There are 4 post offices under PIN code 600103.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Andarkuppam B.O | Branch Office | Delivery | Ambattur | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Manali New Town S.O | Sub Office | Delivery | Gummidipoondi | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Vellivoyalchavadi B.O | Branch Office | Delivery | Ambattur | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Vichoor B.O | Branch Office | Delivery | Ambattur | Tiruvallur | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |