Area Code Lookup
What Area Code Is Mount Vernon?
3 area codes serve Mount Vernon
Mount Vernon is served by area codes 360, 564, 812. It spans Washington and Indiana.
Area Codes Serving Mount Vernon
Frequently Asked Questions
What area code is Mount Vernon?
Mount Vernon is served by area codes 360, 564, 812.
Why does Mount Vernon 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). Mount Vernon now has 3 area codes — 360 and 564 and 812 — covering the same or overlapping areas.
How do I call Mount Vernon from outside the US?
To call Mount Vernon from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-360-XXX-XXXX). The +1 is the country code for all NANPA countries.