West region · Mountain Time
Utah Area Codes
All 3 area codes serving Utah, the cities each one covers, and which are overlays. Utah is served by 3 area codes in the Mountain Time zone.
Last updated October 3, 2026
Full list
Every Utah area code
Utah is served by 3 area codes in the Mountain Time zone. 1 of these are overlay codes layered over busy metros; the rest are geographic codes.
| Code | Area served | Type | In service |
|---|---|---|---|
| 385 | Utah's Wasatch Front, from Ogden through Salt Lake City to Provo | Overlay | Since 2009 |
| 435 | All of Utah outside the Wasatch Front, including St. George, Logan and Park City | Geographic | Since 1997 |
| 801 | Utah's Wasatch Front, from Ogden through Salt Lake City to Provo | Geographic | Since 1947 |
Area codes and dialing in Utah
Utah's 3 area codes mix older geographic codes with newer overlays. The busiest metros — around Salt Lake City, St. George — carry the most numbers and rely on overlays, which is why 10-digit dialing is required there. Quieter parts of the state may still use a single code. The oldest code in Utah is 801 (Salt Lake City), one of the original 1947 area codes.
Whenever a Utah region runs low on numbers, a new overlay is added on top rather than splitting the map, so existing customers keep their numbers. See 10-digit dialing for what that means in practice, or the newest area codes for upcoming changes.
Utah city area code pages
Look up the area codes for a specific Utah city: Salt Lake City · Provo.
Browse Utah another way
Explore by West region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Utah area code FAQ
How many area codes does Utah have?
Utah currently has 3 area codes: 385, 435, 801.
What is the main area code for Utah?
Utah has no single main code. Its original 1947 area code was 801; today the main cities are served by 801 (Salt Lake City), 435 (St. George), 385 (Salt Lake City).
Does Utah require 10-digit dialing?
Yes, in its overlay areas you must dial all 10 digits, even for local calls. Dialing all 10 digits always works, so it is the safe habit.