Area Code 650

California

Area code 650 serves California, primarily San Mateo, in the Pacific Time (PT) time zone. It was created from a split of area code 415.

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

Split Area Code

This area code exists because its parent region ran low on available numbers: the parent territory was divided geographically, this code took over one part of it, and the parent kept serving the rest. Existing customers generally keep their numbers — only the code changes for the newly drawn region.

This area code was split from area code 415 (San Francisco).

In service since: 02-Aug-1997

Learn more about overlay and split area codes →

Demographics & Economics

Total Population: 960,395
Population Density: 1,604 people/sq mi
above U.S. average (U.S.: 95 people/sq mi)
Median Household Income: $158,855
above U.S. median (U.S.: $80,734)
Poverty Rate: 6.8%
below U.S. average (U.S.: 12.5%)
Unemployment Rate: 4.8%
near U.S. average (U.S.: 5.2%)
Education Attainment: Bachelor's Degree+
54.4%
above U.S. average (U.S.: 35.7%)
High School or Lower
20.4%

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), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.

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

Current Time

Pacific Time (PT)

Prefix Utilization

Geographic Coverage

State

Major Cities

San Mateo
Daly City
Redwood City
Mountain View
Palo Alto
South San Francisco
San Bruno
Pacifica
Foster City
Menlo Park
Los Altos
Burlingame
San Carlos
East Palo Alto
Belmont
Millbrae
Stanford
North Fair Oaks
Half Moon Bay
Hillsborough
Los Altos Hills
Atherton
El Granada
Woodside

and 17 more cities

Area Code 650 geographic coverage map (light mode)

History

Area code 650 was created from a split of area code 415. It was introduced in 1997 as part of a geographic division to provide additional numbering resources.

Demographics

The estimated population served by area code 650 is approximately 960,395. The population density is 1,604 people per square mile, which is higher than the national average of 95. The median household income is $158,855, which is higher than the national median of $80,734. Approximately 54.4% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is higher than the national average. The poverty rate stands at 6.8%, which is lower than the national rate of 12.5%.