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Area Code 857 Location & Details

State / Region: Massachusetts • Country: United States

Major Cities Covered: Boston, Cambridge, Quincy, Newton, Somerville, Everett, Chelsea, Watertown, Winthrop Town

Standard Dial Format
+1 (857) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 857?
MassachusettsState Hub →
Country Territory
United States
857 Area Code Time Zone
Eastern
857 Overlay Codes
617

Area Code 857 Geographic Map

Interactive location bounds and coverage area for Massachusetts (Eastern Timezone)

Lat: 42.36° • Lng: -71.08°
📍 Geographic Center: MassachusettsMap data © OpenStreetMap contributors

Where is Area Code 857 Located?

Telephone area code 857 is assigned to Massachusetts in United States. It serves cities and metropolitan communities including Boston, Cambridge, Quincy, Newton, Somerville, Everett, Chelsea, Watertown, Winthrop Town.

Historical Context & Area Code Overlay Information:857 serves Massachusetts (United States).

For local and long-distance calls within area code 857, standard 10-digit dialing (857) XXX-XXXX applies.

Who Called Me from Area Code 857?

Received an unknown call, missed call, or text scam from area code 857? Here is how to trace who is calling from 857 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 857 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 857:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 857 & Dialing Format

When placing a phone call to a number in area code 857, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (857) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 857 + 7-digit number.
  • Do I need to dial area code 857 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 857

Urban centers, census places, and communities within the +1-857 calling area

9 Major Cities Listed
City NameCountyPopulation% of 857 Pop
BostonSuffolk County672,97355.1%
CambridgeSuffolk County122,58810.0%
QuincySuffolk County103,1738.4%
NewtonNorfolk County90,7417.4%
SomervilleSuffolk County84,2116.9%
EverettSuffolk County53,5724.4%
ChelseaSuffolk County40,1303.3%
WatertownSuffolk County35,7102.9%
Winthrop TownSuffolk County18,6471.5%

Counties Covered by Area Code 857

Geographic county distribution and population coverage across Massachusetts

County NameTotal Population% of 857 Area% of County
Suffolk County793,53592.6%100%
Norfolk County737,6017.4%12%

