| Post Office | Karkain |
| Division | Monghyr |
| Region | Patna Hq |
| Circle | Bihar |
| Taluka | Ghoswari |
| District | Patna |
| State | Bihar |
| Phone | NA |
| Sub Office | Sarmera S.O |
| Head Office | Munger H.O |
| Pincode |
811104
|
| Post Office | Samyagarh |
| Division | Nalanda |
| Region | Patna Hq |
| Circle | Bihar |
| Taluka | Ghoswari |
| District | Patna |
| State | Bihar |
| Phone | 06112-232034 |
| Sub Office | NA |
| Head Office | Biharsharif H.O |
| Pincode |
803306
|