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 562 at the time of 310's creation, Pacific Bell (now AT&T Inc.) was the primary telephone company for most of Southern California, whereas this region's primary telephone company was GTE (now Verizon). In fact, when this region was originally split from the 213 area code to become the 310 area code, Pacific Bell, being the primary local telephone company for this area (and had authority to decide what codes stayed in 213 and which ones moved), chose to move all of GTE's area code 213 exchanges into the 310 area code. Area code 562 Area code 562 is a California telephone