Area code 403

Area code 403 is the telephone area code in the Canadian province of Alberta, encompassing the southern half of the province.

Prior to 1997, the 403 area code encompassed the whole province of Alberta, the Yukon and the western half of the Northwest Territories. The territories were given their own separate area code, 867, in 1997. In 1999, the northern half of Alberta was split into the new area code 780.

The main city served by the 403 area code is Calgary.