To the Getareacode homepage

857 Area CodeBoston, MA

Area code 857 covers Boston and nearby communities in Massachusetts, in the Eastern Time (ET) zone, home to about 1,325,195 people across 12 cities. It was added in 2001 as an overlay of 617, so the same region uses both codes and every local call needs all ten digits.

Overview

Major City
Boston
State
Massachusetts (MA)
Timezone
Eastern Time (ET)
Current Time
–:––
Overlay
Yes – shares area with 617

Nearby Area Codes

Where is area code 857?

Area code 857 serves part of Boston, MA and the surrounding areas. It has a single overlay (617) that serves the same area.

Overview of the 857 Area Code

What is the 857 area code?

The 857 area code serves Boston, Massachusetts, alongside other established area codes. When you see a 857 number, it indicates a local number within this geographic area.

Why was area code 857 created?

Area code 857 went into service on May 2, 2001, as an overlay of 617. An overlay adds a second code to the same territory instead of splitting it: existing 617 numbers kept their digits, new lines began receiving 857 numbers, and local calls in the region require all ten digits.

Geographic Coverage of the 857 Area Code

The 857 area code serves Boston and surrounding areas in Massachusetts. It operates within the Eastern Time (ET) time zone. It complements the coverage of area code 617. This area code covers several key cities, including:

  • Boston
  • Cambridge
  • Quincy
  • Newton
  • Somerville
  • Brookline

Got a call from an 857 number? It came from Boston, MA. Since 857 overlays with 617, every local call in the region needs all ten digits to land on the right line. Of the listed cities' population, Boston accounts for about 50.9%; the rest is split across 11 smaller cities.

Boston Area Codes Overview

Boston is served by multiple area codes, reflecting its telecommunications needs. The 857 area code operates alongside 617. Here are the area codes serving this region:

617857

The introduction of the 857 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.

What cities does area code 857 cover?

CityStatePopulationPopulation in 857% of listed-city population% of City
BostonMA673,458673,45850.9%100.0%
CambridgeMA121,186121,1869.2%100.0%
QuincyMA103,434103,4347.8%100.0%
NewtonMA90,70090,7006.9%100.0%
SomervilleMA82,14982,1496.2%100.0%
BrooklineMA58,73258,7324.4%100.0%
EverettMA51,82551,8253.9%100.0%
ChelseaMA40,24540,2453.0%100.0%
Watertown TownMA31,91531,9152.4%100.0%
MiltonMA27,00327,0032.0%100.0%
BelmontMA24,72924,7291.9%100.0%
Winthrop TownMA18,73914,7721.4%78.8%

City population is shown in full. The share of each city inside 857 is measured from Census tract centroids, not estimated from a rate-center match – so a city split between two codes appears on both, at the fraction each one actually holds. The “% of listed-city population” column uses the full populations of the cities listed here.

What counties does area code 857 cover?

1,325,195 residents across 3 counties, counted inside the 857 boundary — a county split between codes contributes only its part.

CountyStatePopulation in 857% of area-code footprint% of County
Suffolk CountyMA731,66855%92%
Middlesex CountyMA400,07030%25%
Norfolk CountyMA193,45715%27%

Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.

Has area code 857 been reported for unwanted calls?

Yes – 1,356 unwanted-call complaints were reported to the FTC for numbers showing a 857 area code (May 29 – Aug 14, 2026).

  • 76% robocalls
  • ↑ 40% vs prior period

Most-reported subjects

  • Other40%548
  • Reducing your debt (credit cards, mortgage, student loans)28%376
  • Calls pretending to be government, businesses, or family and friends19%251

Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-08-17.

Which prefixes and exchanges belong to area code 857?

