Located in the Eastern (GMT -05:00) time zone. Area code 857 serves the state of Massachusetts. This area code was assigned on May 3rd, 2000. On May 2nd, 2001 it went into service. 857 is a General Purpose Code. 857 service area does overlap with 617 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.
Information for Area Code 857
Area Code
857
Country
United States
State
Massachusetts (MA)
Major City
Boston
Time Zone
Eastern (GMT -05:00)
List of Cities in Area Code Overlay Complex 270
Jamaica Plain
Boston
Charlestown
Brighton
Roxbury
Milton
South Boston
Cambridge
Quincy
Somerville
Hyde Park
Bedford
Needham Heights
Brookline
Malden
Chestnut Hill
Dorchester
Chelsea
Newton
East Boston
Suffolk
Everett
Belmont
Winthrop
Watertown
Middlesex
List of Zip Codes in Area Code 857
2108
2110
2133
2152
2111
2130
2199
2115
2215
2284
2283
2138
2163
2139
2122
2125
2121
2446
2445
2467
2142
2141
2458
2460
2465
2144
2145
2143
2472
2119
2118
2120
2222
2114
2203
2129
2116
2171
2169
2170
2127
2135
2128
2134
2150
2136
2149
2148
2492
2494
2186
1730
1731
2126
2210
2478
SPs and Telephone companies in Area Code 270
Broadview Networks, Inc. - Ma
Neutral Tandem-massachusetts, Llc - Ma
New Cingular Wireless Pcs, Llc - Dc
Broadwing Communications, Llc - Ma
Sprint Spectrum L.p.
Comcast Phone Of Massachusetts, Inc. - Ma
Peerless Network Of Massachusetts, Llc - Ma
Commio, Llc
Metro Pcs, Inc.
Vonage Network Inc.
Cellco Partnership Dba Verizon Wireless - Ma
Omnipoint Miami E License, Llc
Allegiance Telecom, Inc. - Ma
Mosaic Networx Llc - Ma
Wide Voice, Llc - Ma
Verizon New England Inc.
Paetec Communications, Inc.- Ma
Tc Systems, Inc.
Bandwidth.com Clec, Llc - Ma
Local Access Llc - Ma
Cellco Partnership Dba Verizon Wireless - MA
Rclec, Inc. - Ma
Barr Tell Usa, Inc. - Ma
Broadvox-clec, Llc - Ma
Xo Massachusetts, Inc.
Multiple Ocn Listing
Level 3 Communications, Llc - Ma
Comcast Phone Of Massachusetts, Inc. - MA
Centurylink Communications Llc
Mci Worldcom Communications, Inc. - Ma
Worldcall Interconnect Inc.
Dsci, Llc
Ctc Communications Corp. - Ma
365 Wireless, Llc
West Telecom Services, Llc - Ma
Metropolitan Telecommunications Of Mass Dba Mettel