Area Code Lookup
What Area Code Is St Charles?
Area code 636 · Missouri
St Charles uses area code 636. It is located in Missouri.
Area Code Serving St Charles
Frequently Asked Questions
What area code is St Charles?
St Charles uses area code 636. It is located in Missouri.
How do I call St Charles from outside the US?
To call St Charles from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-636-XXX-XXXX). The +1 is the country code for all NANPA countries.