Area Code 857 — Massachusetts

Active General Purpose Code Overlay United States

Area code 857 is located in Massachusetts and operates on Eastern Time . The largest city served is Boston .

Coverage Area

Area code 857 — Massachusetts

Area Code Details

Area Code: 857
State / Province: Massachusetts (MA)
Country: United States
Time Zone: Eastern Time Eastern Time
Local Time Now: —
Status: Active
Code Type: General Purpose Code
In Service Since: May 2, 2001
Assigned: May 3, 2000
Population Served: ~1,162,413 est.
Overlay Complex: 617/857

Cities Served

Largest City Boston

Boston Cambridge Dorchester Newton Brookline Brighton East Boston Watertown Hyde Park

History & Relationships

Split from

Overlay complex — shares geography with

617 Massachusetts

Rate Centers & Exchanges

9 rate centers identified within area code 857

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Other Area Codes in Massachusetts

Nearby Area Codes

Frequently Asked Questions About Area Code 857

What state is area code 857?

Area code 857 is located in Massachusetts, United States.

Where is area code 857 from?

Area code 857 originates from Massachusetts. It operates in the Eastern Time zone.

What time zone is area code 857?

Area code 857 falls within the Eastern Time zone (Eastern Time).

What cities are in area code 857?

Area code 857 serves cities including Boston, Cambridge, Dorchester, Newton, Brookline, Brighton, East Boston, Watertown, and more.

Is a call from area code 857 a scam?

Area code 857 is a legitimate general purpose code area code serving Massachusetts. Like any area code, individual numbers using 857 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.