Area Code 636: Location, Cities, and Usage - area-code -

Frequently Asked Questions

Ballwin, Missouri, is in area code 636. This area code covers a significant portion of the western suburbs of St. Louis, including Ballwin, which is known for its high quality of life and active real estate market.
To call a 636 number from a different area code, dial 1 followed by the 10-digit number (1-636-XXX-XXXX). This applies whether you're calling from within Missouri or another state.
Area code 636 primarily covers St. Charles County, Franklin County, and Jefferson County in Missouri. Key cities and towns within 636 include Ballwin, Chesterfield, O'Fallon, St. Charles, St. Peters, Washington, Wentzville, and Lake St. Louis.
Area code 636 was created in 1999 as a split from area code 314 due to the rapid growth of the St. Louis metropolitan area. This split was necessary to accommodate the increasing demand for telephone numbers and ensure efficient service.
Area code 636 was introduced to alleviate the strain on the existing numbering resources within area code 314, which was originally assigned to the entire St. Louis region. The growth of the area necessitated a new area code to handle the increasing demand for phone numbers.
Area code 636 primarily covers St. Charles County, Franklin County, and Jefferson County in Missouri. It also includes smaller sections of St. Louis County, Montgomery County, and Lincoln County.
For local calls within area code 636, simply dial the 7-digit phone number (XXX-XXXX). Currently, 636 is the only area code in Missouri that hasn't transitioned to mandatory 10-digit dialing for local calls.
Telecommunications services in area code 636 are regulated by both the Missouri Public Service Commission (PSC) and the Federal Communications Commission (FCC). These agencies ensure fair practices, number allocation, and consumer protection.
Area code 636 offers a wide range of telecommunication services, including landline and mobile phone service, internet access (broadband and fiber optic), and specialized business solutions. Major carriers like AT&T, Verizon, and T-Mobile serve the area.
Ballwin consistently ranks highly in quality of life surveys and has been recognized nationally as a desirable place to live. It offers excellent schools, low crime rates, and a strong sense of community. Additionally, Ballwin has a unique tax advantage: the city itself doesn't levy a real estate tax.
Area code 636 is located in east-central Missouri, primarily encompassing St. Charles County, Franklin County, and Jefferson County. It forms a ring around the city of St. Louis, covering much of its western suburbs.
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