| Office Name | Baisi S.O |
| Pincodes | 854315 |
| Area | Baisi |
| Office Status | Sub Post Office |
| Postal Circle | Bihar |
| Postal Division | Purnea |
| Postal Region | Muzaffarpur |
| District | Purnia |
| State | Bihar |
| Telephone No. | 06454-214461 |
| Office Name | Baisi B.O |
| Pincodes | 852215 |
| Area | Baisi |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Saharsa |
| Postal Region | Muzaffarpur |
| District | Supaul |
| State | Bihar |
| Telephone No. | Na |