PinCode: 855113, Sadapur Post Office, Katihar, Katihar, Bihar
| Post Office | Sadapur |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 855113
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| Telephone | |
| Town/Taluk | Katihar |
| District | Katihar |
| State | Bihar |
| Postal Division | Purnea |
| Postal Region | Muzaffarpur |
| Postal Circle | Bihar |
List of Other Post Offices in Katihar, Katihar, Bihar