What time zone is area code 857 in?

Area code 857 uses Eastern Time.

What area codes overlay 857?

617 serves the same area as 857. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.

Is a call from area code 857 a scam?

The area code alone doesn’t tell you. Most calls from 857 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 857 number, let it go to voicemail.

When did area code 857 start?

857 went into service in 2001. It was created from area code 617.

Can a 857 number be outside Massachusetts?

Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 857 caller can be anywhere.

Area code 857

Where is area code 857?

Boston, Cambridge and Brookline, Massachusetts

Local time: … (Eastern Time)

State	Massachusetts
Country	United States
Main cities	Boston, Cambridge and Brookline
Time zone	Eastern Time
Overlay area codes	617
In service since	2001 (created from 617)
Assigned prefixes	361
Dialing format	(857) XXX-XXXX · +1 857 XXX XXXX from abroad

Look up a 857 number

Cities and towns in area code 857

Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 857.

Boston, MA (152)
Cambridge, MA (28)
Brookline, MA (26)
Roxbury, MA (20)
Newton, MA (18)
Quincy, MA (14)
Brighton, MA (13)
Dorchester, MA (13)
Charlestown, MA (10)
Jamaica Plain, MA (9)
Somerville, MA (8)
Belmont, MA (7)
East Boston, MA (7)
So Boston, MA (6)
Watertown, MA (6)
Winthrop, MA (6)
Hyde Park, MA (5)
Chelsea, MA (4)
Everett, MA (4)
Milton, MA (4)
Xxxxxxxxxx, MA (1)

Phone companies in area code 857

The carriers that hold the most 857 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.

Prefixes	Carrier
67	Verizon Wireless
60	Omnipoint Miami E License (T-Mobile)
42	Onvoy
25	Metropcs (T-Mobile)
19	Paetec Itel
18	New Cingular Wireless PCS (AT&T)
13	Verizon New England
13	Mcimetro Access Transmission Services

All 361 prefixes in area code 857

Pick the 3 digits after the area code to see that prefix’s city and carrier.

Area codes that overlay 857

Questions

Where is area code 857?: Area code 857 is in Massachusetts. It serves Boston, Cambridge, Brookline, Roxbury and Newton and 16 other cities and towns.
What time zone is area code 857 in?: Area code 857 uses Eastern Time.
What area codes overlay 857?: 617 serves the same area as 857. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.
Is a call from area code 857 a scam?: The area code alone doesn’t tell you. Most calls from 857 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 857 number, let it go to voicemail.
When did area code 857 start?: 857 went into service in 2001. It was created from area code 617.
Can a 857 number be outside Massachusetts?: Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 857 caller can be anywhere.

Other area codes in Massachusetts

Area code	Main cities
339	Lynn, Bryantvl and Weymouth
351	Acton, Gloucester and Lowell
413	Springfield, Holyoke and Amherst
508	Worcester, Framingham and Brockton
774	Worcester, Framingham and Brockton
781	Waltham, Lexington and Burlington
978	Lawrence, Lowell and Billerica