Area Code Lookup
What Area Code Is Mason City?
2 area codes serve Mason City
Mason City is served by area codes 217, 641. It spans Illinois and Iowa.
Area Codes Serving Mason City
Frequently Asked Questions
What area code is Mason City?
Mason City is served by area codes 217, 641.
Why does Mason City 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). Mason City now has 2 area codes — 217 and 641 — covering the same or overlapping areas.
How do I call Mason City from outside the US?
To call Mason City from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-217-XXX-XXXX). The +1 is the country code for all NANPA countries.