PinCode: 811104, Karkain Post Office, Ghoswari, Patna, Bihar
| Post Office | Karkain |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 811104
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| Telephone | |
| Town/Taluk | Ghoswari |
| District | Patna |
| State | Bihar |
| Postal Division | Monghyr |
| Postal Region | Patna HQ |
| Postal Circle | Bihar |
List of Other Post Offices in Ghoswari, Patna, Bihar