Alberta is currently using three area codes. Alberta has had two area code splits and one area code overlay plan, often called an overlay complex.
Area code 403 originally covered not only Alberta but also Yukon and parts of the Northwest Territories. In 1997 area code 403 was split, along with area code 819, to form area code 867 which covers Yukon, Northwest Territories and Nunavut. In 1999 area code 403 was split again to form area code 780. In 2008 area code 587 was put into service as an area code overlay of area codes 403 and 780.
Today area code 403 covers the southern portions of Alberta including Calgary, Airdrie, Banff, Brooks, Canmore, Claresholm, Crowsnest Pass, High River, Medicine Hat, Olds, Lethbridge, Red Deer, Rocky Mountain House and Strathmore. Area code 780 covers the northern portions of Alberta including Edmonton, Bonnyville, Camrose, Drayton Valley, Fort McMurray, Fort Saskatchewan, Grande Prairie, Jasper, Lloydminster (Alberta portion), Peace River, Saint Albert, Sherwood Park, and Wetaskiwin. Area code 587 overlays the entire province.
Changes and History of Alberta Area Codes:
Area code 403 was put into service.
Area code 403, along with area code 819, was split to form area code 867 which serves Nunavut, Northwest Territories and Yukon.
Area code 780 was put into service. Area code 780 was created from a split of area code 403.
Area code 587 was put into service. Area code 587 is an overlay of area codes 403 and 780.