Avadi IAF SO is the primary post office registered under PIN code 600055 in Thiruvallur, Tamil Nadu. This code sits within the Southern Postal Region, with 7 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Avadi IAF SO | SO | Sub Post Office |
| Koduvalli BO | BO | Branch Post Office |
| Pandeeswaram BO | BO | Branch Post Office |
| Morai BO | BO | Branch Post Office |
| Palavedu BO | BO | Branch Post Office |
| Mittanamalli BO | BO | Branch Post Office |
| CRP camp SO Tiruvallur | OTHER | post office |
