About Area Code 636
Area code 636 serves Missouri, covering major cities including O'Fallon. Operating in the Central Time (CT), this code was established in 1999.
| State | Time Zone | Cities |
|---|---|---|
| Missouri | Central Time (CT) | O'Fallon |
Active Area Code
636
Missouri
Central Time (CT)
Est. 1999
PRIMARY
Location
Missouri
O'Fallon
ACTIVE
Coverage
1 Cities
Since 1999
Beware of Spam Calls
Scammers frequently use 636 numbers. Always verify unknown callers before sharing personal information.
Protect Yourself NowCommon Questions
Where is 636?
Located in Missouri, serving O'Fallon and surrounding areas.
What time zone?
Operates in Central Time (CT).
When established?
Area code 636 was introduced in 1999.
Used for spam?
Can be used by legitimate and fraudulent callers. Always verify unknown numbers.