State
Area Code 636
St. Charles, Chesterfield, Manchester, Missouri
Local time now
…
Time zone
Central
Main cities
St. Charles, Chesterfield, Manchester, O'Fallon, Fenton, St. Peters
Overlays
None
In service since
1999
When you can make sales calls to 636 numbers
| Every day | 8 AM – 9 PM (federal rule) |
In the called person's local time. Guidance, not legal advice.
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Other area codes in Missouri
Questions about area code 636
- Where is area code 636?
- Area code 636 is in Missouri, covering St. Charles, Chesterfield, Manchester, O'Fallon.
- What time zone is area code 636?
- Central time.
- When can telemarketers call a 636 number?
- Federal rules allow sales calls from 8 AM to 9 PM local time.
- Is 636 a toll-free number?
- No. 636 is a regular area code for Missouri. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.