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650 Area Code

Area code 650 serves San Mateo, Daly City, Mountain View, Redwood City, Palo Alto and nearby communities in California. It has been in service since August 2, 1997, when it was split from 415.

StateCalifornia
Time zonePacific
Local time now…
Prefixes in use717
Projected to run out2039
San MateoDaly CityMountain ViewRedwood CityPalo AltoSouth San FranciscoNewarkSan BrunoPacificaMenlo ParkFoster CityBurlingameLos AltosSan CarlosEast Palo AltoBelmontMillbraeStanfordNorth Fair OaksHalf Moon BayHillsboroughLos Altos HillsAthertonEl GranadaWoodsideSan MateoDaly CityMountain ViewNewark
Cities and towns served by area code 650

Who issues 650 numbers

Mobile 21%VoIP and cable 29%Landline 50%

Share of the 717 prefixes (the three digits after 650) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
AT&T (Pacific Bell)273
AT&T Mobility59
T-Mobile57
Verizon Business (MCImetro)57
Lumen (Level 3)51
Onvoy (Sinch)48
Verizon Wireless36
AT&T (Teleport)26

Cities and towns in area code 650

CityPopulationOther area codes
San Mateo103,337
Daly City101,261
Mountain View85,438
Redwood City82,178
Palo Alto67,609
South San Francisco64,941
Newark47,895
San Bruno42,305
Pacifica36,890
Menlo Park32,713
Foster City32,411
Burlingame31,929
Los Altos30,965
San Carlos29,261
East Palo Alto28,872
Belmont28,752
Millbrae22,869
Stanford17,958
North Fair Oaks13,327
Half Moon Bay11,287
Hillsborough11,206
Los Altos Hills8,419
Atherton6,960
El Granada5,231
Woodside5,181

Got a call from 650?

A 650 number was originally issued in California, but that does not prove the caller is there. 29% of 650 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 717 prefixes in area code 650

Format: (650) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 650

Where is area code 650?
Area code 650 is in California. It covers San Mateo, Daly City, Mountain View, Redwood City, Palo Alto, South San Francisco and 19 more cities and towns.
What time zone is area code 650?
Area code 650 is in the Pacific time zone.
Is 650 a toll-free number?
No. 650 is a geographic area code in California. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Will area code 650 run out of numbers?
NANPA's latest forecast projects area code 650 to exhaust in the third quarter of 2039. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in California