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

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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 360 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 Area served[1] Provider[2] Date[3]
857-200 Boston Multiple 1/10/2011
857-201 Winthrop Multiple 10/28/2002
857-202 Boston Multiple 11/10/2011
857-203 Jamaica Plain Multiple 2/28/2005
857-204 Boston Multiple 3/20/2001
857-205 Boston New Cingular Wireless PCS 3/19/2001
857-206 Boston Multiple 10/7/2011
857-207 Boston Multiple 4/11/2007
857-208 Boston Multiple 2/8/2012
857-209 Cambridge Multiple 10/11/2001
857-210 Boston Multiple 3/10/2011
857-212 Dorchester MetroPCS 4/23/2001
857-213 Boston Paetec Itel 10/3/2011
857-214 Boston Multiple 12/6/2011
857-215 Brookline Verizon New England 2/23/2010
857-216 Newton Multiple 11/3/2009
857-217 Dorchester Multiple 6/29/2001
857-218 Brookline Multiple 1/12/2007
857-219 Newton Onvoy 2/16/2012
857-220 Dorchester Multiple 3/20/2001
857-221 Boston Multiple 5/25/2005
857-222 Boston Omnipoint Miami E License 5/17/2001
857-223 Boston Paetec Itel N/A
857-224 Boston Verizon New England 12/17/2009
857-225 Brookline Multiple 5/3/2001
857-226 Newton Multiple 3/30/2006
857-227 Somerville Multiple 5/23/2001
857-228 Watertown Multiple 7/12/2001
857-229 Newton Multiple N/A
857-230 Roxbury Multiple 4/15/2009
857-231 Newton Multiple 7/30/2002
857-232 Newton Onvoy 5/17/2006
857-233 Boston Multiple 2/16/2006
857-234 Brookline Omnipoint Miami E License 3/18/2002
857-235 Cambridge Verizon New England 11/18/2008
857-236 Boston MetroPCS 8/4/2008
857-237 Boston MetroPCS 6/8/2009
857-238 Boston Verizon New England 11/14/2007
857-239 Boston Multiple N/A
857-240 Newton Multiple 2/28/2012
857-241 Boston Multiple 10/24/2006
857-242 Cambridge Multiple 9/8/2011
857-243 Boston Multiple 11/5/2009
857-244 Boston Multiple 6/10/2008
857-245 Brookline Multiple 11/2/2006
857-246 Boston Multiple N/A
857-247 Boston MetroPCS 6/8/2009
857-248 Boston Multiple 3/8/2012
857-249 Boston MetroPCS 8/4/2008
857-250 Boston Multiple 7/15/2011
857-251 Boston MetroPCS 8/4/2008
857-252 Quincy Multiple 4/23/2001
857-253 Cambridge Multiple 4/23/2001
857-254 Boston Multiple 4/23/2001
857-255 Newton Multiple 4/23/2001
857-256 East Boston Multiple 11/24/2011
857-257 South Boston Multiple 4/20/2001
857-258 Boston MetroPCS 6/25/2010
857-259 Cambridge Multiple 5/24/2011
857-260 Boston Multiple 3/8/2012
857-261 Boston MetroPCS 2/22/2011
857-262 Boston Multiple 9/3/2015
857-263 Boston Multiple 7/12/2011
857-264 Boston Multiple 9/21/2010
857-265 Boston Multiple 7/12/2011
857-266 Boston MetroPCS 6/10/2010
857-267 Milton Multiple 7/15/2013
857-268 Boston Multiple 9/8/2011
857-269 Roxbury Multiple 4/24/2013
857-270 Cambridge Multiple 9/30/2014
857-271 Dorchester Multiple 6/28/2013
857-272 Boston New Cingular Wireless PCS 3/1/2006
857-273 Jamaica Plain Multiple 4/23/2013
857-274 Boston Cellco Partnership 1/29/2016
857-275 Boston Cellco Partnership 7/1/2015
857-276 Boston Cellco Partnership 8/17/2015
857-277 Boston Multiple 1/3/2006
857-278 Boston Cellco Partnership 7/1/2015
857-279 Newton Multiple 1/29/2016
857-280 Brighton Multiple 2/26/2016
857-281 Quincy Cellco Partnership 8/19/2020
857-282 Boston Verizon New England 11/4/2015
857-283 Boston Cellco Partnership 4/27/2017
857-284 Boston Multiple 1/15/2008
857-285 Cambridge Multiple 8/16/2012
857-286 Boston Cellco Partnership 4/28/2017
857-287 Boston Multiple 1/31/2017
857-288 Boston Multiple 8/1/2006
857-289 Boston Multiple 5/1/2017
857-290 Newton Multiple 5/16/2017
857-291 Boston Cellco Partnership 8/7/2017
