There are 9 post offices under PIN code 631204.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Arcot B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Illuppur B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Kanakammachatram S.O | Sub Office | Delivery | Na | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Kanchipadi B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Muthukondapuram B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Nabalur B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 7 | Nedambaram B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 8 | Ramanjeri B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |
| 9 | Ramapuram B.O | Branch Office | Delivery | Tiruttani | Tiruvallur | Kanchipuram | Chennai Region | Tamil Nadu | Tamilnadu |