Area code 450 surrounds the island of Montreal, serving the suburbs and regions of southwestern Quebec, including Laval, Longueuil, and Saint-Jérôme. Created in 1998 from a split of 514, it was the first major step in handling the Greater Montreal Area’s population growth. In 2010, it was overlaid with area code 579, introducing ten-digit dialing to the region. The 450 area includes a mix of residential suburbs, industrial zones, and recreational areas. It’s an essential part of the telecom infrastructure for the communities surrounding Montreal and a widely used regional identifier.