Area Code Lookup
What Area Code Is Granite City?
Area code 618 · Illinois
Granite City uses area code 618. It is located in Illinois.
Area Code Serving Granite City
Frequently Asked Questions
What area code is Granite City?
Granite City uses area code 618. It is located in Illinois.
How do I call Granite City from outside the US?
To call Granite City from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-618-XXX-XXXX). The +1 is the country code for all NANPA countries.