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.
Telephone numbers in Australia be allocated to switching entities physically located at a distance from the "exchange" in which their controlling computer is located. (Thus, the concept of what is a "telephone exchange" can become somewhat blurred.) Landlines use an open dialling plan: if the caller's phone shares the same area code as the called phone, the area code "may" be omitted. For example, a call from the number (02) 5551 5678, to the number (02) 7010 1111, will be connected if the caller dials only 7010 1111. Similarly, a person who dials 7010 5678 on a land-line or mobile phone in Melbourne (i.e.,