☎️Area Code 857 Exchange Prefixes & Carriers

Showing 50 of 383 central office 3-digit prefixes and assigned telecom carriers

54% Landline29% Wireless17% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(857) 200-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA01/10/2011
(857) 201-📱WirelessWINTHROPMETROPCS, INC.10/28/2002
(857) 202-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA11/10/2011
(857) 203-📞LandlineJAMAICA PLVERIZON NEW ENGLAND INC.02/28/2005
(857) 204-📞LandlineBOSTONOMNIPOINT MIAMI E LICENSE, LLC03/20/2001
(857) 205-📱WirelessBOSTONNEW CINGULAR WIRELESS PCS, LLC - DC03/19/2001
(857) 206-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA10/07/2011
(857) 207-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA04/11/2007
(857) 208-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA02/08/2012
(857) 209-📞LandlineCAMBRIDGELEVEL 3 COMMUNICATIONS, LLC - MA10/11/2001
(857) 210-📞LandlineBOSTONOMNIPOINT MIAMI E LICENSE, LLC03/10/2011
(857) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(857) 212-📱WirelessDORCHESTERMETROPCS, INC.04/23/2001
(857) 213-📞LandlineBOSTONPAETEC ITEL, LLC10/03/2011
(857) 214-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA12/06/2011
(857) 215-📞LandlineBROOKLINEVERIZON NEW ENGLAND INC.02/23/2010
(857) 216-📞LandlineNEWTONYMAX COMMUNICATIONS CORP. - MA11/03/2009
(857) 217-📱WirelessDORCHESTERMETROPCS, INC.06/29/2001
(857) 218-📞LandlineBROOKLINEVERIZON NEW ENGLAND INC.01/12/2007
(857) 219-💻VoIPNEWTONONVOY, LLC - MA02/16/2012
(857) 220-📞LandlineDORCHESTERPAETEC ITEL, LLC03/20/2001
(857) 221-📱WirelessBOSTONMETROPCS, INC.05/25/2005
(857) 222-📞LandlineBOSTONOMNIPOINT MIAMI E LICENSE, LLC05/17/2001
(857) 223-📞LandlineBOSTONPAETEC ITEL, LLCN/A
(857) 224-📞LandlineBOSTONVERIZON NEW ENGLAND INC.12/17/2009
(857) 225-📱WirelessBROOKLINECELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA05/03/2001
(857) 226-📞LandlineNEWTONU.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS03/30/2006
(857) 227-📞LandlineSOMERVILLEMCIMETRO ACCESS TRANSMISSION SERVICES LLC05/23/2001
(857) 228-📞LandlineWATERTOWNPAETEC ITEL, LLC07/12/2001
(857) 229-📞LandlineNEWTONPAETEC ITEL, LLCN/A
(857) 230-📞LandlineROXBURYOMNIPOINT MIAMI E LICENSE, LLC04/15/2009
(857) 231-📱WirelessNEWTONMETROPCS, INC.07/30/2002
(857) 232-💻VoIPNEWTONONVOY, LLC - MA05/17/2006
(857) 233-📞LandlineBOSTONOMNIPOINT MIAMI E LICENSE, LLC02/16/2006
(857) 234-📞LandlineBROOKLINEOMNIPOINT MIAMI E LICENSE, LLC03/18/2002
(857) 235-📞LandlineCAMBRIDGEVERIZON NEW ENGLAND INC.11/18/2008
(857) 236-📱WirelessBOSTONMETROPCS, INC.08/04/2008
(857) 237-📱WirelessBOSTONMETROPCS, INC.06/08/2009
(857) 238-📞LandlineBOSTONVERIZON NEW ENGLAND INC.11/14/2007
(857) 239-💻VoIPBOSTONONVOY, LLC - MAN/A
(857) 240-💻VoIPNEWTONPEERLESS NETWORK OF MASSACHUSETTS, LLC - MA02/28/2012
(857) 241-📞LandlineBOSTONLEVEL 3 COMMUNICATIONS, LLC - MA10/24/2006
(857) 242-📞LandlineCAMBRIDGEU.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS09/08/2011
(857) 243-💻VoIPBOSTONONVOY, LLC - MA11/05/2009
(857) 244-💻VoIPBOSTONBANDWIDTH.COM CLEC, LLC - MA06/10/2008
(857) 245-📞LandlineBROOKLINEYMAX COMMUNICATIONS CORP. - MA11/02/2006
(857) 246-📱WirelessBOSTONMETROPCS, INC.N/A
(857) 247-📱WirelessBOSTONMETROPCS, INC.06/08/2009
(857) 248-📱WirelessBOSTONCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA03/08/2012
(857) 249-📱WirelessBOSTONMETROPCS, INC.08/04/2008

Frequently Asked Questions about Area Code 857

Where is area code 857 located?

Area code 857 is located in Massachusetts (United States), serving cities like Boston, Cambridge, Quincy, Newton, Somerville, Everett, Chelsea, Watertown, Winthrop Town.

What timezone is area code 857?

Area code 857 operates in the Eastern timezone.

What state is area code 857?

Area code 857 is assigned to the state / telecom territory of Massachusetts.

Is area code 857 a scam or dangerous?

Area code 857 is an official geographic area code for Massachusetts. However, beware of robocaller spoofing.

Massachusetts State Area Codes

View complete directory of telephone area codes assigned to Massachusetts.

Explore Massachusetts Directory

Get a 857 Business Phone Number

How to acquire a virtual phone number or business line with area code 857 for local customer trust in Massachusetts.

Get 857 Business Number
🛡️ Scam & Safety Directory

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Overlay & Nearby Area Codes for Massachusetts

Explore neighboring telecom prefixes sharing geographical boundaries with area code 857.

617
Eastern
Area Code 617
Boston, Cambridge, Quincy, Newton, Somerville, Everett, Chelsea, Watertown, Winthrop Town
339
Eastern
Area Code 339
Lynn, Malden, Waltham, Revere, Medford, Weymouth Town, Woburn, Braintree Town, Randolph Town, Melrose
351
Eastern
Area Code 351
Lowell, Lawrence, Haverhill, Peabody, Methuen, Salem, Leominster, Beverly, Fitchburg, Gloucester
413
Eastern
Area Code 413
Springfield, Chicopee, Pittsfield, Amherst Town, Westfield, Holyoke, Northampton, West Springfield Town, Agawam Town, Greenfield
508
Eastern
Area Code 508
Worcester, Brockton, New Bedford, Fall River, Framingham, Taunton, Barnstable Town, Attleboro, Marlborough, Franklin Town
774
Eastern
Area Code 774
Worcester, Brockton, New Bedford, Fall River, Framingham, Taunton, Barnstable Town, Attleboro, Marlborough, Franklin Town