Telephone numbers in India operator as well as the service and the company. Telemarketers have been issued 10-digit telephone numbers starting with 140 (140XXXXXXX) by the Department of Telecommunications on TRAI's request. 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.
Area code 602 areas of the metro area. And it is the only million-plus populated area where 7-digit dialling would still be possible. Area code 602 North American area code 602 is a state of Arizona telephone area code that covers most of the city of Phoenix. It was one of the original area codes established in October 1947 and originally covered the entire state of Arizona until 1995, when area code 520 was established as the state's second area code. Arizona's explosive population growth during the second half of the 20th century would have made a split necessary in any event. However,