Area Code Lookup
What Area Code Is Northbrook?
2 area codes serve Northbrook · Illinois
Northbrook is served by area codes 224, 847. It is located in Illinois.
Area Codes Serving Northbrook
Frequently Asked Questions
What area code is Northbrook?
Northbrook is served by area codes 224, 847. It is located in Illinois.
Why does Northbrook 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). Northbrook now has 2 area codes — 224 and 847 — covering the same or overlapping areas.
How do I call Northbrook from outside the US?
To call Northbrook from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-224-XXX-XXXX). The +1 is the country code for all NANPA countries.