STD Code : 044 Chennai
| Department in Collectorate | Contact Number |
| District Collector -Chengalpattu | 27427412 |
| District court | 27431442 |
| District Educational Office | 27426268 |
STD Code : 044 Chennai
| Department in Collectorate | Contact Number |
| District Collector -Chengalpattu | 27427412 |
| District court | 27431442 |
| District Educational Office | 27426268 |