34% assigned to a telco

  • 71% Landline
  • 29% Wireless
  • 0% Unknown
PrefixUsageCarrier
(857)200-WirelessVerizon Wireless
(857)201-WirelessSprint Spectrum
(857)202-WirelessVerizon Wireless
(857)203-LandlineVerizon New England
(857)204-LandlineOmnipoint Miami E License
(857)205-WirelessNew Cingular Wireless Pcs
(857)206-WirelessVerizon Wireless
(857)207-WirelessVerizon Wireless
(857)208-WirelessVerizon Wireless
(857)209-LandlineLevel 3 Communications
(857)210-WirelessSprint Spectrum
(857)212-WirelessSprint Spectrum
(857)213-LandlinePaetec Communications
(857)214-WirelessVerizon Wireless
(857)215-LandlineVerizon New England
(857)216-LandlineYmax Communications
(857)217-WirelessSprint Spectrum
(857)218-LandlineVerizon New England
(857)219-LandlineOnvoy
(857)220-LandlineBroadview Networks
(857)221-WirelessSprint Spectrum
(857)222-LandlineOmnipoint Miami E License
(857)223-LandlineCtc Communications
(857)224-LandlineVerizon New England
(857)225-WirelessVerizon Wireless
(857)226-LandlineTpx Communications
(857)227-LandlineMcimetro Access Transmission Services
(857)228-LandlineCtc Communications
(857)229-LandlineCtc Communications
(857)230-LandlineOmnipoint Miami E License
(857)231-WirelessSprint Spectrum
(857)232-LandlineOnvoy
(857)233-WirelessSprint Spectrum
(857)234-LandlineOmnipoint Miami E License
(857)235-LandlineVerizon New England
(857)236-LandlineMetropcs
(857)237-LandlineMetropcs
(857)238-LandlineVerizon New England
(857)239-LandlineOnvoy
(857)240-LandlinePeerless Network Of Massachusetts
(857)241-LandlineLevel 3 Communications
(857)242-LandlineTpx Communications
(857)243-LandlineOnvoy
(857)244-LandlineBandwidth.Com Clec
(857)245-LandlineYmax Communications
(857)246-LandlineMetropcs
(857)247-LandlineMetropcs
(857)248-WirelessVerizon Wireless
(857)249-LandlineMetropcs
(857)250-LandlineOmnipoint Miami E License
(857)251-LandlineMetropcs
(857)252-LandlineBroadview Networks
(857)253-LandlineBroadview Networks
(857)254-LandlineBroadview Networks
(857)255-LandlineBroadview Networks
(857)256-LandlinePeerless Network Of Massachusetts
(857)257-WirelessSprint Spectrum
(857)258-LandlineMetropcs
(857)259-WirelessNew Cingular Wireless Pcs
(857)260-WirelessVerizon Wireless
(857)261-LandlineMetropcs
(857)262-WirelessVerizon Wireless
(857)263-WirelessVerizon Wireless
(857)264-LandlineOmnipoint Miami E License
(857)265-WirelessNew Cingular Wireless Pcs
(857)266-LandlineMetropcs
(857)267-LandlineComcast Ip Phone
(857)268-WirelessVerizon Wireless
(857)269-LandlinePeerless Network Of Massachusetts
(857)270-WirelessVerizon Wireless
(857)271-WirelessSprint Spectrum
(857)272-WirelessNew Cingular Wireless Pcs
(857)273-LandlineComcast Ip Phone
(857)274-WirelessVerizon Wireless
(857)275-WirelessVerizon Wireless
(857)276-WirelessVerizon Wireless
(857)277-LandlineOmnipoint Miami E License
(857)278-WirelessVerizon Wireless
(857)279-WirelessVerizon Wireless
(857)280-LandlineOnvoy
(857)281-WirelessVerizon Wireless
(857)282-LandlineVerizon New England
(857)283-WirelessVerizon Wireless
(857)284-LandlineOmnipoint Miami E License
(857)285-LandlinePaetec Communications
(857)286-WirelessVerizon Wireless
(857)287-LandlineMetropcs
(857)288-LandlineXo Massachusets
(857)289-LandlineOnvoy
(857)290-WirelessVerizon Wireless
(857)291-WirelessVerizon Wireless
(857)292-WirelessVerizon Wireless
(857)293-LandlineBroadview Networks
(857)294-WirelessVerizon Wireless
(857)295-WirelessVerizon Wireless
(857)296-LandlineLevel 3 Communications
(857)297-LandlineComcast Ip Phone
(857)298-LandlineOnvoy Spectrum
(857)299-WirelessSprint Spectrum
(857)300-WirelessVerizon Wireless
(857)301-WirelessVerizon Wireless
(857)302-LandlineAirus
(857)303-WirelessVerizon Wireless
(857)304-LandlineTc Systems
(857)305-LandlineLevel 3 Communications
(857)306-LandlineCenturylink Communications
(857)307-LandlineVerizon New England
(857)308-LandlineOmnipoint Miami E License
(857)309-LandlineOnvoy
