| Police |
100 |
| Traffic Police |
103 |
| Police (Outside city limits) |
108 |
| Fire Control |
101 |
| Ambulance (of Fire Services Department) |
102 |
| Women Helpline |
1091 |
| Lions Blood Bank |
1910 |
| Apollo Ambulance |
1066 |
| St. Johns Ambulance Association |
2819 4630 |
| Trauma Care Consortium |
2815 0700 |
| Electricity Fuse Off Call Management |
1912 |
| Electricity Supply Failure (L.T.) |
28521148 |
| Electricity Supply Failure (H.T.) |
28521787 |
| Chennai Corporation Complaints |
25384670 |
| Street Light Repair Service |
25384530 |
| Chennai Metro Water Complaints Cell |
28535312 |
