Area Code Lookup
What Area Code Is West Chicago?
2 area codes serve West Chicago · Illinois
West Chicago is served by area codes 331, 630. It is located in Illinois.
Area Codes Serving West Chicago
Frequently Asked Questions
What area code is West Chicago?
West Chicago is served by area codes 331, 630. It is located in Illinois.
Why does West Chicago 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). West Chicago now has 2 area codes — 331 and 630 — covering the same or overlapping areas.
How do I call West Chicago from outside the US?
To call West Chicago from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-331-XXX-XXXX). The +1 is the country code for all NANPA countries.