Area Code Lookup
What Area Code Is Collinsville?
3 area codes serve Collinsville
Collinsville is served by area codes 276, 618, 903. It spans Virginia and Illinois and Texas.
Area Codes Serving Collinsville
Frequently Asked Questions
What area code is Collinsville?
Collinsville is served by area codes 276, 618, 903.
Why does Collinsville 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). Collinsville now has 3 area codes — 276 and 618 and 903 — covering the same or overlapping areas.
How do I call Collinsville from outside the US?
To call Collinsville from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-276-XXX-XXXX). The +1 is the country code for all NANPA countries.