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 June 5, 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 | Main city | Type | Status |
|---|---|---|---|
| 385 | Salt Lake City | Overlay | In service |
| 435 | St. George | Geographic | In service |
| 801 | Salt Lake City | Geographic | In service |
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 original code in the Utah list is 385 (Salt Lake City).
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.
Cities with multiple area codes
These Utah metros are served by an overlay of two or more codes, so 10-digit dialing applies: Salt Lake City.
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?
The busiest metro in Utah is served by the 385 code. Major cities include Salt Lake City, St. George.
Does Utah require 10-digit dialing?
Yes, in its overlay metros you must dial all 10 digits. Ten-digit dialing is the national standard.