Area Code 403
Area code 403 covers Calgary and nearby cities including Red Deer, Lethbridge, Medicine Hat in Alberta, in the Mountain Time.
Area code 403 quick facts
| Location | Calgary, Alberta |
|---|---|
| Time zone | Mountain Time |
| In service | 1947-01-01 |
| Overlay codes | 368, 587, 825 |
| Nearby codes | 368, 587, 825, 780, 639, 306 |
| Carrier coverage | 780 prefixes; 33% wireless |
| Data current as of | August 2, 2026 |
Is a call from 403 a scam? Who called me from 403?
Cities in area code 403
Calgary, Red Deer, Lethbridge, Medicine Hat, Strathmore, High River, Canmore, Brooks, Rocky Mountain House, Crowsnest Pass, Olds, Banff
Area codes by city
Carriers in area code 403
Area code 403 spans 780 prefixes, about 33% wireless. Top carriers: TELUS COMMUNICATIONS, INC., TELUS MOBILITY CELLULAR, INC., ROGERS COMMUNICATIONS CANADA INC., BELL CELLULAR, INC.. Look up the carrier and line type for a 403 number.
Other Alberta area codes
Nearby area codes
Frequently asked questions
Where is area code 403?
Area code 403 covers Calgary and nearby cities including Red Deer, Lethbridge, Medicine Hat in Alberta, in the Mountain Time.
What cities use area code 403?
Area code 403 serves Calgary, Red Deer, Lethbridge, Medicine Hat, Strathmore, and 7 other communities in Alberta.
What time zone is area code 403 in?
Area code 403 is in the Mountain Time (America/Edmonton).
How do you dial a 403 number?
Dial all 10 digits: 403 followed by the 7-digit local number. From abroad, dial +1 403 and the local number.
Is a call from area code 403 a scam?
A 403 number is geographically tied to Alberta, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.
Is 403 a country code?
No. 403 is a Canadian area code (a domestic 3-digit code), not a country code. The country (calling) code for Canada is +1, shared across the North American Numbering Plan. So a full 403 number written for international dialing looks like +1 403 followed by the 7-digit local number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.