Canadian Area Codes / Alberta
The 403 area code
The 403 area code covers Calgary and southern Alberta, Canada.
Province
Alberta
Time zone
Mountain Time
Country
Canada (+1)
Cities in the 403 area code
Major communities served by 403 include:
Overlay codes for this area
The 403 region shares its territory with these codes — which is why you dial all 10 digits for local calls:
Dialing a 403 number
Within Canada and the United States, dial all ten digits — 403 plus the seven-digit number. Ten-digit dialing is required here because 403 shares its territory with 587, 825, 368. From outside North America, dial +1 403 and then the number.
Is a 403 call spam?
The 403 area code is a legitimate code for Calgary and southern Alberta — it isn't a scam on its own. But because scammers can spoof caller ID to display any area code, an unexpected 403 call isn't guaranteed to be local or genuine. When in doubt, let it go to voicemail and call back using a number you trust.
Want a local 403 number for your business?
Voiswitch provides local 403 numbers on business phone systems — or ports the one you already have. Free quote, no obligation.
403 area code — questions
Where is the 403 area code?
The 403 area code is in Alberta, Canada. It covers Calgary and southern Alberta, including Calgary, Lethbridge, Medicine Hat, Red Deer.
What time zone is the 403 area code in?
403 numbers are in the Mountain Time zone.
Is the 403 area code a scam?
No — 403 is a legitimate geographic area code assigned to Calgary and southern Alberta in Alberta. The code itself isn't a scam. That said, scammers can spoof any area code (including 403) to make a call look local, so an unexpected 403 call isn't guaranteed to be genuine or nearby. Treat unsolicited calls with the usual caution no matter what area code shows.
How do you dial a 403 number?
Within Canada and the US, dial all ten digits — 403 followed by the seven-digit number (ten-digit dialing is required because 403 overlaps with 587, 825, 368). From outside North America, dial +1 403 and then the number.
Is 403 an overlay area code?
The 403 area shares the same territory as 587, 825, 368. Because multiple codes overlap, you dial all 10 digits for local calls.
Can I get a 403 number for my business?
Yes — Voiswitch can provide local 403 numbers, and if you already have one, we can port it to your new phone system. Get a free quote to add a local 403 number.