| Office Name | Sisai B.O |
| Pincodes | 852202 |
| Area | Sisai |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Saharsa |
| Postal Region | Muzaffarpur |
| District | Saharsa |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Sisai B.O |
| Pincodes | 841422 |
| Area | Sisai |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Saran |
| Postal Region | Muzaffarpur |
| District | Saran |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Sisai B.O |
| Pincodes | 841426 |
| Area | Sisai |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Siwan |
| Postal Region | Muzaffarpur |
| District | Gopalganj |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Sisai B.O |
| Pincodes | 845104 |
| Area | Sisai |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | West Champaran |
| Postal Region | Muzaffarpur |
| District | West Champaran |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Sisai B.O |
| Pincodes | 271401 |
| Area | Sisai |
| Office Status | Branch Post Office |
| Postal Circle | Uttar Pradesh |
| Postal Division | Gonda |
| Postal Region | Gorakhpur |
| District | Gonda |
| State | Uttar Pradesh |
| Telephone No. | Na |