857 Area Code: Location, Cities, Map And Time Zone

Share Area Code 857

Area code 857 is in Massachusetts, USA , spanning 3 counties and serving 36 cities , including Boston, Newton or Somerville; it currently uses 358 prefixes , assigned from 857-200-XXXX through 857-999-XXXX.

In service since May 02, 2001, area code 857 is an overlay Numbering Plan Area, part of overlay complex 617/857.

The current local time is .

857 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 857 area code map

Phone number lookup

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More Massachusetts area codes:

  • 339
  • 351
  • 413
  • 508
  • 617
  • 774
  • 781
  • 978

Locate any 857-NXX prefix:

857-200-XXXX --- 857-299-XXXX
NPANXX Carrier1 Area Served2 Date3
857-200 Cellco Partnership Boston 1/10/2011
857-201 MetroPCS Winthrop 10/28/2002
857-202 Cellco Partnership Boston 11/10/2011
857-203 Verizon New England Jamaica Plain 2/28/2005
857-204 Omnipoint Miami E License Boston 3/20/2001
857-205 New Cingular Wireless PCS Boston 3/19/2001
857-206 Cellco Partnership Boston 10/7/2011
857-207 Cellco Partnership Boston 4/11/2007
857-208 Cellco Partnership Boston 2/8/2012
857-209 Level 3 Communications Cambridge 10/11/2001
857-210 Omnipoint Miami E License Boston 3/10/2011
857-212 MetroPCS Dorchester 4/23/2001
857-213 Paetec Itel Boston 10/3/2011
857-214 Cellco Partnership Boston 12/6/2011
857-215 Verizon New England Brookline 2/23/2010
857-216 Ymax Communications Corp. Newton 11/3/2009
857-217 MetroPCS Dorchester 6/29/2001
857-218 Verizon New England Brookline 1/12/2007
857-219 Onvoy Newton 2/16/2012
857-220 Paetec Itel Dorchester 3/20/2001
857-221 MetroPCS Boston 5/25/2005
857-222 Omnipoint Miami E License Boston 5/17/2001
857-223 Paetec Itel Boston N/A
857-224 Verizon New England Boston 12/17/2009
857-225 Cellco Partnership Brookline 5/3/2001
857-226 U.S. Telepacific Corp. Newton 3/30/2006
857-227 MCIMetro Access Transmission Services Somerville 5/23/2001
857-228 Paetec Itel Watertown 7/12/2001
857-229 Paetec Itel Newton N/A
857-230 Omnipoint Miami E License Roxbury 4/15/2009
857-231 MetroPCS Newton 7/30/2002
857-232 Onvoy Newton 5/17/2006
857-233 Omnipoint Miami E License Boston 2/16/2006
857-234 Omnipoint Miami E License Brookline 3/18/2002
857-235 Verizon New England Cambridge 11/18/2008
857-236 MetroPCS Boston 8/4/2008
857-237 MetroPCS Boston 6/8/2009
857-238 Verizon New England Boston 11/14/2007
857-239 Onvoy Boston N/A
857-240 Peerless Network Of Massachusetts Newton 2/28/2012
857-241 Level 3 Communications Boston 10/24/2006
857-242 U.S. Telepacific Corp. Cambridge 9/8/2011
857-243 Onvoy Boston 11/5/2009
857-244 Bandwidth.com Clec Boston 6/10/2008
857-245 Ymax Communications Corp. Brookline 11/2/2006
857-246 MetroPCS Boston N/A
857-247 MetroPCS Boston 6/8/2009
857-248 Cellco Partnership Boston 3/8/2012
857-249 MetroPCS Boston 8/4/2008
857-250 Omnipoint Miami E License Boston 7/15/2011
857-251 MetroPCS Boston 8/4/2008
857-252 Paetec Itel Quincy 4/23/2001
857-253 Paetec Itel Cambridge 4/23/2001
857-254 Paetec Itel Boston 4/23/2001
857-255 Paetec Itel Newton 4/23/2001
