<P> Area code 780 is a telephone area code in the province of Alberta, encompassing the northern two - thirds of the province, including the Edmonton area . The code was established in 1999; prior to this date the entire province was served by the 403 area code . The 780 phone code started use on January 25, 1999 . Permissive dialing of 403 continued throughout Alberta until May 18, 1999 . Area code 780 is also the last new area code in Canada introduced by a split . </P> <P> Mandatory provincewide 10 - digit dialing began on September 12, 2008 . This change was done to accommodate area code 587, which had been implemented as a provincewide overlay . </P>

Where is area code 780 located in canada