Area Code Lookup
What Area Code Is Sullivan?
2 area codes serve Sullivan
Sullivan is served by area codes 573, 812. It spans Missouri and Indiana.
Area Codes Serving Sullivan
Frequently Asked Questions
What area code is Sullivan?
Sullivan is served by area codes 573, 812.
Why does Sullivan 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). Sullivan now has 2 area codes — 573 and 812 — covering the same or overlapping areas.
How do I call Sullivan from outside the US?
To call Sullivan from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-573-XXX-XXXX). The +1 is the country code for all NANPA countries.