Vriddhachalam H.O is the primary post office registered under PIN code 606001 in Cuddalore, Tamil Nadu. This code sits within the Southern Postal Region, with 3 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Vriddhachalam H.O | HO | Head Post Office |
| Vriddhachalam Cutchery S.O | SO | Sub Post Office |
| Vriddhachalam Bazaar S.O | SO | Sub Post Office |
