| Post office | Dudhra B.O |
| Pin code | 841434 |
| Office type | B.O |
| Taluk / city | Siwan |
| District name | Siwan |
| State name | Bihar |
| Delivery status | Delivery |
| Division name | Siwan |
| Region name | Muzaffarpur |
| Circle name | Bihar |
| Related sub office | Goreakothi S.O |
| Related head office | Siwan H.O |
| Pincode | Post office name | City | District | State |
|---|---|---|---|---|
| 841434 | Bhithi B.O | Siwan | Siwan | Bihar |
| 841434 | Dudhra B.O | Siwan | Siwan | Bihar |
| 841434 | Goreakothi S.O | Siwan | Siwan | Bihar |
| 841434 | Harihar Pur Lalgarh B.O | Siwan | Siwan | Bihar |
| 841434 | Hariharpur Kala B.O | Siwan | Siwan | Bihar |
| 841434 | Marachhi B.O | Siwan | Siwan | Bihar |
| 841434 | Sarari B.O | Siwan | Siwan | Bihar |
| 841434 | Sikandrpur B.O | Siwan | Siwan | Bihar |