There are 3 post offices under PIN code 600020.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Adyar S.O (Chennai) | Sub Office | Delivery | Chennai City Corporation | Chennai | Chennai City South | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Kasturibai Nagar S.O | Sub Office | Non-Delivery | Chennai City Corporation | Chennai | Chennai City South | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Shastri Nagar S.O (Chennai) | Sub Office | Non-Delivery | Chennai City Corporation | Chennai | Chennai City South | Chennai Region | Tamil Nadu | Tamilnadu |