The 650 area code is San Mateo & the Peninsula

Where is the 650 area code?

The 650 area code is a United States telephone area code covering San Mateo & the Peninsula, CA. Numbers that start with 650 are physically tied to this region, and calls to or from 650 run on Pacific Time — worth remembering before you dial, so you don't catch someone at the wrong hour.

Is a call from 650 spam?

Not by itself. 650 is a legitimate geographic area code for San Mateo & the Peninsula — plenty of real people and businesses have 650 numbers. But scammers often spoof local area codes so an unknown call looks familiar and you're more likely to pick up. If a 650 number you don't recognize calls, let it go to voicemail and check who left a message before calling back.

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