PinCode: 847225, Jonki Post Office, Jainagar, Madhubani, Bihar
| Post Office | Jonki |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 847225
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| Telephone | |
| Town/Taluk | Jainagar |
| District | Madhubani |
| State | Bihar |
| Postal Division | Madhubani |
| Postal Region | Muzaffarpur |
| Postal Circle | Bihar |
List of Other Post Offices in Jainagar, Madhubani, Bihar