Subscriber trunk dialling, also known as subscriber toll dialing, is a telephone numbering plan feature and telecommunications technology for the dialing of trunk calls by telephone subscribers without the assistance from switchboard operators.

How do I find my STD code?

To get the STD code, select the state and the city then press the "get it" button and the STD code for that city will be shown. In addition, to know the codes of all cities and towns within any state, select a state and the names of its cities and towns will be displayed.

What is STD code example?

Subscriber trunk dialling (STD) codes are assigned to each city, town and village. These codes can be between 2 and 8 digits long, with the largest metropolitan areas and cities having the shortest (two-digit) codes: 11 - New Delhi, Delhi. 22 - Mumbai, Maharashtra.