There are 5 post offices under PIN code 600056.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Iyyappanthangal S.O | Sub Office | Non-Delivery | Sriperumbudur | Kanchipuram | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Kattupakkam B.O | Branch Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Poonamallee East S.O | Sub Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Poonamallee S.O | Sub Office | Delivery | Poonamalee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Senneerkuppam B.O | Branch Office | Non-Delivery | Poonamallee | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |