Hindustan Building SO is the primary post office registered under PIN code 700072 in Kolkata, West Bengal. This code sits within the Eastern Postal Region, with 3 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Hindustan Building SO | SO | Sub Post Office |
| Princep Street SO | SO | Sub Post Office |
| Sooterkin Street SO | SO | Sub Post Office |
