Understanding STD Codes in Tamil Nadu, India

Tamil Nadu, with its capital city Chennai, is a vibrant state in southern India. Major districts include Coimbatore, Madurai, Tiruchirappalli, and Salem. This guide provides clear instructions on how to dial landline numbers within Tamil Nadu from both within India and from international locations.  

Dialing within India

To call a landline number in any district of Tamil Nadu from another district within India, follow these steps:

  • Step 1: Dial the prefix '0'. This is the national trunk access code for domestic long-distance calls within India.
  • Step 2: Enter the specific STD code for the desired district in Tamil Nadu. (e.g., Chennai's STD code is 044).
  • Step 3: Dial the local landline number.

The complete dialing format is: 0 + STD code + local number.

Dialing from Outside India

To call a landline number in Tamil Nadu from an international location, use the following format:

  • Step 1: Dial your country's international access code (e.g., '+' is commonly used).
  • Step 2: Enter India's country code, which is '91'.
  • Step 3: Dial the STD code for the specific district in Tamil Nadu, without the initial '0'.
  • Step 4: Enter the local landline number.

The complete international dialing format is: + 91 + STD code + local number.