Area Code Atlas

Area code 801 introduced for Utah

In 1947, area code 801 was introduced as one of the original North American area codes, covering the entire state of Utah.

NANP- Split of 801 (Utah) Numbering Plan Area (NPA)

NPA 435 created from 801

Area code 435 was created in September 1997 when it split from area code 801, which was geographically reduced to serve the Wasatch Front in Utah. The new code covers most of the state outside the Salt Lake City region.

Extension of Permissive Dialing Period for Utah 801 and 435 NPA Relief; Reference PL-NANP-065

801 NPA Split, Creating 385 NPA (Utah)

801 NPA Split Delayed (Utah)

Planned split of 801 to create 385

A split was approved by the Public Service Commission of Utah to relieve area code 801 by creating area code 385 for the Wasatch Front outside Salt Lake County, originally planned for 2001 but postponed.

801 NPA; 2-way Split Creating 385, Delayed until March 2005 (Utah)

Utah 801-385 Split Suspended

Overlay relief plan selected for 801 with 385

On July 12, 2007, the Public Service Commission of Utah issued an order selecting an area code overlay for the 801 area code, reversing a previous split order. The overlay would introduce area code 385 to the same geographic region as 801.

NPA 385 overlay on 801 announced

NPA 385 to Overlay NPA 801 (Utah)

NPA 385 overlay on 801 announced

NPA 385 to Overlay NPA 801 (Utah)

Area code 385 overlays 801

On June 1, 2008, area code 385 was activated as an overlay for the 801 area code, serving the same geographic region in the Wasatch Front. This allowed new telephone numbers to be assigned with the 385 area code while existing 801 numbers remained unchanged.

Permissive 10-digit dialing begins for 801/385

Permissive 10-digit dialing began on June 1, 2008, for the 801 and 385 area codes in the Wasatch Front. During this period, both 7-digit and 10-digit dialing were allowed for local calls.

Area code 385 overlay activated

Area code 385 was activated as an overlay to area code 801 on June 1, 2008, serving the same geographic area along the Wasatch Front and allowing existing 801 numbers to be retained.

Mandatory 10-digit dialing for 801/385

On June 1, 2009, mandatory 10-digit dialing was implemented for all calls within the 801 and 385 area codes in the Wasatch Front, requiring callers to use the area code for all local calls.