Area Code 657

California

Area code 657 serves California, primarily Anaheim, in the Pacific Time (PT) time zone. It is an overlay area code sharing territory with area code 714.

Published: February 17, 2026Verified against NANPA and FCC records

Overlay Area Code

This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.

The codes serving this same region: area code 714 (Anaheim).

With prefix utilization already at 86.5%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.

In service since: 23-Sep-2008

Learn more about overlay and split area codes →

Demographics & Economics

Total Population: 1,564,824
Population Density: 2,529 people/sq mi
above U.S. average (U.S.: 95 people/sq mi)
Median Household Income: $90,112
above U.S. median (U.S.: $80,734)
Poverty Rate: 13.2%
near U.S. average (U.S.: 12.5%)
Unemployment Rate: 7.1%
above U.S. average (U.S.: 5.2%)
Education Attainment: Bachelor's Degree+
36.9%
near U.S. average (U.S.: 35.7%)
High School or Lower
31.1%

Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.

See how this area code compares to all US area codes in the income ranking and density ranking.

Time Zone

Pacific Time (PT)

NANPA Relief Status

According to the latest NANPA analysis (July 2026), area code 657 is currently relief planning in progress.

Planning letters: PL-368, PL-206, PL-169

Source: NANPA NPA Relief Planning Reports · See all relief planning statuses

Current Time

Pacific Time (PT)

Prefix Utilization

Geographic Coverage

State

Major Cities

Anaheim
Santa Ana
Irvine
Huntington Beach
Garden Grove
Fullerton
Orange
Costa Mesa
Westminster
Buena Park
Tustin
Chino Hills
Yorba Linda
La Habra
Fountain Valley
Placentia
Cypress
Brea
La Mirada
Stanton
North Tustin
La Palma
Los Alamitos
Villa Park

and 4 more cities

Area Code 657 geographic coverage map (light mode)

Demographics

The estimated population served by area code 657 is approximately 1,564,824. The population density is 2,529 people per square mile, which is higher than the national average of 95. The median household income is $90,112, which is higher than the national median of $80,734. Approximately 36.9% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is near the national average. The poverty rate stands at 13.2%, which is near the national rate of 12.5%.

History

Area code 657 serves as an overlay for the same territory as area code 714. It was introduced in 2008 to provide additional phone number capacity for the region. It shares its territory with area code area code 714.