437 area code
Toronto area, Eastern Time.Area code 437 covers Toronto in Ontario, on Eastern Time. 416 and 647 cover the same area.
Right now in Toronto
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM (Canada's CRTC rules)
Calling a lot of them? RegieGO dials up to five lines at once. See the dialer
Where 437 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 437 has 1. Each one's share is how many 437 numbers start there.
- Toronto100%
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 437 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 437 number to them, since you can't tell a work line from a personal cell.
What applies to 437Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM
- Canada (CRTC)Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PMApplies to calls to businesses too. Some provinces add rules the tool doesn't apply, like British Columbia's ban on calls on statutory holidays.CRTC Unsolicited Telecommunications Rules, Part III, s. 23 (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
437 and 416 and 647
437 went into service on March 25, 2013. 437, 416 and 647 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 437 holds 26% of the area's exchanges; 416 holds the most. Local calls take all 10 digits.
- 1947416 overlay
- 2001647 overlay
- 2013437 starts
Source: NANPA area code database
Calling a list of 437 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
437 area code FAQ
What area code is 437?
437 is an Ontario area code for Toronto.
What time zone is the 437 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 416 the same as 437?
Same area, different code. 437, 416 and 647 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 437 numbers?
Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM, local time, under Canada's CRTC rules.
When did the 437 area code start?
On March 25, 2013.
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