Area Code 650: Cities, Coverage, and More - area-code -

Frequently Asked Questions

Area code 650 covers several cities on the San Francisco Peninsula, including Atherton, Belmont, Daly City, Menlo Park, Mountain View, Palo Alto, Redwood City, San Bruno, San Mateo, and South San Francisco. This area is a major hub for technology and innovation in the San Francisco Bay Area.
To dial a 650 number, dial 1 + 650 + the 7-digit phone number. 10-digit dialing is mandatory for all calls, including local calls within the same area code, due to the implementation of the 988 Suicide Prevention Lifeline.
Area code 650 was created in 1997 due to the rapid growth of Silicon Valley and the subsequent increased demand for phone numbers. It was split from the existing 415 area code to provide additional numbering capacity for the region.
The area code for Palo Alto, California, is 650. This area code also covers other nearby cities like Mountain View (Google's headquarters) and Menlo Park (Facebook's headquarters).
Area code 650 is located on the San Francisco Peninsula in California, covering most of San Mateo County and parts of San Francisco and Santa Clara County. It's a major hub for the technology industry.
10-digit dialing became mandatory for area code 650 (and other area codes) in October 2021. This change was implemented nationwide by the FCC to accommodate the 988 Suicide Prevention Lifeline.
Dial your country's exit code, followed by 1, then 650, and finally the 7-digit phone number. Remember that the 1 is the country code for the United States and is necessary for all international calls.
The CPUC oversees telecommunications services within California, including the 650 area code. They manage number allocation, ensure service quality, handle consumer complaints, and promote fair competition among telecommunications providers.
Area code 650 overlays a significant economic region in California, home to many technology giants, startups, and venture capital firms. These businesses contribute substantially to the state and national economy through innovation, job creation, and investment.
Major telecommunication carriers serving the 650 area code include AT&T, Verizon, and T-Mobile (which now includes Sprint). These carriers offer a wide array of services for both individual and business customers.
Area code 650 primarily covers San Mateo County. It also extends to portions of San Francisco and the northwestern part of Santa Clara County.
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