Learn about the 857 area code, including its location, cities, time zone, introduction date, and related area codes.
857 Area Code Details
Major Cities in the 857 Area Code
The 857 area code is associated with the following cities and communities:
- Belmont
- Brookline
- Cambridge
- Chelsea
- Everett
- Milton
- Newton
- Quincy
- Somerville
- South Boston
- Watertown
Where Is Area Code 857 Located?
The 857 area code serves communities in Massachusetts. The exact communities and numbering assignments can change as telephone numbering resources are updated.
857 Area Code Time Zone
The 857 area code is associated with the Eastern time zone.
When Was 857 Area Code Introduced?
The 857 area code was introduced in 02-May-2001.
How to Call a 857 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
Related Area Codes
857 Area Code FAQ
What state is 857 area code in?
The 857 area code is associated with Massachusetts.
What time zone is 857 area code in?
The 857 area code is associated with Eastern.
What cities use 857 area code?
Belmont|Brookline|Cambridge|Chelsea|Everett|Milton|Newton|Quincy|Somerville|South Boston|Watertown
More Questions About Area Code 857
What state is area code 857 in?
Area code 857 is associated with Massachusetts.
What time zone is area code 857 in?
The listed time zone for area code 857 is Eastern.