PinCode: 852217, Mangwar Post Office, Sonbarsa, Saharsa, Bihar
| Post Office | Mangwar |
| Post Office Status | Sub Post Office (Delivery) |
| PinCode | 852217
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| Telephone | 06475-111111 |
| Town/Taluk | Sonbarsa |
| District | Saharsa |
| State | Bihar |
| Postal Division | Saharsa |
| Postal Region | Muzaffarpur |
| Postal Circle | Bihar |
List of Other Post Offices in Sonbarsa, Saharsa, Bihar