857-256 Peerless Network Of Massachusetts East Boston 11/24/2011
857-257 MetroPCS South Boston 4/20/2001
857-258 MetroPCS Boston 6/25/2010
857-259 New Cingular Wireless PCS Cambridge 5/24/2011
857-260 Cellco Partnership Boston 3/8/2012
857-261 MetroPCS Boston 2/22/2011
857-262 Cellco Partnership Boston 9/3/2015
857-263 Cellco Partnership Boston 7/12/2011
857-264 Omnipoint Miami E License Boston 9/21/2010
857-265 New Cingular Wireless PCS Boston 7/12/2011
857-266 MetroPCS Boston 6/10/2010
857-267 Comcast IP Phone Milton 7/15/2013
857-268 Cellco Partnership Boston 9/8/2011
857-269 Peerless Network Of Massachusetts Roxbury 4/24/2013
857-270 Cellco Partnership Cambridge 9/30/2014
857-271 Onvoy Dorchester 6/28/2013
857-272 New Cingular Wireless PCS Boston 3/1/2006
857-273 Comcast IP Phone Jamaica Plain 4/23/2013
857-274 Cellco Partnership Boston 1/29/2016
857-275 Cellco Partnership Boston 7/1/2015
857-276 Cellco Partnership Boston 8/17/2015
857-277 Omnipoint Miami E License Boston 1/3/2006
857-278 Cellco Partnership Boston 7/1/2015
857-279 Cellco Partnership Newton 1/29/2016
857-280 Onvoy Brighton 2/26/2016
857-281 Cellco Partnership Quincy 8/19/2020
857-282 Verizon New England Boston 11/4/2015
857-283 Cellco Partnership Boston 4/27/2017
857-284 Omnipoint Miami E License Boston 1/15/2008
857-285 Paetec Itel Cambridge 8/16/2012
857-286 Cellco Partnership Boston 4/28/2017
857-287 MetroPCS Boston 1/31/2017
857-288 MCIMetro Access Transmission Services Boston 8/1/2006
857-289 Onvoy Boston 5/1/2017
857-290 Cellco Partnership Newton 5/16/2017
857-291 Cellco Partnership Boston 8/7/2017
857-292 Cellco Partnership Boston 8/8/2017
857-293 Paetec Itel East Boston 2/15/2010
857-294 Cellco Partnership Boston 5/11/2007
857-295 Cellco Partnership Boston 8/8/2017
857-296 Level 3 Communications Boston 8/16/2017
857-297 Comcast IP Phone Newton 8/22/2017
857-298 Onvoy Spectrum Cambridge 9/22/2017
857-299 Onvoy Belmont 9/22/2017
857-300-XXXX --- 857-399-XXXX
NPANXX Carrier1 Area Served2 Date3
857-300 Cellco Partnership Boston 10/8/2010
857-301 Cellco Partnership Boston 12/6/2012
857-302 Airus Boston 8/4/2014
857-303 Cellco Partnership Boston 11/8/2012
857-304 Tc Systems Watertown 3/13/2013
857-305 Level 3 Communications Boston 7/19/2013
857-306 Centurylink Communications Boston 10/17/2017
857-307 Verizon New England Brookline 2/10/2006
857-308 Omnipoint Miami E License Roxbury 9/16/2014
857-309 Onvoy Dorchester 12/16/2014
857-310 Omnipoint Miami E License Boston 10/14/2014
857-312 MetroPCS Boston 8/4/2008
857-313 Omnipoint Miami E License Boston 10/23/2012
857-314 Bandwidth.com Clec Milton 1/28/2015
857-315 Centurylink Communications Boston 10/17/2017
857-316 Omnipoint Miami E License Brighton 2/27/2015
857-317 Centurylink Communications Boston 3/7/2013
857-318 MCIMetro Access Transmission Services Boston 10/17/2007
857-319 Cellco Partnership Boston 6/4/2015
857-320 Omnipoint Miami E License Cambridge 10/14/2014
857-321 Cellco Partnership Boston 3/10/2011
857-322 Comcast IP Phone East Boston 10/27/2017
857-323 Verizon New England Chelsea 1/22/2013
