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.
History of telephone numbers in the United Kingdom from old 0171-0xx xxxx, 0171-1xx xxxx, 0181-0xx xxxx, and 0181-1xx xxxx "national dialling only" numbers. They are mainly used as termination points for non-geographic numbers, and for various alarm and other automated systems where the actual telephone number itself is never called. It is a common misconception that London still has more than one area code (i.e. "0207", "0208" and even "0203", which was the pre-1995 code for Coventry). This is incorrect in the sense that omitting the "0207" or "0208" (area) code will give a local number that cannot be connected as it is missing the first digit. Therefore,