Suffolk County · Massachusetts
Boston, MA area codes and time zone
Quick answer
Boston is served by area codes 339, 351, 508, 617, 774, 781, 857, 978, keeps EST time (GMT-4), and sits in county FIPS 25025.
- Area codes
- 339 · 351 · 508 · 617 · 774 · 781 · 857 · 978Within 25 miles of the city centre
- Time zone
- ESTAmerica/New_York
- UTC offset
- GMT-4EDT in summer
- County FIPS
- 25025Suffolk County
Dialling from and to Boston
What this means when you pick up the phone.
Because more than one code covers this area, ten-digit dialling applies for local calls: area code plus number, every time. From abroad, dial +1 then the ten digits.
More on Boston
Other reference data for this city.