Area codes 514 and 438 are telephone area codes of the North American Numbering Plan (NANP) for Montreal and most of its on-island suburbs, specifically the Island of Montreal, Île Perrot, and Île Bizard, in the Canadian province of Quebec. Area code 514 was one of the original area codes assigned by AT&T in 1947. The original numbering plan area (NPA) was split twice, in 1957 to create area code 819, and in 1998 to create area code 450. In 2006, the entire remaining 514 area was assigned a second area code, 438, in an overlay plan, making ten-digit dialing mandatory in the Montreal area.