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
Former Australian dialling codes Former Australian dialling codes The format of telephone numbers in Australia has changed over time to allow for the expansion of the subscriber base as technology has improved. The introduction of subscriber trunk dialling was slow, partly because of the distances of exchanges in some areas and partly due to the use of manual exchanges well into the 1980s. Initially, dialing codes covered a very small area, sometimes only one exchange, but gradually exchanges conglomerated to become large area codes. The length of codes varied; as early as 1971, some localities had area codes as long as seven digits, while