| Post Office | Sadarpur |
| Division | Monghyr |
| Region | Patna Hq |
| Circle | Bihar |
| Taluka | Asthama |
| District | Nalanda |
| State | Bihar |
| Phone | NA |
| Sub Office | Barbigha S.O |
| Head Office | Munger H.O |
| Pincode |
811101
|
| Post Office | Asthawan |
| Division | Nalanda |
| Region | Patna Hq |
| Circle | Bihar |
| Taluka | Asthama |
| District | Nalanda |
| State | Bihar |
| Phone | 06112-248221 |
| Sub Office | NA |
| Head Office | Biharsharif H.O |
| Pincode |
803107
|