---
title: "Area code 435: Utah, United States"
url: "https://lookvalid.com/area-code/435.md"
canonical_url: "https://lookvalid.com/area-code/435"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 435 serves Utah, United States. Number formats, numbering rules, a live phone validator and the other codes in Utah."
---

# Area code 435: Utah, United States

Area code 435 serves Utah, United States. Number formats, numbering rules, a live phone validator and the other codes in Utah.

NANPA lists 493 central office codes (prefixes) in use in area code 435, held by 54 holders across 113 rate centers.
Verizon Wireless holds the most prefixes, 63 (13%). 64% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 1,970 complaints on file for 1,556 numbers in 435, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- 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

| 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% |

## Carriers

| 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.

## History

- 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.

## Nearest area codes

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).

## ZIP codes

91 ZIP codes fall in places that have a rate center in this area code. The places with the most are Logan, UT (4 ZIP codes), Saint George, UT (4 ZIP codes) and Park City, UT (3 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

1,970 complaints for 1,556 numbers. Numbers whose latest complaint falls in each year:

- 2023: 181
- 2024: 76
- 2025: 91

## Questions

### 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.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).