Area code 650

Numbering plan areas in California (blue) and border states.Area code 650 is shown in red.

Area code 650 is a telephone area code in the North American Numbering Plan (NANP) 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 (except the northernmost portion), part of San Francisco, and the northwestern portion of Santa Clara County including Palo Alto, Mountain View, and Los Altos.

Service area

San Mateo County

• Atherton
• Belmont
• Broadmoor
• Burlingame
• Colma
• Daly City (small portion in 415)
• 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

Santa Clara County

• Los Altos
• Los Altos Hills
• Loyola
• Mountain View
• Palo Alto
• Stanford
• Sunnyvale (western edge)

San Francisco County

• San Francisco

External links

• "Area Code Maps". NANPA.

• 650 Area Code

California area codes: 209/350, 213/323, 310/424, 408/669, 415/628, 510/341, 530, 559, 562, 619/858, 626, 650, 661, 707/369, 714/657, 760/442, 805/820, 818/747, 831, 909/840, 916/279, 925, 949, 951

	North: 415/628
West: Pacific Ocean, 808	area code 650	East: 510/341, 925
	South: 408/669, 831
Hawaii area codes: 808