Where Is Area Code 650?
Area code 650 serves California’s San Francisco Peninsula. The region lies south of San Francisco and north of San Jose. It includes most of San Mateo County and parts of northern Santa Clara County.
Daly City is the primary city associated with area code 650. Other major cities include San Mateo, Redwood City, South San Francisco, Palo Alto, Menlo Park, Mountain View, and Pacifica.
The 650 region includes both San Francisco Bay shoreline and Pacific Ocean coastline. Notable places include San Francisco International Airport, Stanford University, Pacifica, and Half Moon Bay.
Cities and Communities in the 650 Area Code
- Atherton, San Mateo County
- Belmont, San Mateo County
- Colma, San Mateo County
- Daly City, San Mateo County
- East Palo Alto, San Mateo County
- Foster City, San Mateo County
- Half Moon Bay, San Mateo County
- Hillsborough, San Mateo County
- Los Altos, Santa Clara County
- Los Altos Hills, Santa Clara County
- Menlo Park, San Mateo County
- Millbrae, San Mateo County
- Mountain View, Santa Clara County
- Pacifica, San Mateo County
- Palo Alto, Santa Clara County
- Portola Valley, San Mateo County
- Redwood City, San Mateo County
- San Bruno, San Mateo County
- San Carlos, San Mateo County
- San Mateo, San Mateo County
- South San Francisco, San Mateo County
- Woodside, San Mateo County
History of Area Code 650
Area code 650 entered service on August 2, 1997, after a split from area code 415. The split assigned most of San Mateo County and parts of northern Santa Clara County to the new 650 area, while San Francisco continued using 415.
Before 1997, area code 415 covered a much larger part of the San Francisco Bay Area. The split created additional numbering capacity for the Peninsula as residential, business, and technology-related telephone use increased. Area code 650 was established as a geographic area code, not as a toll-free code or an overlay code.
Key Facts About Area Code 650
- Area code 650 is a geographic telephone area code in California.
- Daly City is the primary city associated with area code 650.
- Area code 650 is located in the U.S. Census Pacific region.
- Area code 650 uses Pacific Time.
- Area code 650 entered service on August 2, 1997, after a split from area code 415.
- Most of the area code’s coverage lies in San Mateo County, with additional coverage in northern Santa Clara County.
- San Mateo County had 764,442 residents in the 2020 U.S. Census; area code 650 also covers part of Santa Clara County.
- The area code includes Stanford University and San Francisco International Airport.
Frequently Asked Questions
What state is area code 650 in?
Area code 650 is in California.
What major cities use area code 650?
Major cities using area code 650 include Daly City, San Mateo, Redwood City, South San Francisco, Palo Alto, Menlo Park, Mountain View, and Pacifica.
What time zone is area code 650 in?
Area code 650 is in Pacific Time.
Is area code 650 a toll-free number?
No, area code 650 is a geographic area code.