The 435 area code serves rural and regional Utah – essentially the entire state outside the Wasatch Front. Created in 1997 when it split from 801, 435 covers a vast area of national parks, ski towns, and small cities from St. George in the south to Logan in the north.
Quick Summary of the 435 Area Code
| Area Code | 435 |
| State | Utah (UT) |
| Region | Rural & Regional Utah (St. George, Park City & Logan) |
| Major Cities | St. George, Logan, Park City, Cedar City, Moab, Vernal, Tooele, Heber City |
| Time Zone | Mountain Time (MT) – MST / MDT |
| Dialing Format | 7 or 10-digit dialing |
Geographic Coverage
The 435 area code covers all of Utah outside the Salt Lake City-Provo corridor, including St. George and Cedar City in the southwest, Moab in the red-rock country of the southeast, Logan in the Cache Valley to the north, Park City and Heber City in the mountains east of Salt Lake, Vernal in the Uinta Basin, and Tooele to the west. It is by far the largest area code by land area in Utah.
Time Zone
The 435 area code observes Mountain Time (MT). Clocks follow Mountain Standard Time (UTC−7) in winter and shift to Mountain Daylight Time (UTC−6) from mid-March through early November. All of Utah observes Mountain Time and, unlike neighboring Arizona, does change its clocks for daylight saving. From the West Coast, this region is one hour ahead of Pacific Time, so a 9:00 AM call in California reaches a 435 number at 10:00 AM local time.
Tip: Business hours across the 435 region generally run 9:00 AM to 5:00 PM Mountain Time, Monday through Friday.
How to Dial a 435 Number
Area code 435 is not part of an overlay, so it has traditionally allowed 7-digit local dialing. However, 10-digit dialing is now the recommended nationwide standard, and dialing the full 10-digit number (435 + the line number) always works reliably. For international callers, dial your country’s exit code, then +1 (the North American country code), then 435, followed by the seven-digit local number.
Scam Alerts for the 435 Area Code
Like every U.S. area code, 435 has been used by scammers who spoof local numbers to appear trustworthy. Residents in St. George, Logan, Park City, Cedar City, Moab, Vernal, Tooele, Heber City should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Callers impersonating the IRS and threatening arrest over supposed unpaid taxes. |
| Utility Shut-off | Fake Rocky Mountain Power callers demanding instant payment to keep your power on. |
| Vacation Rental Scam | Fraudulent Park City or Moab vacation rental listings that vanish after you pay a deposit. |
| Medicare / Health Scam | Robocalls targeting St. George retirees seeking Medicare numbers for free braces or test kits. |
If you receive a suspicious call from a 435 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the Utah Division of Consumer Protection.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (Rocky Mountain Power or Dominion Energy) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 435 caller making such a demand is a scammer.
History and Economy of the 435 Region
n
Area code 435 was created in 1997, split from 801, to serve the large rural expanse of Utah surrounding the Wasatch Front. The regional economy is powered by tourism, education, and energy. St. George is one of the fastest-growing areas in the country, a retirement and tourism hub near Zion National Park, while Moab anchors the outdoor-recreation economy around Arches and Canyonlands. Park City is a world-famous ski destination and home to the Sundance Film Festival, Logan hosts Utah State University in the agricultural Cache Valley, Cedar City is home to Southern Utah University and its Shakespeare Festival, and Vernal supports oil and gas production in the Uinta Basin.
n
Looking Up a 435 Number
n
To identify a 435 caller, use a reverse phone lookup or search the full 10-digit number online. Businesses, resorts, and government offices across rural Utah publish their 435 numbers, so a legitimate caller is often easy to confirm with a quick search. For unknown numbers, let the call go to voicemail – genuine callers usually leave a message, while robocallers and scammers rarely do.
Nearby & Related Area Codes
Utah is served by three area codes. If you are researching 435, these neighboring and overlay codes are worth knowing:
You can also browse our full directory of Utah area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Utah:
- Idaho – area code 208
- Wyoming – area code 307
- Colorado – area code 303
- New Mexico – area code 505
- Arizona – area code 602
- Nevada – area code 702
Frequently Asked Questions
Where is the 435 area code located?
The 435 area code covers rural and regional Utah outside the Wasatch Front, including St. George, Logan, Park City, Cedar City, Moab, Vernal, Tooele, and Heber City.
Does 435 have an overlay?
No. The 435 area code covers rural Utah on its own and currently has no overlay code.
Do I need to dial 10 digits for 435?
Because 435 has no overlay, 7-digit local dialing has historically worked, but dialing the full 10 digits is now the recommended standard and always works.
What time zone is the 435 area code in?
The 435 area code observes Mountain Time (MST/MDT), like all of Utah.
Related 435 Guides
- Is a 435 call safe? Read Is area code 435 a scam? Spam & safety guide.
- Local coverage: see the St. George area code guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.