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
UK telephone code misconceptions whose local 7-digit string began with a number other than 9, starting with 3xx-xxxx: The United Kingdom adopts an open dialling plan for area codes within its public switched telephone network. Therefore, all area codes have a preceding "0" when dialling from within the United Kingdom. When dialling a UK number from abroad, the zero must be omitted. Because of this, it has become common (but incorrect) practice to write telephone numbers used both nationally and internationally with the 0 in parentheses, for example: +44 (0)20 7946 0234; if the number is dialled with the parenthesised zero, the call will