Area Code Lookup
What Area Code Is Onawa?
Area code 712 · Iowa
Onawa uses area code 712. It is located in Iowa.
Area Code Serving Onawa
Frequently Asked Questions
What area code is Onawa?
Onawa uses area code 712. It is located in Iowa.
How do I call Onawa from outside the US?
To call Onawa 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.