PinCode: 841204, Chainwa Post Office, Ekma, Saran, Bihar
| Post Office | Chainwa |
| Post Office Status | Sub Post Office (Delivery) |
| PinCode | 841204
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| Telephone | 06152-111111 |
| Town/Taluk | Ekma |
| District | Saran |
| State | Bihar |
| Postal Division | Saran |
| Postal Region | Muzaffarpur |
| Postal Circle | Bihar |
List of Other Post Offices in Ekma, Saran, Bihar