Area code 636
636 is O'Fallon, St. Charles, Chesterfield, Missouri.
Area code 636 at a glance
- State
- Missouri
- Main cities
- O'Fallon, St. Charles, Chesterfield, Wentzville, Ballwin, Wildwood, Lake St. Louis
- Time zone
- Central Time
- Local time now
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- Overlay codes
- No overlay — 636 is the only area code here.
- In service since
- 1999
Get a 636 number
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- +1 636 829 2042
- +1 636 551 5124
- +1 636 330 2199
- +1 636 551 5132
- +1 636 551 5182
Call a 636 number from abroad
Call any 636 number from your browser — no SIM, no app install, and no international roaming charge.
Calls to United States start at $0.02/min from QuikRing.
Call now in your browserCalling 636 from inside the US or Canada
Dial 1, then 636, then the 7-digit number.
Calling a 636 number or a 1-800 number from outside the US or Canada? Here is how to reach it from abroad.
Frequently asked questions
Where is area code 636?
Area code 636 covers O'Fallon, St. Charles, Chesterfield in Missouri.
What time is it in area code 636?
Area code 636 is in the Central Time time zone. See the live clock above for the current local time.
How do I get an area code 636 phone number?
Sign up for QuikRing and rent one of the available 636 numbers shown above. It starts working immediately and can receive real calls and text messages.
How much does it cost to call 636 from abroad?
Calls to United States numbers, including area code 636, start at $0.02/min with QuikRing — no roaming plan or SIM needed.