Area codes 506 and 428

The Maritimes provinces (New Brunswick, Nova Scotia, Prince Edward Island) were designated as a single numbering plan area (NPA) in 1947, when the American Telephone and Telegraph Company (AT&T) published the results of the design of a new telephone numbering plan for the North American continent, that unified all existing local numbering system into what would later develop into the North American Numbering Plan, with the goal of automating the expanding toll call routing that involved many telephone operators manually relaying calls across the nations.

Since this persists until today without any overlay code, seven-digit dialing remained possible in these numbering plan areas: 709, 807, and 867 in Canada, until mid-2023.

[2] However, the projected exhaust date was delayed to December 2023 and the implementation became mandatory on April 29, 2023, at midnight.

[3] The incumbent local exchange carrier for area code 506 is Bell Aliant, which was produced from a merger that included NBTel.

Since 2005, local telephone service through Eastlink Communications has also been available in the town of Sackville.