There are 10 post offices under PIN code 601204.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Aladu B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Amoor B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Arasur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Krishnapuram B.O | Branch Office | Non-Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Medur B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Panjetti B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Perumbedu B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 8 | Ponneri Public Office S.O | Sub Office | Non-Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 9 | Ponneri S.O | Sub Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 10 | Reddipalayam B.O | Branch Office | Delivery | Ponneri | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |