Area Code 742 — Ontario
This is a Canadian area code
Area code 742 is located in Ontario, Canada. Canada shares the North American Numbering Plan (NANPA) with the US, so Canadian numbers use the same 10-digit format. Calls between the US and Canada may or may not be included in your plan — check with your carrier, as international rates can apply.
Area code 742 is located in Ontario, Canada and operates on Eastern Time . The largest city served is Hamilton . View all Canadian area codes →
Area Code Details
- Area Code
- 742
- State / Province
- Ontario (ON)
- Country
- Canada
- Time Zone
- Eastern Time Eastern Time
- Local Time Now
- —
- Status
- Active
- Code Type
- General Purpose Code
- In Service Since
- October 16, 2021
- Assigned
- October 28, 2020
- Population Served
- ~1,710,528 est.
- Overlay Complex
- 289/365/742/905
Cities Served
History & Relationships
Split from
905Overlay complex — shares geography with
Rate Centers & Exchanges
14 rate centers identified within area code 742
Other Area Codes in Ontario
View all →Nearby Area Codes
Frequently Asked Questions About Area Code 742
What state is area code 742?
Area code 742 is located in Ontario.
Where is area code 742 from?
Area code 742 originates from Ontario. It operates in the Eastern Time zone.
What time zone is area code 742?
Area code 742 falls within the Eastern Time zone (Eastern Time).
What cities are in area code 742?
Area code 742 serves cities including Hamilton, Markham, Richmond Hill, Burlington, Oshawa, Whitby, Niagara Falls, St Catharines-Thorold, and more.
Is a call from area code 742 a scam?
Area code 742 is a legitimate Canadian area code serving Ontario. Like any area code, individual numbers using 742 can be used for scam calls. Note that calls from 742 are international calls from Canada — unexpected calls may incur charges. Always verify the specific number if you receive an unexpected or suspicious call.