857-292 Boston Cellco Partnership 8/8/2017
857-293 East Boston Multiple 2/15/2010
857-294 Boston Multiple 5/11/2007
857-295 Boston Multiple 8/8/2017
857-296 Boston Multiple 8/16/2017
857-297 Newton Multiple 8/22/2017
857-298 Cambridge Multiple 9/22/2017
857-299 Belmont Multiple 9/22/2017
857-300-XXXX --- 857-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-300 Boston Multiple 10/8/2010
857-301 Boston Multiple 12/6/2012
857-302 Boston Multiple 8/4/2014
857-303 Boston Cellco Partnership 11/8/2012
857-304 Watertown Multiple 3/13/2013
857-305 Boston Multiple 7/19/2013
857-306 Boston Multiple 10/17/2017
857-307 Brookline Verizon New England 2/10/2006
857-308 Roxbury Multiple 9/16/2014
857-309 Dorchester Multiple 12/16/2014
857-310 Boston Multiple 10/14/2014
857-312 Boston MetroPCS 8/4/2008
857-313 Boston Multiple 10/23/2012
857-314 Milton Multiple 1/28/2015
857-315 Boston Multiple 10/17/2017
857-316 Brighton Multiple 2/27/2015
857-317 Boston Multiple 3/7/2013
857-318 Boston Multiple 10/17/2007
857-319 Boston Cellco Partnership 6/4/2015
857-320 Cambridge Multiple 10/14/2014
857-321 Boston Multiple 3/10/2011
857-322 East Boston Multiple 10/27/2017
857-323 Chelsea Multiple 1/22/2013
857-324 Boston Multiple 12/6/2017
857-325 Newton Multiple 3/31/2015
857-326 Boston Multiple 12/6/2017
857-327 Boston Multiple 2/2/2015
857-328 Boston Multiple 6/25/2019
857-329 Boston Cellco Partnership 12/29/2017
857-330 Boston Multiple 10/1/2014
857-331 Cambridge Multiple 7/22/2015
857-332 Boston Multiple 1/15/2018
857-333 Boston Multiple 11/9/2010
857-334 Boston Omnipoint Miami E License 9/20/2006
857-335 Boston Multiple 6/6/2019
857-336 Winthrop Multiple 3/1/2016
857-337 Brookline Multiple 10/7/2015
857-338 Boston Multiple 1/25/2018
857-339 Roxbury Multiple 02/09/2024
857-340 Brookline Multiple 9/29/2020
857-341 Belmont Multiple 2/7/2019
857-342 Hyde Park Multiple 8/8/2007
857-343 Boston Multiple 2/13/2018
857-344 Quincy Multiple 4/9/2018
857-345 Hyde Park Multiple N/A
857-346 Boston Multiple 5/23/2018
857-347 Boston Multiple 7/13/2018
857-348 Boston Multiple 8/13/2018
857-349 Winthrop Multiple 9/20/2018
857-350 Boston Multiple 6/18/2007
857-351 Roxbury Omnipoint Miami E License 05/17/2024
857-352 Brookline Multiple 1/22/2015
857-353 Boston Multiple 1/6/2020
857-354 Boston Multiple 11/21/2018
857-355 Everett Multiple 10/7/2019
857-356 Boston Multiple 10/11/2019
857-357 Cambridge Multiple 12/24/2019
857-358 Quincy Multiple 3/23/2020
857-359 Quincy Cellco Partnership 3/24/2020
857-360 Boston Cellco Partnership 10/7/2015
857-361 Brookline Multiple N/A
857-362 Boston Multiple 7/19/2006
857-363 Everett Multiple 4/24/2001
857-364 Brookline Multiple 3/20/2001
857-365 Boston Multiple 5/29/2020
857-366 Boston Multiple 3/15/2006
857-367 Watertown Multiple 10/5/2020
857-368 Boston Paetec Itel 8/2/2011
857-369 Boston Level 3 Communications 12/21/2020
857-370 Brookline Multiple 3/26/2021
857-371 Watertown Multiple 4/19/2021
857-372 Quincy Cellco Partnership 5/17/2021
857-373 Belmont Multiple 3/20/2001
857-374 Quincy Multiple 6/14/2021
857-375 Dorchester Multiple 6/14/2021
857-376 Brookline Multiple 6/29/2021
857-377 Boston Paetec Itel 4/9/2014
857-378 Boston Multiple 2/1/2017
857-379 Roxbury Multiple 7/28/2021
857-380 East Boston Multiple 5/13/2020
857-381 Brookline Multiple 9/9/2021
857-382 East Boston Multiple 6/14/2021
857-383 Boston Multiple 11/1/2005
857-384 Brighton Multiple 7/16/2021
857-385 Dorchester Multiple 6/1/2016
857-386 Chelsea Multiple 8/4/2016
857-387 Quincy Multiple 9/10/2021
857-388 Somerville Multiple 9/24/2021
857-389 Charlestown Omnipoint Miami E License 12/14/2001
857-390 Brookline Omnipoint Miami E License 10/7/2021
857-391 Charlestown Multiple 12/3/2021
857-392 Jamaica Plain Multiple 6/14/2021
857-393 Boston Multiple 1/23/2017
857-394 Belmont Multiple 12/8/2021
857-395 Roxbury Omnipoint Miami E License 1/27/2022
857-396 Brookline Multiple 7/28/2022
857-397 Roxbury Multiple 7/28/2022
857-398 Roxbury Multiple 9/21/2022
857-399 Roxbury Multiple 6/29/2001
857-400-XXXX --- 857-499-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-400 Boston Multiple 11/3/2010
857-401 South Boston Multiple 3/20/2001
857-402 East Boston Multiple N/A
857-403 Quincy Multiple 3/20/2001
857-404 Newton Multiple 6/15/2007
857-405 Brookline Multiple 11/8/2022
857-406 Boston Multiple 11/16/2015
857-407 Roxbury Multiple 6/1/2015
857-408 Boston Cellco Partnership 11/25/2015
857-409 Boston Multiple 9/21/2016
857-410 Charlestown Multiple 8/12/2016
857-412 Cambridge Onvoy N/A
857-413 Boston Multiple 9/19/2005
857-414 Brighton Multiple N/A
857-415 Boston Multiple 7/3/2013
857-416 Boston Multiple 11/17/2022
857-417 Boston MetroPCS 8/4/2008
857-418 Dorchester Multiple 11/17/2022
857-419 Milton Multiple 8/8/2016
857-420 Cambridge Onvoy 11/23/2022
857-421 Brookline Omnipoint Miami E License 07/01/2024
857-422 South Boston Multiple 6/14/2021
857-423 Brookline Multiple 9/12/2019
857-424 Roxbury Multiple 10/25/2016
857-425 Brighton Multiple 9/6/2016
857-426 Brookline Multiple 11/01/2024
857-427 Boston Multiple 11/01/2024
857-428 Everett Multiple 06/09/2023
857-429 Roxbury Multiple 11/01/2024
857-430 Boston New Cingular Wireless PCS 11/13/2024
857-431 Boston Multiple 07/10/2025
857-432 Brookline Omnipoint Miami E License N/A
857-437 Roxbury Multiple 9/12/2019
857-443 Boston Multiple 5/22/2017
857-444 Boston Peerless Network Of Massachusetts 11/22/2010
857-445 Boston Multiple 3/21/2006
857-449 Boston Comcast IP Phone 4/2/2002
857-452 Charlestown Multiple N/A
857-453 Boston Multiple 5/19/2005
857-465 Boston Multiple 5/8/2020
857-466 Hyde Park Multiple 2/7/2022
857-467 Somerville Multiple 2/24/2022
857-468 Charlestown Multiple 2/11/2022
857-472 Boston Multiple 12/17/2001
857-475 Chelsea Multiple 4/1/2021
857-477 Jamaica Plain Multiple 2/10/2016
857-488 Boston Multiple 9/13/2005
857-491 Boston Multiple 9/23/2021
857-492 Roxbury Multiple 7/30/2002
857-496 South Boston Multiple 11/17/2004
857-497 Charleston Multiple 08/17/2023
857-498 Brighton Multiple 8/24/2001
857-499 Quincy Multiple 3/29/2001
857-500-XXXX --- 857-598-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-500 Cambridge Multiple 4/17/2011
857-504 Boston Multiple 9/1/2015
857-505 Boston Multiple 9/21/2016
857-506 Roxbury Omnipoint Miami E License 10/06/2023
857-507 Boston Cellco Partnership 9/21/2016
857-520 Hyde Park Multiple N/A
857-523 Somerville Multiple 5/3/2001
857-524 South Boston Multiple 3/27/2001
857-526 Quincy Multiple 7/30/2002
857-529 Cambridge Multiple 2/3/2015
857-540 Brighton Multiple N/A
857-544 Roxbury Omnipoint Miami E License 11/28/2001
857-547 Jamaica Plain Multiple 3/20/2001
857-550 Belmont Multiple 09/26/2023
857-557 Boston Multiple 8/27/2019
857-559 Brighton Multiple 3/27/2001
857-565 Brookline Multiple 11/09/2023
857-567 Dorchester Onvoy 5/15/2020
857-574 East Boston Multiple 3/20/2001
857-575 Somerville Multiple 4/1/2021
857-576 Brookline Multiple 5/18/2001
857-577 Charlestown Multiple 2/11/2016
857-578 Newton Multiple 10/9/2020
857-579 Boston Omnipoint Miami E License 01/07/2025
857-587 Dorchester Multiple 1/29/2016
857-588 Charlestown Multiple 3/27/2001
857-597 Winthrop Multiple 4/1/2021
857-598 Milton Multiple 3/20/2001
