| Police |
100 |
| Fire Control |
101 |
| JSSK – Janani Sishu Suraksha Kariyakaram |
102 |
| Traffice Police |
103 |
| Accident Helpline |
108 |
| Disaster Helpline |
1077 |
| Child Helpline |
1098 |
| Women Helpline |
181 |
| Lions Blood Bank |
28415959 |
| St. Johns Ambulance Association |
28194630 |
| Chennai Corporation Complaints |
1913 |
| Railways Reservation Enquiry |
132 |
| Automated Reservation Query |
139 |
| Tourist Enquiry |
1913 |
| Tourism Office of Govt. of Tamil Nadu |
25368538 |
| Tourism Office of Govt. of India |
28460285 |
| BSNL Telephone Directory Enquiry |
197 |
| BSNL Telephone Local Assistance |
199 |
| Eye Bank |
1919 |
| Gas Helpline |
1716 |
