There are 9 post offices under PIN code 603104.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kadambadi B.O | Branch Office | Delivery | Tirukalikundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Kokilamedu B.O | Branch Office | Delivery | Tirukalilkundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Koothavakkam B.O | Branch Office | Delivery | Sriperumbudur | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Mamallapuram S.O | Sub Office | Delivery | Tirukalikundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Pattipulam B.O | Branch Office | Delivery | Tirukalikundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Perur B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Poonjeri B.O | Branch Office | Delivery | Na | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 8 | Vadakadambadi B.O | Branch Office | Delivery | Tirukalikundram | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |
| 9 | Zamin Paiyanur B.O | Branch Office | Delivery | Chengalpattu | Kanchipuram | Chengalpattu | Chennai Region | Tamil Nadu | Tamilnadu |