Area code 857 covers part of Massachusettsstate, covering most of Suffolk, Middlesex 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|
|Dec 04, 2013||Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-829 was assigned on Nov 20, 2013 and is operational from Dec 04, 2013.|
|Dec 03, 2012||Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-816 was assigned on Oct 18, 2012 and is operational from Dec 03, 2012.|
|Sep 14, 2007||Area code 617 subscribers are now overlayed with area code 857. Subscriber area code 857-869 was assigned on Aug 14, 2007 and is operational from Sep 14, 2007.|
|Area Code||City||County||Population||Network Operator|
|857-811||128,813||One Call Services-Pipeline And Utility Safety|
|857-814||Cambridge||363,816||Verizon New England Inc|
|857-816-2||Boston||Suffolk||722,023||Cbeyond Communications LLC - MA|
|857-816-3||Cambridge||Suffolk||722,023||Level 3 Communications LLC - MA|
|857-816-0||Cambridge||Suffolk||722,023||XO Massachusetts Inc|
|857-816-5||Charlestown||Suffolk||722,023||Broadview Networks Inc - MA|
|857-816-6||Worcester||Suffolk||722,023||Teleport Communications America LLC - MA|
|857-829-3||Boston||Middlesex||150,308||Comcast Phone of Massachusetts Inc - MA|
|857-829-5||Boston||Middlesex||150,308||Paetec Communications Inc - MA|
|857-829-9||Norton||Middlesex||150,308||Omnipoint Miami E License LLC|
|857-829-0||Woburn||Middlesex||150,308||Sprint Spectrum LP|
|857-857||842,859||Unavailable For Assignment|
|857-869-0||Norton||Suffolk||722,023||Omnipoint Miami E License LLC|
|857-888||Woburn||Middlesex||150,308||Sprint Spectrum LP|
|857-891||Norton||Suffolk||722,023||Omnipoint Miami E License LLC|
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