Karhshi BO is the primary post office registered under PIN code 802102 in Buxar, Bihar. This code sits within the Eastern Postal Region, with 5 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Karhshi BO | BO | Branch Post Office |
| Kamarpur BO | BO | Branch Post Office |
| MVCollege Buxar BO | BO | Branch Post Office |
| Buxar Jail SO | SO | Sub Post Office |
| Pulia BO | BO | Branch Post Office |
