There are 4 post offices under PIN code 603103.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kelambakkam S.O | Sub Office | Delivery | Chingleput | Kanchipuram | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Padur B.O | Branch Office | Delivery | Chinglepet | Kanchipuram | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Pudupakkam B.O | Branch Office | Delivery | Chinglepet | Kanchipuram | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Thaiyur B.O | Branch Office | Delivery | Chinglepet | Kanchipuram | Tambaram | Chennai Region | Tamil Nadu | Tamilnadu |