Area Code Lookup
What Area Code Is Grayslake?
Area code 847 · Illinois
Grayslake uses area code 847. It is located in Illinois.
Area Code Serving Grayslake
Frequently Asked Questions
What area code is Grayslake?
Grayslake uses area code 847. It is located in Illinois.
How do I call Grayslake from outside the US?
To call Grayslake from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-847-XXX-XXXX). The +1 is the country code for all NANPA countries.