Utah Area Codes

Area codes: 3
ZIP codes: 347
Cities & towns: 251
Counties: 29

Every area code in Utah

All Utah area codes, what each primarily serves, and which share ground with another.
Area code	Primarily serves	Shares ground with	In service
385	Salt Lake City	801	2009
435	Logan	no overlay	1997
801	Salt Lake City	385	1947

A code in the “shares ground” column is an overlay: it covers the same territory rather than a different part of Utah, which is why local calls there are dialled as ten digits.

Which codes share the same ground

Utah has 1 group of codes that overlay one another: the codes inside a group cover the same territory rather than different parts of the state, so local calls there are dialled as ten digits.

385 801

435 has no overlay: it is the only code serving its territory.

Where Utah's communities sit

Each point is a Utah community, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Largest Utah cities and their codes

largest 25

Scope every area code assigned to Utah. Source LocalCallingGuide NPA list (2026-07 NPA list) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. Overlay relationships come from the numbering-plan authority; the city match is computed.