857 Area Code

Area Code	857
State	Massachusetts
Country	United State
Code Type	General Purpose Code
In Service	Yes
Timezone	Eastern Standard Time (EST)
Overlay Complex	617/857
Assignment Date	03-MAY-00
In Service Date	02-MAY-01
Area Code	857

What is the 857 Area Code?

Area code 857 is located in Massachusetts, within United State, serving the region's residents and businesses. The 857 area code was first assigned in 03-MAY-00 and has been in service since 02-MAY-01.

The 857 area code is part of an overlay complex, which includes the area codes 617/857. These codes all serve the same geographic region.

Cities in Area Code 857

Belmont

Boston

Brookline

Cambridge

Chelsea

Everett

Milton

Newton

Quincy

Somerville

Watertown Town

Winthrop Town

Area codes of Massachusetts

Further Details on the 857 Area Code

Where is the 857 Area Code Located?

Area code 857 serves the entire state of Massachusetts in United State, providing phone services to both residential and business users. It covers urban, suburban, and rural areas alike, ensuring reliable communication across the region.

What time zone is area code 857 in?

Area code 857 is located in the Eastern Standard Time (EST) time zone. This designation indicates the predominant time zone for calls made within this area code.

When was area code 857 assigned and put into service?

Area code 857 was officially assigned on 03-MAY-00, signifying its designation for use in telecommunications, and it became operational on 02-MAY-01, allowing callers to begin using this area code for their dialing needs.

Is the 857 Area Code Still Active?

Yes, the 302 area code is still active and in service. It is the primary area code for all landline and mobile phones registered in Delaware. There are no overlay codes currently in place for the state.

What are the dialing requirements for making calls with area code 857?

For local calls within area code 857, the required dialing pattern is 10D. For toll calls, you'll need to dial 1+10D , where "D" indicates the number of digits to dial. When calling foreign NPAs from area code 857, local calls require 10D, and toll calls use 1+10D.

Data Sources: NANPA Area Code, U.S. Area Code Map