Area code 650
Area code 650 is a telephone area code in the North American Numbering Plan for the San Francisco Bay Area in the U.S. state of California. It was split from area code 415 on August 2, 1997, and includes most of San Mateo County, part of San Francisco, and the northwestern portion of Santa Clara County including Palo Alto, Mountain View, and Los Altos.- Atherton
- Belmont
- Broadmoor
- Burlingame
- Colma
- Daly City
- East Palo Alto
- El Granada
- Emerald Lake Hills
- Foster City
- Half Moon Bay
- Highlands-Baywood Park
- Hillsborough
- Kings Mountain
- La Honda
- Ladera
- Loma Mar
- Los Trancos Woods
- Menlo Park
- Middleton Tract
- Millbrae
- Montara
- Moss Beach
- North Fair Oaks
- Pacifica
- Pescadero
- Portola Valley
- Princeton-by-the-Sea
- Redwood City
- San Bruno
- San Carlos
- San Gregorio
- San Mateo
- Sky Londa
- South San Francisco
- West Menlo Park
- Woodside
- Los Altos
- Los Altos Hills
- Loyola
- Mountain View
- Palo Alto
- Stanford
- Sunnyvale
San Francisco County
- San Francisco
