PinCode: 802126, Koran Sarai Post Office, Dumraon, Buxar, Bihar
| Post Office | Koran Sarai |
| Post Office Status | Sub Post Office (Delivery) |
| PinCode | 802126
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| Telephone | 06183-111111 |
| Town/Taluk | Dumraon |
| District | Buxar |
| State | Bihar |
| Postal Division | Bhojpur |
| Postal Region | Patna HQ |
| Postal Circle | Bihar |
List of Other Post Offices in Dumraon, Buxar, Bihar