PinCode: 805107, Kosi (Nawada) Post Office, Roh, Nawada, Bihar
| Post Office | Kosi (Nawada) |
| Post Office Status | Sub Post Office (Delivery) |
| PinCode | 805107
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| Telephone | 06324-212306 |
| Town/Taluk | Roh |
| District | Nawada |
| State | Bihar |
| Postal Division | Nawadha |
| Postal Region | Patna HQ |
| Postal Circle | Bihar |
List of Other Post Offices in Roh, Nawada, Bihar