PinCode: 277304, Karnai Post Office, Ballia, Ballia, Uttar Pradesh
| Post Office | Karnai |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 277304
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| Telephone | |
| Town/Taluk | Ballia |
| District | Ballia |
| State | Uttar Pradesh |
| Postal Division | Ballia |
| Postal Region | Gorakhpur |
| Postal Circle | Uttar Pradesh |
List of Other Post Offices in Ballia, Ballia, Uttar Pradesh