857 Area Code Area Codes

Area Code: 857
State/Region: Massachusetts
Major Cities: Boston
Time Zone: Eastern
Current Time: 2:04 PM
Date Assigned: 5/3/2000
In Service Since: 5/2/2001
Overlay?: Yes
Overlay Complex: 617/857
Local Call Dialing: 10D
Toll Call Dialing: 1+10D

857 Prefixes/Exchanges

The three digits following the area code of a phone number are known as the prefix or exchange. The remaining numbers (last 4 digits) all refer to that prefix/exhange.

View Area Code 857 Prefixes »

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