Area Code Lookup
What Area Code Is Sioux City?
Area code 712 · Iowa
Sioux City uses area code 712. It is located in Iowa.
Area Code Serving Sioux City
Frequently Asked Questions
What area code is Sioux City?
Sioux City uses area code 712. It is located in Iowa.
How do I call Sioux City from outside the US?
To call Sioux City from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-712-XXX-XXXX). The +1 is the country code for all NANPA countries.