Area Code 905

Area Code 905 is in Ontario

Other Ontario Area Codes
226, 249, 289, 343, 365, 416, 437, 519, 548, 613, 647, 705, 807, 905

Ontario Area Code Overlays
(416 and 647 and 437) - (519 and 226 and 548)
(613 and 343) - (905 and 289 and 365) - (705 and 249)


Area Code 905 History:

10/04/1993
Area code 905 was put into service. Area code 905 was created from a split of area code 416. In 2001 area code 905 was overlaid with area code 289. On March 25, 2013 area codes 905 and 289 were overlaid with area code 365.

Ten digit dialing (area code + seven digit number) is necessary in the 905/289/365 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 905 include:

Area codes 905, 289 and 365 cover a portion of southern Ontario including Niagara Falls and the Greater Toronto Area, and the larger communities of Ajax, Ancaster, Aurora, Brampton, Burlington, Caledon, Cobourg, Dunnville, Fort Erie, Georgetown, Hamilton, King Township, Maple, Markham, Milton, Mississauga, Newmarket, Oshawa, Richmond Hill, St. Catharines, Stoney Creek, Thornhill, Unionville, Welland, Woodbridge and many smaller surrounding communities in the area codes 905 and 289 overlay service area.

Ontario Area Code Map



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