STD(Subscriber Trunk Dialling) codes or landline Area calling code are assigned to each city/town/village here it is 0423 , with the larger Metro cities having shorter area codes (STD code), the shortest being 2 digits, Tier-2 Cities have STD codes with 3 digits & for remote places being 4 digits.
No prefix is required to call from one landline to another in the same STD area Delhi, New delhi. A prefix of “0+STD code” is required to dial from Delhi, New delhi landline phone to another Place. A prefix of “0+STD code” is required to dial from a mobile phone to landline any where in India
Tamil Nadu State – short code TN has Population of (according to 2011 Census) 72,138,958. IT covers area of 130,058 Km2, cosisting 30 Districts,16,317 Villages, 832 Towns. The capital of Tamil Nadu is Chennai. People of Tamil Nadu commonly speak Tamil.