857-324 Cellco Partnership Boston 12/6/2017
857-325 Cellco Partnership Newton 3/31/2015
857-326 Cellco Partnership Boston 12/6/2017
857-327 Cellco Partnership Boston 2/2/2015
857-328 Voip Innovations Boston 6/25/2019
857-329 Cellco Partnership Boston 12/29/2017
857-330 Cellco Partnership Boston 10/1/2014
857-331 Cellco Partnership Cambridge 7/22/2015
857-332 Cellco Partnership Boston 1/15/2018
857-333 Omnipoint Miami E License Boston 11/9/2010
857-334 Omnipoint Miami E License Boston 9/20/2006
857-335 Csc Wireless Boston 6/6/2019
857-336 Onvoy Winthrop 3/1/2016
857-337 Cellco Partnership Brookline 10/7/2015
857-338 Tc Systems Boston 1/25/2018
857-339 Commio Roxbury 02/09/2024
857-340 Omnipoint Miami E License Brookline 9/29/2020
857-341 Bandwidth.com Clec Belmont 2/7/2019
857-342 Cellco Partnership Hyde Park 8/8/2007
857-343 Cellco Partnership Boston 2/13/2018
857-344 Cellco Partnership Quincy 4/9/2018
857-345 Cellco Partnership Hyde Park N/A
857-346 Telengy Boston 5/23/2018
857-347 Advanced Telecom Solutions Boston 7/13/2018
857-348 New Cingular Wireless PCS Boston 8/13/2018
857-349 Bandwidth.com Clec Winthrop 9/20/2018
857-350 Cellco Partnership Boston 6/18/2007
857-351 Omnipoint Miami E License Roxbury 05/17/2024
857-352 Omnipoint Miami E License Brookline 1/22/2015
857-353 MCIMetro Access Transmission Services Boston 1/6/2020
857-354 Omnipoint Miami E License Boston 11/21/2018
857-355 Airus Everett 10/7/2019
857-356 Omnipoint Miami E License Boston 10/11/2019
857-357 Megaphone Cambridge 12/24/2019
857-358 New Cingular Wireless PCS Quincy 3/23/2020
857-359 Cellco Partnership Quincy 3/24/2020
857-360 Cellco Partnership Boston 10/7/2015
857-361 Omnipoint Miami E License Brookline N/A
857-362 Verizon New England Boston 7/19/2006
857-363 Cellco Partnership Everett 4/24/2001
857-364 Paetec Itel Brookline 3/20/2001
857-365 Nuso Boston 5/29/2020
857-366 Cellco Partnership Boston 3/15/2006
857-367 Tc Systems Watertown 10/5/2020
857-368 Paetec Itel Boston 8/2/2011
857-369 Level 3 Communications Boston 12/21/2020
857-370 Omnipoint Miami E License Brookline 3/26/2021
857-371 Onvoy Watertown 4/19/2021
857-372 Cellco Partnership Quincy 5/17/2021
857-373 Paetec Itel Belmont 3/20/2001
857-374 Onvoy Quincy 6/14/2021
857-375 Onvoy Dorchester 6/14/2021
857-376 Omnipoint Miami E License Brookline 6/29/2021
857-377 Paetec Itel Boston 4/9/2014
857-378 Verizon New England Boston 2/1/2017
857-379 Commio Roxbury 7/28/2021
857-380 Onvoy East Boston 5/13/2020
857-381 Omnipoint Miami E License Brookline 9/9/2021
857-382 Onvoy East Boston 6/14/2021
857-383 Tc Systems Boston 11/1/2005
857-384 Onvoy Brighton 7/16/2021
857-385 New Cingular Wireless PCS Dorchester 6/1/2016
857-386 Verizon New England Chelsea 8/4/2016
857-387 Comcast IP Phone Quincy 9/10/2021
857-388 Commio Somerville 9/24/2021
857-389 Omnipoint Miami E License Charlestown 12/14/2001
857-390 Omnipoint Miami E License Brookline 10/7/2021
857-391 Omnipoint Miami E License Charlestown 12/3/2021
857-392 Onvoy Jamaica Plain 6/14/2021
857-393 Cellco Partnership Boston 1/23/2017
857-394 MCIMetro Access Transmission Services Belmont 12/8/2021
