There are 4 post offices under PIN code 600077.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Ayapakkam B.O | Branch Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Numbal B.O | Branch Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Thiruverkadu S.O | Sub Office | Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Veeraraghavapuram B.O | Branch Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |