Area code 857 covers part of Massachusettsstate, covering most of Middlesex, Suffolk, Norfolk counties. It was started on May 02, 2001. This region follows US/Eastern + Daylight Savings timezone. Other popular area codes that belong to Massachusetts state include 339, 351, 413, 508, 617, 774, 781, 978.
| Date Changed | Change Details |
| Mar 17, 2014 | Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-997 was assigned on Mar 20, 2001 and is operational from Mar 17, 2014. |
| Dec 04, 2013 | Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-999 was assigned on Nov 20, 2013 and is operational from Dec 04, 2013. |
| Oct 29, 2013 | Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-991 was assigned on Jun 19, 2001 and is operational from Oct 29, 2013. |
| Aug 14, 2013 | Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-998 was assigned on Sep 09, 2005 and is operational from Aug 14, 2013. |
| Area Code | City | County | Population | Network Operator |
| 857-900 | 725,902 | Verizon New England Inc | ||
| 857-911 | 842,913 | Emergency Services | ||
| 857-919-0 | Norton | Suffolk | 722,023 | Omnipoint Miami E License LLC |
| 857-920 | Middlesex | 150,308 | Verizon New England Inc | |
| 857-928-0 | Norton | Middlesex | 150,308 | Omnipoint Miami E License LLC |
| 857-931 | Cambridge | Suffolk | 722,023 | Verizon New England Inc |
| 857-939-0 | Roslindale | Norfolk | 670,850 | Cellco Partnership dba Verizon Wireless - MA |
| 857-950 | 893,952 | FGB Access Code | ||
| 857-958 | 771,960 | Standard Plant Test Code | ||
| 857-959 | 417,961 | Standard Plant Test Code | ||
| 857-991-0 | Chelmsford | Suffolk | 722,023 | Comcast Phone of Massachusetts Inc - MA |
| 857-991-9 | Norton | Suffolk | 722,023 | Omnipoint Miami E License LLC |
| 857-991-5 | Woburn | Suffolk | 722,023 | Sprint Spectrum LP |
| 857-995-0 | Cambridge | Middlesex | 150,308 | Broadwing Communications LLC - MA |
| 857-995-1 | Cambridge | Middlesex | 150,308 | CTC Communications Corporation - MA |
| 857-995-0 | Somerville | Middlesex | 150,308 | Verizon New England Inc |
| 857-996-0 | Boston | Suffolk | 722,023 | Verizon New England Inc |
| 857-997-2 | Boston | Middlesex | 150,308 | Bandwidth.com CLEC LLC - MA |
| 857-997-0 | Somerville | Middlesex | 150,308 | Local Access LLC - MA |
| 857-998-6 | Cambridge | Middlesex | 150,308 | Broadwing Communications LLC - MA |
| 857-998-0 | Roslindale | Middlesex | 150,308 | Cellco Partnership dba Verizon Wireless - MA |
| 857-999-2 | Chelmsford | Middlesex | 150,308 | Comcast Phone of Massachusetts Inc - MA |
| 857-999-8 | Norton | Middlesex | 150,308 | Omnipoint Miami E License LLC |
| 857-999-0 | Somerville | Middlesex | 150,308 | Peerless Network of Massachusetts LLC - MA |
| 857-999-0 | Somerville | Middlesex | 150,308 | Vonage Network Inc |
| No reviews yet. |
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