857-395 Omnipoint Miami E License Roxbury 1/27/2022
857-396 Omnipoint Miami E License Brookline 7/28/2022
857-397 Omnipoint Miami E License Roxbury 7/28/2022
857-398 Omnipoint Miami E License Roxbury 9/21/2022
857-399 Bandwidth.com Clec Roxbury 6/29/2001
857-400-XXXX --- 857-499-XXXX
NPANXX Carrier1 Area Served2 Date3
857-400 Bandwidth.com Clec Boston 11/3/2010
857-401 Paetec Itel South Boston 3/20/2001
857-402 HD Carrier East Boston N/A
857-403 Paetec Itel Quincy 3/20/2001
857-404 Comcast IP Phone Newton 6/15/2007
857-405 Omnipoint Miami E License Brookline 11/8/2022
857-406 Cellco Partnership Boston 11/16/2015
857-407 New Cingular Wireless PCS Roxbury 6/1/2015
857-408 Cellco Partnership Boston 11/25/2015
857-409 Cellco Partnership Boston 9/21/2016
857-410 Bandwidth.com Clec Charlestown 8/12/2016
857-412 Onvoy Cambridge N/A
857-413 Level 3 Communications Boston 9/19/2005
857-414 HD Carrier Brighton N/A
857-415 Vonage America Boston 7/3/2013
857-416 U.S. Telepacific Corp. Boston 11/17/2022
857-417 MetroPCS Boston 8/4/2008
857-418 U.S. Telepacific Corp. Dorchester 11/17/2022
857-419 New Cingular Wireless PCS Milton 8/8/2016
857-420 Onvoy Cambridge 11/23/2022
857-421 Omnipoint Miami E License Brookline 07/01/2024
857-422 Onvoy South Boston 6/14/2021
857-423 Omnipoint Miami E License Brookline 9/12/2019
857-424 New Cingular Wireless PCS Roxbury 10/25/2016
857-425 New Cingular Wireless PCS Brighton 9/6/2016
857-426 Omnipoint Miami E License Brookline 11/01/2024
857-427 Omnipoint Miami E License Boston 11/01/2024
857-428 Onvoy Everett 06/09/2023
857-429 Omnipoint Miami E License Roxbury 11/01/2024
857-430 New Cingular Wireless PCS Boston 11/13/2024
857-431 Wavenation Boston 07/10/2025
857-437 Omnipoint Miami E License Roxbury 9/12/2019
857-443 Commio Boston 5/22/2017
857-444 Peerless Network Of Massachusetts Boston 11/22/2010
857-445 New Cingular Wireless PCS Boston 3/21/2006
857-449 Comcast IP Phone Boston 4/2/2002
857-452 Omnipoint Miami E License Charlestown N/A
857-453 Level 3 Communications Boston 5/19/2005
857-465 Fractel Boston 5/8/2020
857-466 Ton80 Communications Hyde Park 2/7/2022
857-467 Ton80 Communications Somerville 2/24/2022
857-468 Ton80 Communications Charlestown 2/11/2022
857-472 New Cingular Wireless PCS Boston 12/17/2001
857-475 Onvoy Chelsea 4/1/2021
857-477 Onvoy Jamaica Plain 2/10/2016
857-488 Cellco Partnership Boston 9/13/2005
857-491 Lightpath Of New England Boston 9/23/2021
857-492 Omnipoint Miami E License Roxbury 7/30/2002
857-496 Comcast IP Phone South Boston 11/17/2004
857-497 Omnipoint Miami E License Charleston 08/17/2023
857-498 New Cingular Wireless PCS Brighton 8/24/2001
857-499 New Cingular Wireless PCS Quincy 3/29/2001
857-500-XXXX --- 857-598-XXXX
NPANXX Carrier1 Area Served2 Date3
857-500 Cellco Partnership Cambridge 4/17/2011
857-504 Level 3 Communications Boston 9/1/2015
857-505 MetroPCS Boston 9/21/2016
857-506 Omnipoint Miami E License Roxbury 10/06/2023
857-507 Cellco Partnership Boston 9/21/2016
857-520 Onvoy Hyde Park N/A
857-523 Cellco Partnership Somerville 5/3/2001
