857 Area Code

The 857 area code is a telephone area code in the state of Massachusetts, USA. It was introduced in 2001 as an overlay for the 617 area code. The 857 area code serves the greater Boston area, including cities and neighborhoods such as Boston, Cambridge, Quincy, and Brookline.

Understanding the 857 Area Code

The 857 area code covers a densely populated metropolitan area in eastern Massachusetts. It serves residential, commercial, and educational regions. This area includes major universities, hospitals, financial centers, and government offices. The overlay was implemented to provide additional numbering resources due to growing demand in the Boston metro region.

857 Area Code Map and Location

The 857 area code map spans several counties, including:

• Suffolk County
• Middlesex County (partial)
• Norfolk County (partial)

Major Cities in the 857 Area Code

• Boston
• Cambridge
• Quincy
• Brookline
• Newton
• Somerville
• Medford
• Watertown
• Waltham
• Revere

ZIP Codes in the 857 Area Code

Some common ZIP codes include:

• 02108 - Boston, MA
• 02138 - Cambridge, MA
• 02169 - Quincy, MA
• 02445 - Brookline, MA
• 02459 - Newton, MA
• 02143 - Somerville, MA
• 02155 - Medford, MA
• 02472 - Watertown, MA
• 02452 - Waltham, MA
• 02151 - Revere, MA

Time Zone

The 857 area code is located in the Eastern Time Zone (ET):

• Standard Time: UTC -5
• Daylight Saving Time: UTC -4

Dialing & Phone Service

• Overlay Code: 857 (overlays 617)
• Local Dialing: 10-digit dialing is required
• Long-Distance: 1 + 857 + 7-digit number
• International: +1 857 + local number
• Services: Landline, Mobile, VoIP, Business

What Area Code is 857? / Where is Area Code 857?

What area code is 857? � The 857 area code is a Massachusetts telephone area code serving the greater Boston area.

Where is area code 857 located? � The 857 area code is located in eastern Massachusetts, USA, including cities such as Boston, Cambridge, Quincy, and Brookline.

Frequently Asked Questions (FAQ)