Utah · Mountain Time
435 Area Code
Area code 435 is in Utah, serving all of Utah outside the Wasatch Front, including St. George, Logan and Park City. It is in the Mountain Time zone.
Last updated October 1, 2026 · Source: NANPA
Where is the 435 area code?
435 is a Utah area code covering all of Utah outside the Wasatch Front, including St. George, Logan and Park City. In the wider directory it sits in the West region.
Cities in the 435 area code
- St. George
- Logan
- Cedar City
- Hurricane
- Washington
- Tooele
- Park City
- Brigham City
- Heber City
- Vernal
- Price
- Moab
- Richfield
Counties served by 435
Washington County, Cache County, Iron County, Summit County, Tooele County, Box Elder County, Uintah County, Grand County, Carbon County and Sevier County.
Dialing 435
St. George, UT is currently served by the single area code 435, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.
From outside the US, dial +1 435 followed by the seven-digit number.
History of the 435 area code
435 went into service on September 21, 1997, created when it was split from 801. It serves St. George and the surrounding part of Utah. For how codes are created, split, and overlaid, see how area codes work.
Is 435 a scam or spam risk?
435 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 435 number on your screen is no guarantee the caller is in St. George, UT or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in Utah, compare codes across the West region, or view all Mountain Time codes. You can also browse the 4XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
435 area code FAQ
Where is the 435 area code?
The 435 area code is in Utah, covering all of Utah outside the Wasatch Front, including St. George, Logan and Park City, in the West region.
What cities are in the 435 area code?
Cities in the 435 area code include St. George, Logan, Cedar City, Hurricane, Washington, Tooele, Park City, Brigham City, Heber City and Vernal.
What time zone is 435 in?
435 is in the Mountain Time zone.
When did the 435 area code start?
435 went into service on September 21, 1997.
Do I have to dial 10 digits for 435?
Ten-digit dialing always works, and many areas now require it; some local calls in this area may still connect with seven digits.
Is 435 a toll-free or premium code?
No. 435 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.