Utah Area Codes
Directory of all 3 telephone area codes assigned to Utah.
Utah phone numbers are served by 3 area codes operating in the Mountain timezone.Because an overlay is active, 10-digit dialing is mandatory across much of the state. No area codes in Utah are currently flagged as high-risk scams.
Most populated prefix: area code 385 (Utah)
All Area Codes in Utah
Area Code 385
Salt Lake City, West Valley City, West Jordan, Provo, Lehi, Orem, Sandy, Ogden, South Jordan, Layton
Area Code 435
St. George, Logan, Tooele, Cedar City, Washington, Hurricane, Brigham City, Heber, Grantsville, Smithfield
Area Code 801
Salt Lake City, West Valley City, West Jordan, Provo, Lehi, Orem, Sandy, Ogden, South Jordan, Layton
Major Cities Served by Utah Area Codes
The most populous urban centers and census places covered by Utah's area codes, ranked by population.
Utah Area Code FAQs
Quick answers to common questions about Utah telephone area codes.
How many area codes does Utah have?
Utah has 3 area codes: 385, 435, 801.
What timezone do Utah area codes use?
Utah area codes operate in the Mountain timezone.
What is the most populated area code in Utah?
Area code 385 is the most populous prefix in Utah based on covered city population.
Which Utah area codes share an overlay?
385 and 801. Overlay codes serve the same area, which is why 10-digit dialing is required.
Are there scam area codes in Utah?
Utah has no area codes currently flagged as high-risk scams.
About Utah Area Codes & Phone Dialing Rules
When placing calls within Utah, ten-digit dialing (area code + 7-digit telephone number) is required in overlay regions where multiple area codes serve the same geographic boundaries.