Area Code Lookup
What Area Code Is Jefferson?
Area code 920 · Wisconsin
Jefferson uses area code 920. It is located in Wisconsin.
Area Code Serving Jefferson
Frequently Asked Questions
What area code is Jefferson?
Jefferson uses area code 920. It is located in Wisconsin.
How do I call Jefferson from outside the US?
To call Jefferson from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-920-XXX-XXXX). The +1 is the country code for all NANPA countries.