In Sonbhadra district, Uttar Pradesh, PIN code 231221 is anchored by Banvasi Seva Ashram BO, a Branch Post Office. Mail addressed to this code is sorted through the Northern Postal Region, across 3 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Banvasi Seva Ashram BO | BO | Branch Post Office |
| Turra SO | SO | Sub Post Office |
| Raspahari B.O | BO | Branch Post Office |
