Area Code Lookup
What Area Code Is Dedham?
2 area codes serve Dedham · Massachusetts
Dedham is served by area codes 617, 781. It is located in Massachusetts.
Area Codes Serving Dedham
Frequently Asked Questions
What area code is Dedham?
Dedham is served by area codes 617, 781. It is located in Massachusetts.
Why does Dedham 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). Dedham now has 2 area codes — 617 and 781 — covering the same or overlapping areas.
How do I call Dedham from outside the US?
To call Dedham from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-617-XXX-XXXX). The +1 is the country code for all NANPA countries.