British Columbia is currently using three area codes. British Columbia has had one area code split and one area code overlay plan, often called an overlay complex.
Area code 604 originally covered all of British Columbia. This was sufficient for forty-nine years until 1996 when British Columbia experienced sufficient growth in population and telephone use to need an additional area code. To meet the demand area code 604 was split to form 250. The growth in British Columbia continued especially in the Greater Vancouver area, as well as, Abbotsford and Mission. To meet this continuing demand for new telephone numbers area code 778 was introduced as a concentrated overlay of those areas. In 2008 area code 778 was expanded to cover all of area code 604 and 250.
Changes and History of British Columbia Area Codes:
Area code 604 was put into service. In 1996 area code 604 was split to form area code 250. In 2001 area code 604 was partially overlaid with area code 778. In 2008 the overlay was expanded to include all of area code 604 and area code 250.
Area code 250 was put into service. Area code 250 was created from a split of area code 604. In 2008 area code 250 was overlaid with area code 778.
Area code 778 was put into service. Area code 778 is an overlay of area codes 604 and 250. In 2008 the overlay pattern was expanded to cover all of area codes 604 and 250.
Area code 236 was put into service. Area code 236 is an overlay of area codes 250, 604, and 778. The new overlays are 604/778/236 and 250/778/236.