About 857:
The 857 Area Code (or Area Code 857) is located in the state of MA. Area Code 857 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 157 thousand unique phone numbers and 242 thousand individuals near the city of Boston
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Boston, MA>Brookline, MA>Cambridge, MA>Chelsea, MA>Everett, MA>Milton, MA>Newton, MA>Quincy, MA>Somerville, MA>Watertown, MA