 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Zeradei S.O | Siwan H.O |
| 34. | Bargaon B.O | 841239 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Mairwa S.O | Siwan H.O |
| 35. | Barhan Bazar B.O | 841227 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Gaushalaroad Siwan S.O | Siwan H.O |
| 36. | Barheya B.O | 841226 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Satation Road S.O | Siwan H.O |
| 37. | Barhipurgop B.O | 841408 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Bhagwanpur Hat | Siwan | - | Bhagwanpur Hat S.O | Siwan H.O |
| 38. | Barhni B.O | 841227 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Gaushalaroad Siwan S.O | Siwan H.O |
| 39. | Barhria S.O | 841232 | Sub Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | 06154-111111 | - | Siwan H.O |
| 40. | Barhulia B.O | 841245 | Branch Post Office | Delivery | Siwan | Muzaffarpur | Bihar | Siwan | Siwan | - | Zeradei S.O | Siwan H.O |
