Area Code 857: Boston Overlay

Area code 857 is in Boston Overlay, Massachusetts. Numbers that start with 857 are based in Boston, Malden, Medford.

Area code 857 covers Boston Overlay in Massachusetts. The primary cities served include Boston, Malden, Medford.

Area code 857 is primarily associated with Boston, along with Malden, Medford. It serves the broader Boston Overlay area.

Area code 857 is in Massachusetts (MA). Massachusetts has 9 area codes in total.

Area code 857 operates in the Eastern Time Zone. Keep this in mind when scheduling calls with contacts in the Boston Overlay area.

Yes, area code 857 is an overlay of area code 617. Both codes serve the same geographic area, Boston Overlay, and were introduced to meet growing demand for phone numbers. Because 857 is an overlay, 10-digit dialing is required for all local calls within the region.

Yes. Because 857 is an overlay sharing its territory with area code 617, 10-digit dialing, the full area code plus the 7-digit number, is required for all local calls within Boston Overlay.

No, area code 857 is a local geographic area code, not a toll-free number. Standard call charges apply based on your carrier plan. Toll-free area codes include 800, 833, 844, 855, 866, 877, and 888.

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