(857)310-LandlineOmnipoint Miami E License
(857)312-LandlineMetropcs
(857)313-LandlineOmnipoint Miami E License
(857)314-LandlineBandwidth.Com Clec
(857)315-LandlineCenturylink Communications
(857)316-LandlineOmnipoint Miami E License
(857)317-LandlineCenturylink Communications
(857)318-LandlineXo Massachusets
(857)319-WirelessVerizon Wireless
(857)320-LandlineOmnipoint Miami E License
(857)321-WirelessVerizon Wireless
(857)322-LandlineComcast Ip Phone
(857)323-LandlineVerizon New England
(857)324-WirelessVerizon Wireless
(857)325-WirelessVerizon Wireless
(857)326-WirelessVerizon Wireless
(857)327-WirelessVerizon Wireless
(857)328-LandlineVoip Innovations
(857)329-WirelessVerizon Wireless
(857)330-WirelessVerizon Wireless
(857)331-WirelessVerizon Wireless
(857)332-WirelessVerizon Wireless
(857)333-LandlineOmnipoint Miami E License
(857)334-LandlineOmnipoint Miami E License
(857)335-WirelessCsc Wireless
(857)336-LandlineOnvoy
(857)337-WirelessVerizon Wireless
(857)338-LandlineTc Systems
(857)340-LandlineOmnipoint Miami E License
(857)341-LandlineBandwidth.Com Clec
(857)342-WirelessVerizon Wireless
(857)343-WirelessVerizon Wireless
(857)344-WirelessVerizon Wireless
(857)345-WirelessVerizon Wireless
(857)346-LandlineTelengy
(857)347-LandlineAdvanced Telecom Solutions
(857)348-LandlineWavenation
(857)349-LandlineBandwidth.Com Clec
(857)350-WirelessVerizon Wireless
(857)352-LandlineOmnipoint Miami E License
(857)353-LandlineMcimetro Access Transmission Services
(857)354-LandlineOmnipoint Miami E License
(857)355-LandlineAirus
(857)356-LandlineOmnipoint Miami E License
(857)357-LandlineMegaphone
(857)358-WirelessNew Cingular Wireless Pcs
(857)359-WirelessVerizon Wireless
(857)360-WirelessVerizon Wireless
(857)361-LandlineOmnipoint Miami E License
(857)362-LandlineVerizon New England
(857)363-WirelessVerizon Wireless
(857)364-LandlineBroadview Networks
(857)365-LandlineNuso
(857)366-WirelessVerizon Wireless
(857)367-LandlineTc Systems
(857)368-LandlinePaetec Communications
(857)369-LandlineLevel 3 Communications
(857)370-LandlineOmnipoint Miami E License
(857)371-LandlineOnvoy
(857)372-WirelessVerizon Wireless
(857)373-LandlineBroadview Networks
(857)374-LandlineOnvoy
(857)375-LandlineOnvoy
(857)376-LandlineOmnipoint Miami E License
(857)377-LandlinePaetec Communications
(857)378-LandlineVerizon New England
(857)379-LandlineBandwidth.Com Clec
(857)380-LandlineOnvoy
(857)381-LandlineOmnipoint Miami E License
(857)382-LandlineOnvoy
(857)383-LandlineTc Systems
(857)384-LandlineOnvoy
(857)385-WirelessNew Cingular Wireless Pcs
(857)386-LandlineVerizon New England
(857)387-LandlineComcast Ip Phone
(857)388-LandlineCommio
(857)389-LandlineOmnipoint Miami E License
(857)390-LandlineOmnipoint Miami E License
(857)391-LandlineOmnipoint Miami E License
(857)392-LandlineOnvoy
(857)393-WirelessVerizon Wireless
(857)394-LandlineMcimetro Access Transmission Services
(857)395-LandlineOmnipoint Miami E License
(857)396-LandlineOmnipoint Miami E License
(857)397-LandlineOmnipoint Miami E License
(857)398-LandlineOmnipoint Miami E License
(857)399-LandlineBandwidth.Com Clec
(857)400-LandlineBandwidth.Com Clec
(857)401-LandlineBroadview Networks
(857)402-LandlineHd Carrier
(857)403-LandlinePaetec Communications
(857)404-LandlineComcast Ip Phone
(857)405-LandlineOmnipoint Miami E License
(857)406-WirelessVerizon Wireless
(857)407-WirelessNew Cingular Wireless Pcs
(857)408-WirelessVerizon Wireless
(857)409-WirelessVerizon Wireless
(857)410-LandlineBandwidth.Com Clec
(857)412-LandlineOnvoy
(857)413-LandlineLevel 3 Communications
(857)414-LandlineHd Carrier
(857)415-LandlineVonage America
(857)416-LandlineTpx Communications
(857)417-LandlineMetropcs
(857)418-LandlineTpx Communications
(857)419-WirelessNew Cingular Wireless Pcs
(857)420-LandlineOnvoy
(857)422-LandlineOnvoy
(857)423-LandlineOmnipoint Miami E License
(857)424-WirelessNew Cingular Wireless Pcs
(857)425-WirelessNew Cingular Wireless Pcs
