Space codes 514 and 438 kind an overlay advanced serving the town of Montreal with its boroughs and in addition some smaller municipalities in its quick neighborhood: Anjou, Dorval, Ile Perot, Lachine, Mont Royal and so forth.
On November 10, 2021 the brand new space code 263 was introduced by the CNA (Canadian Numbering Administrator) and scheduled to enter service on October 22, 2022 because the reduction technique for the aforementioned overlay Numbering Plan Space.
The way in which calls are dialed within the space is not altering with the activation of the brand new NPA.
See official planning letter (PDF doc).
Go to area code 263 web page for an inventory of cities served, map and different information.