437 area code: Toronto

Updated: 10/16/2026

437 is the area code for Toronto. Phone numbers with this area code are written as (437) XXX-XXXX.

437 area code - Toronto

Area code	437
Area	Toronto
State or region	Ontario, Canada
Time zone	Eastern Time (ET)
Number format	(437) XXX-XXXX
International format	+1 437-XXX-XXXX

This is a Canadian area code. Calls between the US and Canada are dialed like domestic calls (1 + 10 digits), but some US phone plans charge them as international calls. Overlay: the same area is also served by area codes 416, 647 and 942, so local calls need all 10 digits.

An area code does not prove where the caller is. People keep their number when they move or switch carriers, internet phone (VoIP) services hand out numbers in any area code, and scammers often fake a local area code (neighbor spoofing) to get you to pick up.

Missed call from a number starting with 437 - what to do

Look up the full number in the search below to see reviews and reports from other people.
Never read out one-time passcodes, card details or online banking passwords over the phone. No real bank, government agency or police department will ask you to move money to a "safe account" or pay with gift cards.
Forward spam texts to 7726 (SPAM) for free and report scams to the FTC at reportfraud.ftc.gov. Internet-based fraud can also be reported to the FBI at ic3.gov.

Other area codes in Ontario, Canada

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437 area code: Toronto