Area Code Lookup
What Area Code Is Dorchester?
4 area codes serve Dorchester
Dorchester is served by area codes 382, 534, 617, 857. It spans Ontario and Wisconsin and Massachusetts.
Area Codes Serving Dorchester
Frequently Asked Questions
What area code is Dorchester?
Dorchester is served by area codes 382, 534, 617, 857.
Why does Dorchester 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). Dorchester now has 4 area codes — 382 and 534 and 617 and 857 — covering the same or overlapping areas.
How do I call Dorchester from outside the US?
To call Dorchester from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-382-XXX-XXXX). The +1 is the country code for all NANPA countries.