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 246 from outside the NANP (e.g. from the United Kingdom), callers must dial their international dialling prefix followed by 1 to access the North American Numbering Plan. For example, a call placed from the United Kingdom would be dialled as 00 + 1 + 246 + local seven digit phone number. Failure to include the prefix "1" results in accessing country calling code 246 of British Indian Ocean Territory ("Diego Garcia"). When placing a phone call from Barbados, also known as HPNA, callers simply use seven-digit dialling (i.e. dialling the last seven digits of the phone number). Unlike in some other