Area code 857
Area code 857 is a telephone area code in the North American Numbering Plan. It serves Massachusetts, the United States.
- 857area code
- MAMassachusetts
- UScountry
- 2-May-01in service
How to dial a 857 number
From within the United States and Canada, dial 1, then 857, then the seven-digit number. From another country, dial your international access code, then +1 857 and the seven-digit number.
Area code 857 covers the same territory as 617. When several area codes share one area like this, it is called an overlay.
Other area codes in Massachusetts
339, 351, 413, 508, 617, 774, 781, 978
Frequently asked questions
Where is area code 857?
Area code 857 serves Massachusetts, the United States.
What is the country code for a 857 number?
Numbers with North American area codes use the country calling code +1.