Gudavalli B.O is the primary post office registered under PIN code 521104 in Ntr, Andhra Pradesh. This code sits within the Southern Postal Region, with 3 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Gudavalli B.O | BO | Branch Post Office |
| Velpuru B.O | BO | Branch Post Office |
| Nidamanuru S.O | SO | Sub Post Office |