(857)437-LandlineOmnipoint Miami E License
(857)443-LandlineCommio
(857)444-LandlinePeerless Network Of Massachusetts
(857)445-WirelessNew Cingular Wireless Pcs
(857)449-LandlineComcast Ip Phone
(857)452-WirelessSprint Spectrum
(857)453-LandlineLevel 3 Communications
(857)465-LandlineFractel
(857)466-LandlineTon80 Communications
(857)467-LandlineTon80 Communications
(857)468-LandlineTon80 Communications
(857)472-WirelessNew Cingular Wireless Pcs
(857)475-LandlineRadiantiq
(857)477-LandlineOnvoy
(857)488-WirelessVerizon Wireless
(857)491-LandlineLightpath Of New England
(857)492-WirelessSprint Spectrum
(857)496-LandlineComcast Ip Phone
(857)498-WirelessNew Cingular Wireless Pcs
(857)499-WirelessNew Cingular Wireless Pcs
(857)500-WirelessVerizon Wireless
(857)504-LandlineMosaic Networx
(857)505-LandlineMetropcs
(857)507-WirelessVerizon Wireless
(857)520-LandlineOnvoy
(857)523-WirelessVerizon Wireless
(857)524-LandlineXo Massachusets
(857)526-WirelessSprint Spectrum
(857)529-WirelessVerizon Wireless
(857)540-WirelessSprint Spectrum
(857)544-LandlineOmnipoint Miami E License
(857)547-LandlineBroadview Networks
(857)557-LandlineHd Carrier
(857)559-LandlineXo Massachusets
(857)567-LandlineOnvoy
(857)574-LandlineCtc Communications
(857)575-LandlineRadiantiq
(857)576-LandlineBandwidth.Com Clec
(857)577-LandlineOnvoy
(857)578-LandlineTwilio International
(857)587-LandlineHd Carrier
(857)588-LandlineXo Massachusets
(857)597-LandlineRadiantiq
(857)598-LandlineXo Massachusets
(857)600-LandlineBandwidth.Com Clec
(857)615-LandlineMetropcs
(857)626-LandlineMcimetro Access Transmission Services
(857)636-WirelessVerizon Wireless
(857)639-LandlineTon80 Communications
(857)654-LandlineOmnipoint Miami E License
(857)663-LandlineTpx Communications
(857)666-LandlineOnvoy
(857)675-LandlineRadiantiq
(857)678-LandlineRadiantiq
(857)688-LandlineFractel
(857)693-LandlineTon80 Communications
(857)701-LandlineOmnipoint Miami E License
(857)702-LandlineNuso
(857)703-WirelessVerizon Wireless
(857)706-LandlineGetgo Communications
(857)707-WirelessVerizon Wireless
(857)719-WirelessSprint Spectrum
(857)728-LandlineXo Massachusets
(857)737-LandlineTon80 Communications
(857)746-LandlineTon80 Communications
(857)753-WirelessVerizon Wireless
(857)754-LandlineOnvoy
(857)755-LandlineFractel
(857)756-LandlineMettel
(857)757-LandlineWide Voice
(857)758-LandlineFractel
(857)760-LandlineBandwidth.Com Clec
(857)762-LandlineMetropcs
(857)763-LandlineOmnipoint Miami E License
(857)766-LandlineFractel
(857)767-LandlineTon80 Communications
(857)770-LandlineIntrado Communications
(857)772-WirelessVerizon Wireless
(857)773-WirelessSprint Spectrum
(857)776-LandlineLevel 3 Communications
(857)777-LandlinePeerless Network Of Massachusetts
(857)788-LandlineSkyetel
(857)799-LandlineHd Carrier
(857)800-LandlineOnvoy
(857)810-LandlineRadiantiq
(857)814-LandlineMultiple Ocn Listing
(857)816-LandlineXo Massachusets
(857)829-WirelessSprint Spectrum
(857)832-LandlineTon80 Communications
(857)837-LandlineOnvoy
(857)847-LandlineOnvoy Spectrum
(857)855-LandlineOnvoy
(857)856-LandlineOnvoy
(857)858-LandlineOnvoy
(857)867-LandlineOnvoy Spectrum
(857)869-LandlineOmnipoint Miami E License
(857)877-LandlineOnvoy
(857)880-LandlineBarr Tell Usa
(857)887-LandlineOnvoy Spectrum
(857)888-WirelessSprint Spectrum
(857)891-LandlineOmnipoint Miami E License
(857)895-LandlineRclec
(857)919-LandlineOmnipoint Miami E License
(857)928-LandlineOmnipoint Miami E License
(857)930-LandlineRclec
(857)939-WirelessVerizon Wireless
(857)957-LandlineWide Voice
(857)961-LandlineOmnipoint Miami E License
(857)971-LandlineOnvoy
(857)972-LandlineLevel 3 Communications
(857)990-LandlineWorldcall Interconnect
(857)991-LandlineComcast Ip Phone
(857)995-LandlineOnvoy
(857)996-LandlineMcimetro Access Transmission Services
(857)997-LandlineHd Carrier
(857)998-WirelessVerizon Wireless
(857)999-LandlinePeerless Network Of Massachusetts

