Sirudamur BO is the primary post office registered under PIN code 603307 in Chengalpattu, Tamil Nadu. This code sits within the Southern Postal Region, with 5 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Sirudamur BO | BO | Branch Post Office |
| Ananthamangalam BO | BO | Branch Post Office |
| Minnal Sithamur BO | BO | Branch Post Office |
| Vadamanipakkam BO | BO | Branch Post Office |
| Orathy SO | SO | Sub Post Office |
