Area Code 416 History:
Area code 416 was put into service. In 1953 area code 416, along with area code 613, was split to form area code 519. In 1993 area code 416 was split to form area code 905. In 2001 area code 416 was overlaid with area code 647. On March 25, 2013 area codes 416 and 647 were overlaid with area code 437.
Ten digit dialing (area code + seven digit number) is necessary in the 416/647/437 overlay because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
Major cities or places in Ontario within area code 416 include:
Area codes 416 and 647 serve the City of Toronto. The surrounding suburbs are served by area code 905.