Location: Massachusetts, Chelmsford, Middlesex County
Approximate number of phones: 1831
Carrier: Metro Pcs, Inc.
Mr. Number records show that there are at least 5,531 active phone numbers with the prefix 857312 out of a possible 10,000. Numbers in this exchange are mainly mobile phones. Phone numbers beginning with 857-312 are allocated to Massachusetts, in particular Boston in Suffolk County. Public records tell us that 48.15% (2,663) of subscribers are men and 51.85% (2,867) are women. Median household income in this part of the country is $51,638 and 35.26% of housing units are owner-occupied.