There are 11 post offices under PIN code 601203.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Anuppampattu B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Devadanam B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Jothi Nagar B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Kattur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Minjur S.O | Sub Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Nallur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Neidavoyal B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 8 | Seemapuram South B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 9 | Thriuvellavoyal B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 10 | Velur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 11 | Voyalur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |