Located in the Eastern (GMT -05:00) time zone. Area codes 514 and 438. Area codes 514 and 438 are the telephone area codes for Montreal and most of its on-island suburbs. They cover the Island of Montreal, Île Perrot, and Île Bizard in the province of Quebec. The main area code, 514, was one of the 86 original North American Numbering Plan Areas defined in 1947.