Frequently Asked Questions about the 857 Area Code

Who called me from a 857 number?

A 857 number is assigned to Boston, Massachusetts, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 857 code to look nearby, so a 857 number doesn't prove the caller is local. Recently, 1,356 unwanted-call complaints were reported to the FTC for numbers showing the 857 code (76% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.

Is 857 a scam area code?

No area code is a scam on its own. 857 is a normal, officially assigned code for Boston, Massachusetts. Spam callers spoof local codes to raise the odds you answer, so 857 on your caller ID says nothing about who is really calling. Recently, 1,356 unwanted-call complaints were reported to the FTC for numbers showing the 857 code (76% flagged as robocalls). Judge the call itself, not the area code.

Why do I keep getting calls from the 857 area code?

Repeated calls from different 857 numbers are usually spoofing: a robocaller rotates through 857 numbers so each call looks local and slips past simple blocks. Recently, 1,356 unwanted-call complaints were reported to the FTC for numbers showing the 857 code (76% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.

Should I answer an unknown 857 number?

If you aren't expecting a 857 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.

How do I block calls from the 857 area code?

Block a single 857 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 857 code also stops legitimate local calls, so use it only as a last resort.

Where is area code 857?

Area code 857 covers Boston and the surrounding area in Massachusetts, spanning 12 cities with about 1,325,195 residents. It shares its area with overlay code 617.

When did area code 857 go into service?

Area code 857 went into service on May 2, 2001. It was added as an overlay of 617, so 857 numbers serve the same area that 617 already covered.

Is 857 a real area code?

Yes. 857 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Boston, Massachusetts. A real code can still show up on spoofed spam calls, so treat unknown 857 calls with normal caution.

What timezone is the 857 area code in?

The 857 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 857 caller may not be in that zone.

How do I call a 857 number from abroad?

From outside the US, dial your country's exit code, then 1 (the US country code), then 857 and the seven-digit number. From a mobile phone you can usually just enter +1 857 followed by the number and let the phone add the exit code for you.

Related Area Codes