857-524 MCIMetro Access Transmission Services South Boston 3/27/2001
857-526 MetroPCS Quincy 7/30/2002
857-529 Cellco Partnership Cambridge 2/3/2015
857-540 Omnipoint Miami E License Brighton N/A
857-544 Omnipoint Miami E License Roxbury 11/28/2001
857-547 Paetec Itel Jamaica Plain 3/20/2001
857-550 Commio Belmont 09/26/2023
857-557 HD Carrier Boston 8/27/2019
857-559 MCIMetro Access Transmission Services Brighton 3/27/2001
857-565 Omnipoint Miami E License Brookline 11/09/2023
857-567 Onvoy Dorchester 5/15/2020
857-574 Paetec Itel East Boston 3/20/2001
857-575 Onvoy Somerville 4/1/2021
857-576 Bandwidth.com Clec Brookline 5/18/2001
857-577 Onvoy Charlestown 2/11/2016
857-578 Twilio International Newton 10/9/2020
857-579 Omnipoint Miami E License Boston 01/07/2025
857-587 HD Carrier Dorchester 1/29/2016
857-588 MCIMetro Access Transmission Services Charlestown 3/27/2001
857-597 Onvoy Winthrop 4/1/2021
857-598 MCIMetro Access Transmission Services Milton 3/20/2001
857-600-XXXX --- 857-693-XXXX
NPANXX Carrier1 Area Served2 Date3
857-600 Bandwidth.com Clec Cambridge 4/6/2011
857-605 Omnipoint Miami E License Brighton 10/11/2023
857-615 MetroPCS Boston 6/11/2009
857-626 MCIMetro Access Transmission Services Belmont 6/29/2001
857-636 Cellco Partnership Newton 7/6/2001
857-639 Ton80 Communications Cambridge 2/15/2022
857-654 Omnipoint Miami E License Boston 10/17/2006
857-656 Omnipoint Miami E License Boston 11/21/2024
857-663 Onvoy Dorchester 3/20/2017
857-666 Onvoy Brookline 3/23/2015
857-675 Onvoy Roxbury 4/2/2021
857-678 Onvoy Belmont 4/2/2021
857-688 Fractel Dorchester 10/26/2021
857-693 Ton80 Communications Roxbury 2/15/2022
857-701-XXXX --- 857-799-XXXX
NPANXX Carrier1 Area Served2 Date3
857-701 Omnipoint Miami E License Roxbury 1/15/2014
857-702 Nuso Boston 2/7/2014
857-703 Cellco Partnership Hyde Park 7/28/2014
857-706 Level 3 Communications Cambridge 7/31/2014
857-707 Cellco Partnership Brookline 10/10/2014
857-719 MetroPCS Jamaica Plain 7/30/2002
857-728 MCIMetro Access Transmission Services Jamaica Plain 3/27/2001
857-737 Ton80 Communications Watertown 3/22/2022
857-746 Ton80 Communications Brookline 2/9/2022
857-753 Cellco Partnership Boston 8/9/2005
857-754 Onvoy Quincy 12/8/2020
857-755 Fractel Quincy 9/3/2020
857-756 Metropolitan Telecommunications Of Mass Cambridge 7/26/2005
857-757 The Voice Application Network Cambridge 3/9/2015
857-758 Fractel Boston 4/27/2021
857-760 Bandwidth.com Clec Watertown 6/21/2016
857-762 MetroPCS Boston 7/18/2016
857-763 Omnipoint Miami E License Boston 7/22/2016
857-766 Fractel South Boston 7/21/2020
857-767 Ton80 Communications Boston 1/7/2022
857-770 Intrado Communications Boston 12/23/2014
857-772 Cellco Partnership Boston 7/27/2016
857-773 MetroPCS Jamaica Plain 9/12/2016
857-776 Level 3 Communications Chelsea 6/29/2001
857-777 Peerless Network Of Massachusetts Cambridge 3/5/2012
857-788 Skye Telecom Boston 8/20/2021
857-799 HD Carrier Cambridge 11/6/2018
857-800-XXXX --- 857-895-XXXX
NPANXX Carrier1 Area Served2 Date3
857-800 Onvoy Boston 3/20/2015
857-810 Onvoy Boston 3/11/2021
