Missouri · Area code
Area Code 636St. Charles, MO
Area code 636 is in Missouri, United States, and serves St. Charles, O'Fallon, Chesterfield, Fenton and St. Peters and other places nearby. Its time zone is Central Time.
Area code 636 at a glance
- Area code
- 636
- Main place
- St. Charles, MO
- State
- Missouri
- Country
- 🇺🇸 United States
- Country calling code
- +1
- Time zone
- Central Time (America/Chicago)
- Dial from abroad
- +1 636 XXX XXXX
- Dial inside the US and Canada
- 1 636 XXX XXXX
Cities and places in area code 636
The places phone numbers beginning 636 were issued in, the most common first.
- St. Charles, MO
- O'Fallon, MO
- Chesterfield, MO
- Fenton, MO
- St. Peters, MO
- Wentzville, MO
- Arnold, MO
- Ballwin, MO
- Festus, MO
- Cedar Hill, MO
- De Soto, MO
- Eureka, MO
- High Ridge, MO
- Hillsboro, MO
- Pacific, MO
- Pevely, MO
- Troy, MO
- Union, MO
- Washington, MO
- House Springs, MO
- Lake Saint Louis, MO
- Marthasville, MO
- Saint Clair, MO
- Warrenton, MO
- Wright City, MO
Look up a 636 number
Enter a full number with area code 636: it shows the line type, place, network and time zone, and every way to write it. Free and private.
Area code 636: frequently asked questions
Where is area code 636?
Area code 636 is in Missouri, United States. It serves places including St. Charles, O'Fallon, Chesterfield, Fenton, St. Peters, Wentzville, Arnold and Ballwin.
What time zone is area code 636 in?
Area code 636 is on Central Time. A number with this area code can belong to someone living anywhere, so the time zone tells you where the number was issued rather than where the person is.
Which country is area code 636 in?
Area code 636 belongs to the United States, part of the North American Numbering Plan. Country code +1 is shared by the United States, Canada and many Caribbean and Pacific countries; the area code decides which one a number is in.
How do I call a 636 number from another country?
Dial your country's international access code (or press + on a mobile phone), then 1, then 636, then the seven-digit number: +1 636 followed by the number. Inside the United States and Canada, dial 1 and the ten digits.
Can I tell who is calling from an area code?
No. The area code only shows where a number was first issued. People keep their numbers when they move, mobile numbers work anywhere, and callers can disguise the number they call from. To see what the numbering plan says about a specific number, use the free phone number lookup.
What other area codes are in Missouri?
Other area codes in Missouri include 235, 314, 417, 557, 573, 660, 816 and 975.