636 area code
Area code 636 is in Missouri, including St. Charles, O'Fallon, Fenton and Chesterfield. It's on Central Time.
Central Time
--:--
() ·
Is it a good time to call 636?
Checking…
Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 636
| City | Time zone |
|---|---|
| St. Charles, MO | Central Time |
| O'Fallon, MO | Central Time |
| Fenton, MO | Central Time |
| Chesterfield, MO | Central Time |
| St. Peters, MO | Central Time |
| Wentzville, MO | Central Time |
| Ballwin, MO | Central Time |
| Arnold, MO | Central Time |
| Festus, MO | Central Time |
| Washington, MO | Central Time |
| Pacific, MO | Central Time |
| Cedar Hill, MO | Central Time |
Other area codes in Missouri
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 636?
Area code 636 is in Missouri, including St. Charles, O'Fallon, Fenton and Chesterfield.
What time zone is area code 636?
636 is on Central Time (UTC−6, UTC−5 in summer).
What time is it in area code 636 right now?
The live clock at the top of this page shows the current local time in area code 636.