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Area code 289 covers the Golden Horseshoe region that surrounds Lake Ontario in Southern Ontario, Canada. The area includes the Niagara Peninsula, the city of Hamilton, the regional municipalities of Halton, Peel, York, Durham, and parts of Northumberland County. It surrounds the city of Toronto.
The 289 area code is part of an overlay system in the Golden Horseshoe region. It shares the same geographic area with area codes 905, 365, and 742. Area code 905 was established in October 1993. Area code 289 was overlaid on June 9, 2001, requiring ten-digit dialing for all local calls. Area code 365 was introduced on March 25, 2013, and area code 742 was added on October 16, 2021.
Area code 289 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 289 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Ontario geographic region, and local calling area associated with the phone number.
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