Area Code Lookup
What Area Code Is Boston?
3 area codes serve Boston · Massachusetts
Boston is served by area codes 508, 617, 857. It is located in Massachusetts.
Area Codes Serving Boston
Frequently Asked Questions
What area code is Boston?
Boston is served by area codes 508, 617, 857. It is located in Massachusetts.
Why does Boston have multiple area codes?
As demand for phone numbers increased, NANPA added area codes through splits (dividing the region) or overlays (layering a new code over the same geography). Boston now has 3 area codes — 508 and 617 and 857 — covering the same or overlapping areas.
How do I call Boston from outside the US?
To call Boston from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-508-XXX-XXXX). The +1 is the country code for all NANPA countries.