To find STD code in Tamil Nadu, use the STD code finder presented by stdcodein.com. When you select Tamil Nadu from the drop down box in the table alongside you will get STD code list of all the districts/talukas in the state. Further narrow down you search by selecting the desired city. This STD code locator tool will provide you with the Tamil Nadu STD number you are searching for. If you know the STD code and want to find out to which city and state it belongs, use our search by STD code tool.
Here are some STD code details for Tamil Nadu STD codes. Metro cities have shorter STD codes i.e. 2- digit numbers. Tier-2 cities in India have 3 digit STD codes. A telephone number is of 10 digits, it consist of 2 or 3 digit STD code and the phone number. When we are dialing from a landline phone in one STD code area to another area, a prefix of “0” is added to STD code. When we are dialing from a mobile phone in India to any landline then also we need to add “0” before the STD code irrespective of the area. A code of four or more digits, other than those comprising a subscriber's local telephone number determines the routing of a call. If dialing from outside India, a prefix of “+91” is required with the STD no. to connect a call.