The 435 area code covers Saint George, Logan and 88 more places in Utah.
Area code 435 is in Utah, on Mountain Time. In the 435 area, phone numbers are given out most in Washington County, then Cache and Box Elder counties. It has been in service since September 21, 1997.
- Where
- 8 counties in Utah, mostly Washington County, Cache County and Box Elder County
- Time zone
- Mountain Time
- In service since
- September 21, 1997
- Shares its area with
- No other area code
- Prefixes in use
- 501
- How to dial
- Local calls inside 435 can still be dialed with just 7 digits.
Find out who called you from a 435 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (435) number is on today, use our free carrier lookup.
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Saint George holds 11% of the phone prefixes in area code 435.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 501 prefixes in use shows where 435 numbers are actually given out.
- Saint George53 prefixes, 11%
- Logan45 prefixes, 9%
- Park City32 prefixes, 6%
- Tooele30 prefixes, 6%
- Brigham City23 prefixes, 5%
- Cedar City22 prefixes, 4%
- Heber City13 prefixes, 3%
- Richfield10 prefixes, 2%
Also served: Price, Vernal, Nephi and Castle Dale and 78 smaller places.
Of the carriers named here, Qwest (Lumen) holds the most phone number prefixes in area code 435: 58 of 501.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 501 prefixes in use in 435 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Qwest (Lumen)Lumen's landline company | 58 | 12% |
| AT&T MobilityMobile network | 55 | 11% |
| T-MobileMobile network | 41 | 8% |
| FrontierLandline company | 28 | 6% |
| South Central Utah Telephone Association | 24 | 5% |
| Level 3 (Lumen)Lumen's business and wholesale network | 23 | 5% |
| 46 other carriers | 272 | 54% |
64% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
435 has covered the same ground since 1997.
1997
435 starts on September 21, 1997, split off from 801.
A 435 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 435 are 801.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
These are the questions people ask most about area code 435.
Where is area code 435?
435 covers Saint George, Logan, Park City and Tooele and 86 more places in Utah. In the 435 area, phone numbers are given out most in Washington County, then Cache and Box Elder counties.
What state is area code 435 in?
Utah. 435 is a Utah area code on Mountain Time.
What cities use area code 435?
The places holding the most 435 prefixes are Saint George, Logan, Park City, Tooele, Brigham City, Cedar City, Heber City and Richfield, out of 90 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 435?
No single phone company owns 435. NANPA's records list its 501 prefixes across many carriers, and the ones named on this page include Qwest (Lumen), AT&T Mobility and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 435 in?
435 is on Mountain Time.
When did area code 435 start?
435 went into service on September 21, 1997, when it was split off from 801.
How do I dial a 435 number?
Local calls inside 435 can still be dialed with just 7 digits.
Is 435 a toll-free number?
No. 435 is a regular area code for Saint George and Logan in Utah, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 435?
The closest are 801/385 (Salt Lake City, Utah), measured between the centres of each area.
Who called me from a 435 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 435 a scam?
435 is a real Utah area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.