About 450:
450 is the area code for off-island suburbs of Montreal, in the Canadian province of Quebec. It is also shared by small communities in an adjacent part of Ontario. In 2010, area code 450 is slated to be overlain by area code 579.
Related Cities:
Area codes 450 and 579 serve the many suburbs of Montreal including the communities of Boucherville, Chambly, Joliette, Laval, Longueuil, Varennes, Roussillon, and Saint-Hyacinthe. Montreal is served by 514 and 438.