TORONTO — Starting October 16, 2021, the new area code 742 will be introduced in the Golden Horseshoe region (excluding Toronto) which is currently served by area codes 289, 365 and 905.
This region includes Niagara, Hamilton, Halton, Peel, York and Durham. The introduction of the new 742 area code is the result of an October 2020 decision by the CRTC and is intended to meet the continuously growing demand for new telephone numbers in the region.
The new area code will be introduced gradually starting October 16. After this date, consumers and businesses requesting a new phone number may receive one with the new 742 area code. Numbers with the new area code will be assigned to customers only when there is no longer a sufficient supply of numbers with the three existing area codes.
The 905 area code was first introduced to serve the area surrounding Toronto in 1993, followed by area code 289 in 2001 and area code 365 in 2013.
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