Area Code 857
Area code 857 covers Boston and nearby cities including Cambridge, Quincy, Newton in Massachusetts, in the Eastern Time.
Area code 857 quick facts
| Location | Boston, Massachusetts |
|---|---|
| Time zone | Eastern Time |
| In service | 2001-05-02 |
| Overlay codes | 617 |
| Nearby codes | 617, 339, 781, 351, 978, 508 |
| Carrier coverage | 365 prefixes; 50% wireless |
| FTC complaint data | 194 complaints across 51 numbers |
| Data current as of | August 2, 2026 |
Is a call from 857 a scam? Who called me from 857?
FTC complaints involving 857 numbers
Numbers shown with area code 857 in the FTC's Do Not Call “Reported Calls” database (recent reporting window). Most common reported reasons: “Other”, “Reducing your debt (credit cards, mortgage, student loans)”, “Calls pretending to be government, businesses, or family and friends”.
Most-complained 857 numbers:
- (857) 416-5072 — 7 complaints
- (857) 236-6660 — 7 complaints
- (857) 766-0983 — 7 complaints
- (857) 203-0297 — 7 complaints
- (857) 810-6209 — 6 complaints
These are FTC Do Not Call complaints filed about specific numbers shown with this area code — frequently spoofed. The area code itself is not a scam. See the most-reported area codes and the most-reported phone numbers nationwide.
Cities in area code 857
Boston, Cambridge, Quincy, Newton, Somerville, Everett, Chelsea, Belmont, Brookline, Milton, South Boston, Watertown
Area codes by city
Carriers in area code 857
Area code 857 spans 365 prefixes, about 50% wireless. Top carriers: OMNIPOINT MIAMI E LICENSE, LLC, ONVOY, LLC - MA, CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA, METROPCS, INC.. Look up the carrier and line type for a 857 number.
Other Massachusetts area codes
- 339 — Lynn
- 351 — Acton
- 413 — Springfield
- 508 — Framingham
- 617 — Boston
- 774 — Worcester
- 781 — Waltham
- 978 — Lowell
Nearby area codes
Frequently asked questions
Where is area code 857?
Area code 857 covers Boston and nearby cities including Cambridge, Quincy, Newton in Massachusetts, in the Eastern Time.
What cities use area code 857?
Area code 857 serves Boston, Cambridge, Quincy, Newton, Somerville, and 7 other communities in Massachusetts.
What time zone is area code 857 in?
Area code 857 is in the Eastern Time (America/New_York).
How do you dial a 857 number?
Dial all 10 digits: 857 followed by the 7-digit local number. From abroad, dial +1 857 and the local number.
Is a call from area code 857 a scam?
A 857 number is geographically tied to Massachusetts, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.
Is 857 a country code?
No. 857 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 857 number written for international dialing looks like +1 857 followed by the 7-digit local number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.