Information About Postal Codes and Zip Codes
Area code 587 is a telephone area code that covers all of Alberta, Canada, in addition to the incumbent codes, 403 and 780. Numbers in this area code started being allocated in late 2008.
Prior to 1999, area code 403 encompassed Alberta. In January 1999, area code 780 split off from area code 403 and covered the northern half of the province. The projected exhaust date for area codes 403 and 780 was March and October 2009, respectively. In 1997, two area codes, 587 and 825, were reserved for Alberta's use by Bellcore. The new area code overlays 403 and 780 simultaneously, covering the entire province, and made 10-digit dialing necessary. As a preliminary step, optional ten-digit dialling was introduced in Alberta on 23 June 2008 and became mandatory on 12 September 2008. On 20 September 2008, Telus Mobility began allocating numbers starting with area code 587 in the Calgary area.