Ontario Area Codes
Complete directory of all 16 active area codes serving Ontario, Canada. Population: 15,996,389 (2023 Statistics Canada estimate).
About Area Codes in Ontario
Ontario (ON) is a Canadian province in the Central Canada region. With a 2023 Statistics Canada population estimate of 15,996,389 residents, Ontario is served by 16 active area codes: 226, 249, 289, 343, 365, 416, 437, 519, 548, 613, 647, 705, 742, 753, 807, 905. The provincial capital is Toronto and the largest city is Toronto.
Canadian area code assignments are managed by the Canadian Numbering Administrator (CNA) under the broader North American Numbering Plan (NANP). As Ontario's population and demand for phone numbers grew — driven by cell phones, VoIP lines, and pagers — regulators either split existing area codes or added overlay codes that share territory with the original.
Ontario observes the Eastern and Central time zones. Most of Canada observes Daylight Saving Time from the second Sunday in March through the first Sunday in November, except parts of Saskatchewan which stays on Central Standard Time year-round.
When you receive a call from a Ontario number, the area code tells you only where the number was originally assigned. Because of Local Number Portability (LNP), Canadian callers can keep their phone numbers when moving across provincial lines — so a 226 number is no longer a guarantee the caller is physically in Ontario.
Phone number format in Ontario
All Ontario phone numbers follow the standard 10-digit NANP format: (NPA) NXX-XXXX. For local calls within Ontario, 10-digit dialing is mandatory because of overlay codes. For long-distance calls within Canada or to the US, dial 1 + area code + 7-digit number. From outside North America, dial your international access prefix, then 1 (the NANP country code), then the 10-digit number.
Frequently asked questions about Ontario area codes
How many area codes does Ontario have?
Ontario currently has 16 active area codes: 226, 249, 289, 343, 365, 416, 437, 519, 548, 613, 647, 705, 742, 753, 807, 905.
What time zone is Ontario in?
Ontario observes the Eastern, Central time zones.
What is Ontario's capital?
The capital of Ontario is Toronto. The largest city is Toronto.