PinCode: 847452, Ratnasara Post Office, Chhatapur, Supaul, Bihar
| Post Office | Ratnasara |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 847452
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| Telephone | |
| Town/Taluk | Chhatapur |
| District | Supaul |
| State | Bihar |
| Postal Division | Madhubani |
| Postal Region | Muzaffarpur |
| Postal Circle | Bihar |
List of Other Post Offices in Chhatapur, Supaul, Bihar