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.
Dialling (telephony) Dialling (telephony) Dialling, (dialing in US English), is the action of initiating a telephone call by operating the rotary dial or the telephone keypad of a telephone. Prior to Strowgers invention of SXS, rotary switch in 1891, telephone connections involved cranking a handle to generate a voltage that operated a bell on the remote operator's board; the operator would then on the line to the subscriber and speak to them, they would then raise a voltage on the recipients phone, alerting them of an incoming call. When this was acknowledged, the operator would patch the two subscribers together using a