Medavakkam SO is the primary post office registered under PIN code 600100 in Chengalpattu, Tamil Nadu. This code sits within the Southern Postal Region, with 3 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Medavakkam SO | SO | Sub Post Office |
| Pallikaranai SO | SO | Sub Post Office |
| Perumbakkam S.O | SO | Sub Post Office |
