Important Contacts
STD Code : 044
Chennai
| Department in Collectorate | Contact Number |
| District Collector -Chengalpattu | 27427412 |
| District court | 27431442 |
| District Educational Office | 27426268 |
| Sub Registrar Office – Rajaji Street | 27423692 |
| Sub Registrar Office – Natham | 27422003 |
| BSNL COMPLAINTS | 198 |
| BSNL Billing Enquiry | 27423300 |
| BSNL Customer Service Centre | 27430306 |
| Town Police Station | 27424423, 100 |
| Women Police Station | 27431441, 27432101 |
| DSP office | 27431424 |
| Fire and Rescue Station | 27431299, 101 |
| Electricity | 27431450 |
| Municipal Office | 27424251 |
| Railway | 27423444 |
| Sub Collector Office | 27426492 |
| Taluk Office | 27422418 |
| RTO office | 27464996 |
| Bus Enquiry | 27424471 |
| Golden Gas Agency | 27422400 |
| Naga Gas Agency | 8124024365 |
| Arasu Gas Agency | 27433664 |
| Sub Treasury | 27430098 |
Banks
| Bank | Contact Number |
| State Bank of India | 27430610 |
| Canara Bank | 27433973 |
| Indian Bank | 27423336 |
| Lakshmi Vilas Bank | 27423356 |
| IDIB Bank | 27457503 |
| Indian Over Sees Bank | 27431401 |
| Urban Bank H.O | 27422321 |
| Bank of Baroda | 27430224 |
| Syndicate Bank | 27433373 |
| ICICI Bank | 27433565 |
| HDFC Bank | 27430589 |
| AXIS Bank | 27433996 |
| Karur Visya Bank | 27431555 |
| Oriental Bank | 27426428 |