Where Is Area Code 636?
Area code 636 serves eastern Missouri, especially communities west of St. Louis in the St. Louis metropolitan area. St. Charles is the primary city associated with the code. The service area is in the Great Plains region and uses Central Time.
The code includes communities in St. Charles, St. Louis, Franklin, Jefferson, Warren, and Lincoln counties. Major communities include O'Fallon, Wentzville, St. Peters, Lake Saint Louis, Chesterfield, Ballwin, Wildwood, Washington, Warrenton, Arnold, Festus, and Union.
The Missouri River is a major geographic feature in the St. Charles portion of the area. Historic downtown St. Charles lies along the river, and Katy Trail State Park passes through St. Charles County.
Cities and Communities in the 636 Area Code
- Arnold, Jefferson County
- Augusta, St. Charles County
- Ballwin, St. Louis County
- Chesterfield, St. Louis County
- Cottleville, St. Charles County
- Crystal City, Jefferson County
- Dardenne Prairie, St. Charles County
- De Soto, Jefferson County
- Ellisville, St. Louis County
- Eureka, St. Louis County
- Festus, Jefferson County
- Fenton, St. Louis County
- Flint Hill, St. Charles County
- Foristell, St. Charles and Warren counties
- Hawk Point, Warren County
- Herculaneum, Jefferson County
- Hillsboro, Jefferson County
- Jonesburg, Warren County
- Lake Saint Louis, St. Charles County
- Manchester, St. Louis County
- Marthasville, Warren County
- Moscow Mills, Lincoln County
- New Melle, St. Charles County
- O'Fallon, St. Charles County
- Pacific, Franklin and St. Louis counties
- Pevely, Jefferson County
- St. Charles, St. Charles County
- St. Clair, Franklin County
- St. Peters, St. Charles County
- Truesdale, Warren County
- Troy, Lincoln County
- Union, Franklin County
- Valley Park, St. Louis County
- Warrenton, Warren County
- Washington, Franklin County
- Weldon Spring, St. Charles County
- Wildwood, St. Louis County
- Winfield, Lincoln County
- Wright City, Warren County
History of Area Code 636
Area code 636 was established in 1999 as a geographic split from area code 314. The change gave St. Charles and other western and southwestern communities around St. Louis their own numbering area, while 314 remained focused mainly on St. Louis city and nearby inner suburbs.
Area code 636 is not an overlay, and no later split has been assigned to it. The 1999 split responded to growing demand for telephone numbers in the expanding St. Louis metropolitan area.
Key Facts About Area Code 636
- Area code 636 is a geographic area code in Missouri.
- St. Charles is the primary city associated with area code 636.
- Area code 636 includes communities in St. Charles, St. Louis, Franklin, Jefferson, Warren, and Lincoln counties.
- Area code 636 was created in 1999 by splitting area code 314.
- Area code 636 is in the Central Time Zone.
- Area code 636 is part of the Great Plains region of the United States.
- The Missouri River is a major geographic feature in the St. Charles portion of area code 636.
- Katy Trail State Park passes through St. Charles County.
Frequently Asked Questions
What state is area code 636 in?
Area code 636 is in Missouri.
What major cities use area code 636?
Major cities using area code 636 include St. Charles, O'Fallon, Wentzville, St. Peters, Chesterfield, Ballwin, Wildwood, Washington, Warrenton, Arnold, and Festus.
What time zone is area code 636 in?
Area code 636 is in the Central Time Zone.
Is area code 636 a toll-free number?
No. Area code 636 is a geographic area code, not a toll-free code.