857-600-XXXX --- 857-693-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-600 Cambridge Multiple 4/6/2011
857-605 Brighton Multiple 10/11/2023
857-615 Boston MetroPCS 6/11/2009
857-618 Brighton Omnipoint Miami E License N/A
857-626 Belmont Multiple 6/29/2001
857-636 Newton Cellco Partnership 7/6/2001
857-639 Cambridge Multiple 2/15/2022
857-654 Boston Multiple 10/17/2006
857-656 Boston Omnipoint Miami E License 11/21/2024
857-663 Dorchester Multiple 3/20/2017
857-666 Brookline Onvoy 3/23/2015
857-675 Roxbury Multiple 4/2/2021
857-678 Belmont Multiple 4/2/2021
857-688 Dorchester Multiple 10/26/2021
857-693 Roxbury Multiple 2/15/2022
857-701-XXXX --- 857-799-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-701 Roxbury Multiple 1/15/2014
857-702 Boston Multiple 2/7/2014
857-703 Hyde Park Multiple 7/28/2014
857-706 Cambridge Multiple 7/31/2014
857-707 Brookline Multiple 10/10/2014
857-719 Jamaica Plain Multiple 7/30/2002
857-728 Jamaica Plain Multiple 3/27/2001
857-737 Watertown Multiple 3/22/2022
857-746 Brookline Multiple 2/9/2022
857-753 Boston Multiple 8/9/2005
857-754 Quincy Multiple 12/8/2020
857-755 Quincy Multiple 9/3/2020
857-756 Cambridge Multiple 7/26/2005
857-757 Cambridge Multiple 3/9/2015
857-758 Boston Multiple 4/27/2021
857-760 Watertown Multiple 6/21/2016
857-762 Boston Multiple 7/18/2016
857-763 Boston Multiple 7/22/2016
857-766 South Boston Multiple 7/21/2020
857-767 Boston Multiple 1/7/2022
857-770 Boston Multiple 12/23/2014
857-772 Boston Multiple 7/27/2016
857-773 Jamaica Plain Multiple 9/12/2016
857-776 Chelsea Multiple 6/29/2001
857-777 Cambridge Multiple 3/5/2012
857-788 Boston Multiple 8/20/2021
857-799 Cambridge Multiple 11/6/2018
857-800-XXXX --- 857-895-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-800 Boston Multiple 3/20/2015
857-810 Boston Onvoy 3/11/2021
857-816 Winthrop Multiple 3/20/2001
857-822 Somerville Onvoy Spectrum 11/07/2024
857-829 Cambridge Multiple 8/13/2002
857-832 Brighton Multiple 2/11/2022
857-833 Winthrop Onvoy Spectrum 11/07/2024
857-837 Charlestown Multiple 5/28/2020
857-847 Dorchester Multiple 3/17/2021
857-855 Boston Onvoy 1/25/2021
857-856 Cambridge Multiple 3/18/2015
857-857 Newton Multiple 11/07/2024
857-858 Newton Multiple 5/13/2020
857-867 Brookline Multiple 3/17/2021
857-869 Boston Omnipoint Miami E License 7/23/2007
857-877 Brighton Multiple 5/13/2020
857-880 Boston Multiple 11/23/2015
857-887 Jamaica Plain Multiple 12/18/2020
857-888 Everett MetroPCS 7/30/2002
857-891 Boston Omnipoint Miami E License 4/2/2001
857-895 Boston Multiple 2/2/2017
857-919-XXXX --- 857-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
857-919 Brighton Omnipoint Miami E License 4/2/2001
857-928 Cambridge Omnipoint Miami E License 8/3/2001
857-930 Boston Multiple 6/10/2014
857-939 Quincy Cellco Partnership 6/15/2001
857-944 Boston New Cingular Wireless PCS 11/12/2024
857-957 Boston Multiple 9/30/2014
857-961 Brighton Multiple 01/09/2023
857-971 Charlestown Multiple 5/9/2016
857-972 Boston Multiple 7/29/2015
857-989 Newton New Cingular Wireless PCS 11/11/2024
857-990 Boston Multiple 9/22/2015
857-991 Boston Multiple 6/19/2001
857-994 Newton Dish Wireless 05/06/2025
857-995 Somerville Multiple 3/29/2001
857-996 Boston MCIMetro Access Transmission Services N/A
857-997 Somerville Multiple 5/18/2001
857-998 Cambridge Multiple 5/3/2001
857-999 Cambridge Multiple 5/23/2012
  1. 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.
  2. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: February 13, 2026

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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