Area Code Lookup
What Area Code Is Greenwich?
2 area codes serve Greenwich · Connecticut
Greenwich is served by area codes 203, 475. It is located in Connecticut.
Area Codes Serving Greenwich
Frequently Asked Questions
What area code is Greenwich?
Greenwich is served by area codes 203, 475. It is located in Connecticut.
Why does Greenwich 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). Greenwich now has 2 area codes — 203 and 475 — covering the same or overlapping areas.
How do I call Greenwich from outside the US?
To call Greenwich from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-203-XXX-XXXX). The +1 is the country code for all NANPA countries.