857-816 MCIMetro Access Transmission Services Winthrop 3/20/2001
857-822 Onvoy Spectrum Somerville 11/07/2024
857-829 Omnipoint Miami E License Cambridge 8/13/2002
857-832 Ton80 Communications Brighton 2/11/2022
857-833 Onvoy Spectrum Winthrop 11/07/2024
857-837 Onvoy Charlestown 5/28/2020
857-847 Onvoy Spectrum Dorchester 3/17/2021
857-855 Onvoy Boston 1/25/2021
857-856 Onvoy Cambridge 3/18/2015
857-857 Onvoy Spectrum Newton 11/07/2024
857-858 Onvoy Newton 5/13/2020
857-867 Onvoy Spectrum Brookline 3/17/2021
857-869 Omnipoint Miami E License Boston 7/23/2007
857-877 Onvoy Brighton 5/13/2020
857-880 Barr Tell USA Boston 11/23/2015
857-887 Onvoy Spectrum Jamaica Plain 12/18/2020
857-888 MetroPCS Everett 7/30/2002
857-891 Omnipoint Miami E License Boston 4/2/2001
857-895 Rclec Boston 2/2/2017
857-919-XXXX --- 857-999-XXXX
NPANXX Carrier1 Area Served2 Date3
857-919 Omnipoint Miami E License Brighton 4/2/2001
857-928 Omnipoint Miami E License Cambridge 8/3/2001
857-930 Rclec Boston 6/10/2014
857-939 Cellco Partnership Quincy 6/15/2001
857-944 New Cingular Wireless PCS Boston 11/12/2024
857-957 Wide Voice Boston 9/30/2014
857-961 Omnipoint Miami E License Brighton 01/09/2023
857-971 Onvoy Charlestown 5/9/2016
857-972 Level 3 Communications Boston 7/29/2015
857-989 New Cingular Wireless PCS Newton 11/11/2024
857-990 Evolve Cellular Boston 9/22/2015
857-991 Comcast IP Phone Boston 6/19/2001
857-994 Dish Wireless Newton 05/06/2025
857-995 Onvoy Somerville 3/29/2001
857-996 MCIMetro Access Transmission Services Boston N/A
857-997 HD Carrier Somerville 5/18/2001
857-998 Cellco Partnership Cambridge 5/3/2001
857-999 Peerless Network Of Massachusetts Cambridge 5/23/2012
  1. NPA-NXX assigned carrier; with Number Pooling thousand block numbers are often assigned to other carriers as well; moreover, phone numbers can be ported between service providers
  2. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  3. Assignment date. N/A - mostly central office codes assigned before 2001.
  4. NXX prefixes last updated: November 22, 2025

Cities in area code 857

City1 County Time Zone1
Allston Suffolk E
Auburndale Middlesex E
Boston Suffolk E
Brighton Suffolk E
Brookline Norfolk E
Brookline Village Norfolk E
Cambridge Middlesex E
Charlestown Suffolk E
Chelsea Suffolk E
Chestnut Hill Middlesex E
East Boston Suffolk E
Everett Middlesex E
Hyde Park Suffolk E
Jamaica Plain Suffolk E
Mattapan Suffolk E
Milton Norfolk E
Milton Village Norfolk E
Needham Heights Norfolk E
New Town Middlesex E
Newton Middlesex E
Newton Center Middlesex E
Newton Highlands Middlesex E
Newton Lower Falls Middlesex E
Newton Upper Falls Middlesex E
Newtonville Middlesex E
Nonantum Middlesex E
North Waltham Middlesex E
Quincy Norfolk E
Readville Suffolk E
Roslindale Suffolk E
Somerville Middlesex E
Waban Middlesex E
Watertown Middlesex E
West Newton Middlesex E
West Roxbury Suffolk E
Winthrop Suffolk E
  1. Listed above are most places served by USA area code 857. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. E stands for Eastern Time (currently ).
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