636 area code
Area code 636 is in Missouri, United States, in the Central time zone. It covers Ballwin, Chesterfield, O'Fallon, Saint Charles, Saint Peters, Wildwood and more.
State / Province
Missouri (MO)
Country
United States
Region
Midwest
Time zone
Central
Current local time
—
Approx. location
38.706, -90.599 ↗
How to dial a 636 number
- National format
- (636) 555-0100
- International (E.164)
- +1 636 555 0100
- From abroad
- +1 636 …
Cities & areas in the 636 area code
6 known locations — a selection:
Ballwin
Chesterfield
O'Fallon
Saint Charles
Saint Peters
Wildwood
About area code 636
Area code 636 is one of the North American Numbering Plan (NANP) codes serving Missouri. In the NANP a full number looks like +1 (636) NXX-XXXX: the +1 is the country code for the US and Canada, 636 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.