Area Code Lookup
What Area Code Is Old Greenwich?
Area code 475 · Connecticut
Old Greenwich uses area code 475. It is located in Connecticut.
Area Code Serving Old Greenwich
Frequently Asked Questions
What area code is Old Greenwich?
Old Greenwich uses area code 475. It is located in Connecticut.
How do I call Old Greenwich from outside the US?
To call Old Greenwich from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-475-XXX-XXXX). The +1 is the country code for all NANPA countries.