Telephone numbers in India Telephone numbers in India Telephone numbers in India are administered under the "National Numbering Plan of 2003" by the Department of Telecommunications. The numbering plan was last updated in 2015. The International Telecommunication Union has assigned the country calling code "91" to India. Subscriber Trunk Dialling (STD) codes are assigned to each city/town/village, with the larger Metro cities having shorter area codes (STD codes), which are from 2 to 8 digits long. For example, Tier-2 Cities or culturally significant towns in India have STD code with 3 digits. For example, Kanpur and Lucknow were the two cities between which the
Area code 000 Area code 000 Area code 000 is not a valid number in any country where dialling '0' reaches an operator. Area code 000 is not a valid North American Numbering Plan exchange or area code. It is invalid in the European Union and many other nations where '0' is reserved as a trunk prefix and '00' as an international call prefix. In Australia, 000 is reserved as an emergency telephone number. This code may show up as part of a number on a caller id system when receiving telemarketer outbound calls or from VoIP services, such as Skype or Vonage,