The 857 area code is Boston

Where is the 857 area code?

The 857 area code is a United States telephone area code covering Boston, MA. Numbers that start with 857 are physically tied to this region, and calls to or from 857 run on Eastern Time — worth remembering before you dial, so you don't catch someone at the wrong hour. Because 857 is an overlay, it sits on top of other codes serving the same area — which is why local calls there require all 10 digits.

Is a call from 857 spam?

Not by itself. 857 is a legitimate geographic area code for Boston — plenty of real people and businesses have 857 numbers. But scammers often spoof local area codes so an unknown call looks familiar and you're more likely to pick up. If a 857 number you don't recognize calls, let it go to voicemail and check who left a message before calling back.

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