Karsar BO is the primary post office registered under PIN code 802129 in Buxar, Bihar. This code sits within the Eastern Postal Region, with 13 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Karsar BO | BO | Branch Post Office |
| Atimi BO | BO | Branch Post Office |
| Dhanbakhra BO | BO | Branch Post Office |
| Jigna BO | BO | Branch Post Office |
| Pararia Pramanpur BO | BO | Branch Post Office |
| Sikraul BO | BO | Branch Post Office |
| Basaon Kalan BO | BO | Branch Post Office |
| Belaon BO | BO | Branch Post Office |
| Bhatauli BO | BO | Branch Post Office |
| Bisikala BO | BO | Branch Post Office |
| Girdharpur BO | BO | Branch Post Office |
| Rupsagar BO | BO | Branch Post Office |
| Nawanagar SO Buxar | OTHER | post office |
