Utah area codes

Codes in service in Utah

Utah has 3 geographic area codes in service: 385, 435, 801. 801 is the oldest, dated 1947, and 385 the newest, dated 29 Mar 2009.1 All of Utah's codes are on Mountain time.

Area code	NANPA location	NPA in-service date	In-service overlay peers	Time zone	Local calls within the code
385	UT	29 Mar 2009	801	Mountain	10 digits
435	UT	21 Sep 1997	None listed	Mountain	7 digits
801	UT	1947	385	Mountain	10 digits

Scroll the table sideways to see every column. Sources: NANPA (14 October 2026 file).

History and overlays in Utah

Before 1960: 801 (1947)
1990s: 435 (21 Sep 1997)
2000s: 385 (29 Mar 2009)

Utah's in-service overlay group is 385/801.1

385/801: 801 (1947) was joined by 385 on 29 Mar 2009.

Dialing in Utah

Local calls within a single area code in Utah differ: 7 digits for 435; 10 digits for 385, 801. In Utah, local calls to other area codes differ: 7 digits for 435; 10 digits for 385, 801.1 Seven-digit local dialing is still recorded for 435.

Neighbours of Utah

Regions that border Utah:

Arizona: 5 codes (480, 520, 602, 623, ...)
Colorado: 6 codes (303, 719, 720, 748, ...)
Idaho: 2 codes (208, 986)
Nevada: 3 codes (702, 725, 775)

Rules that apply to every region are on the area-code reference.

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Sources

Every regulatory and pricing claim on this page links to the primary source it came from. Figures were checked on the date shown at the top of the page; rules and prices change, so verify before relying on one.

NANPA, NPA Database CSV, file dated 14 October 2026; US geographic codes, location, dates, overlay complexes, dialing plan and time zone. Retrieved 14 Oct 2026
https://reports.nanpa.com/public/npa_report.csv