Gainsari SO is the primary post office registered under PIN code 271210 in Balrampur, Uttar Pradesh. This code sits within the Northern Postal Region, with 13 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Gainsari SO | SO | Sub Post Office |
| Bakaulirajpur BO | BO | Branch Post Office |
| Thakurapur BO | BO | Branch Post Office |
| Bhojpur Tharu BO | BO | Branch Post Office |
| Khamahariya BO | BO | Branch Post Office |
| Shivpur Mhadev BO | BO | Branch Post Office |
| Hallaura BO | BO | Branch Post Office |
| Puraina BO | BO | Branch Post Office |
| Chauhattar Khurd BO | BO | Branch Post Office |
| Gulriha Sandwa BO | BO | Branch Post Office |
| Jamuni Kala BO | BO | Branch Post Office |
| Manikapur BO | BO | Branch Post Office |
| Sonpur BO | BO | Branch Post Office |
