Area code
435
435 is a United States area code. Under the North American Numbering Plan it belongs to Utah, which has 3 area codes in total.
Validate a number in 435
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 435 at a glance
NANPA lists 493 central office codes (prefixes) in use in area code 435, held by 54 holders across 113 rate centers.
| Fact | Value |
|---|---|
| In service since | 1997-09-21 |
| Time zone | Mountain (M) |
| Prefixes in use | 493 |
| Pooled prefixes | 314 (64%) |
| Rate centers | 113 |
| Companies holding prefixes | 54 |
| Assignment dates on file | 2001-02-02 to 2025-12-03 (186 prefixes) |
| ZIP codes in its places | 91 |
Rate centers in area code 435
| Rate center | Prefixes | Share |
|---|---|---|
| ST GEORGE | 52 | 11% |
| LOGAN | 45 | 9% |
| PARK CITY | 32 | 6% |
| TOOELE | 30 | 6% |
| BRIGHAM CY | 23 | 5% |
| CEDAR CITY | 22 | 4% |
| HEBER CITY | 13 | 3% |
| RICHFIELD | 10 | 2% |
| 105 other rate centers | 266 | 54% |
Who holds the prefixes in 435
Verizon Wireless holds the most prefixes, 63 (13%). 64% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Verizon Wireless | 63 | 13% |
| Qwest | 58 | 12% |
| New Cingular Wireless PCS | 55 | 11% |
| Onvoy | 43 | 9% |
| T-Mobile USA | 41 | 8% |
| Frontier Comm Of Ut | 28 | 6% |
| 48 other carriers | 205 | 42% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 435
- 1947-01-01 Area code 801, named as the parent of 435 in the NANPA report, was in service.
- 1997-09-21 Area code 435 went into service.
Area codes nearest to 435
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
ZIP codes in area code 435
91 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Logan, UT | 4 |
| Saint George, UT | 4 |
| Park City, UT | 3 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 435 numbers
1,970 FCC complaints are on file for 1,556 numbers in 435, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 181 |
| 2024 | 76 |
| 2025 | 91 |
Other area codes in Utah
Utah is one state with 3 area codes in the NANPA table. 435 is one of them.
Next to 435 in the numbering table
These are the codes just before and after 435 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 435 was first assigned in Utah. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Utah next to a 435 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 435
Where is area code 435?
NANPA assigns area code 435 to Utah, United States.
In which state does area code 435 sit?
Utah. 435 is one of 3 area codes the NANPA table assigns to the state.
Which places does area code 435 cover?
The places with the most ZIP codes among the rate centers in 435 are Logan, UT, Saint George, UT and Park City, UT. The rate center list on this page shows all of them.
Who owns area code 435?
NANPA assigns area codes. Within 435, Verizon Wireless holds the most prefixes, 63 prefixes or 13%.
Which time zone does 435 use?
The NANPA NPA report lists the time zone for 435 as Mountain (M).
What year did 435 enter service?
The NANPA NPA report gives an in-service date of 1997-09-21, so 435 has been in use since 1997.
Does area code 435 have an overlay?
The NANPA NPA report lists no other area code in an overlay with 435.
Which area codes are nearest to 435?
The area codes closest to 435, measured between the centers of the ZIP code places they serve, are 385 (about 102 miles), 801 (about 102 miles), 702 (about 290 miles), 725 (about 291 miles) and 970 (about 302 miles).
How many prefixes does area code 435 have?
NANPA's report dated 2026-10-17 lists 493 prefixes in service in 435, spread over 113 rate centers and 54 holders.
Are there complaints about 435 numbers?
The FCC data on file has 1,970 complaints for 1,556 numbers in 435. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.