| Post office | Kalyanpur B.O |
| Pin code | 841425 |
| Office type | B.O |
| Taluk / city | Gopalganj |
| District name | Gopalganj |
| State name | Bihar |
| Delivery status | Delivery |
| Division name | Siwan |
| Region name | Muzaffarpur |
| Circle name | Bihar |
| Related sub office | Bathubazar S.O |
| Related head office | Gopalganj H.O |
| Pincode | Post office name | City | District | State |
|---|---|---|---|---|
| 841425 | Bathubazar S.O | Gopalganj | Gopalganj | Bihar |
| 841425 | Bhagwatparsa B.O | Gopalganj | Gopalganj | Bihar |
| 841425 | Chhitauna B.O | Gopalganj | Gopalganj | Bihar |
| 841425 | Kalyanpur B.O | Gopalganj | Gopalganj | Bihar |
| 841425 | Phulwaria B.O | Gopalganj | Gopalganj | Bihar |
| 841425 | Songharwa B.O | Gopalganj | Gopalganj | Bihar |