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The numbering plan area is bordered to the west by area code 636, which serves St. Louis' outer suburbs to the west, south, and north. Across the Mississippi River to the east, 314 is adjacent to area code 618, which serves southern Illinois and most of Metro East. Area code 557 was added to the 314 numbering plan area on August 12, 2022, to ...
Area code. Location. 314/557. St. Louis and many of its immediate suburbs. 417. The southwestern quarter of Missouri, including Springfield, Joplin and Branson. 573. Eastern and Southeastern Missouri excluding the St. Louis area but including Columbia, Jefferson City, Rolla, Cape Girardeau, Perryville and Hannibal. 636.
Area code (s) 217, 314, 447, 557, 573, 618, 636, 730. Greater St. Louis is the 21st-largest metropolitan statistical area (MSA) in the United States, [ 3][ 4] the largest in Missouri, and the second-largest in Illinois. Its core city — St. Louis, Missouri —sits in the geographic center of the metro area, on the west bank of the Mississippi ...
Area code 636. Area code 636 is a telephone area code in North American Numbering Plan (NANP) for the east-central part of the U.S. state of Missouri, comprising mainly the western suburbs of St. Louis. It includes parts of Chesterfield and Fenton in St. Louis County, and all of St. Charles, Jefferson, and Warren counties, all of Franklin ...
Main article: History of St. Louis before 1762. The area that became St. Louis was a center of the Native American Mississippian culture, which built numerous temple and residential earthwork mounds on both sides of the Mississippi River. Their major regional center was at Cahokia Mounds, active from 900 to 1500.
The average population of Missouri's counties is 53,880; St. Louis County is the most populous (987,059), and Worth County is the least (1,907). The average land area is 599 sq mi (1,550 km 2). The largest county is Texas County (1,179 sq mi, 3,054 km 2) and the smallest is St. Louis city (61.9 sq mi, 160 km 2). [5] [6]
In 1954, most of Metro East of St. Louis switched from area code 217 to 618. Projections in 2021 by the North American Numbering Plan Administrator, indicated central office code exhaustion by 2025. [3] Periodic proposals were made for code relief, and area code 730 was designated for an overlay complex. Implementation was completed with an in ...
312: Chicago, the central city area including the Chicago Loop and the Near North Side. 618/730: Southern Illinois, including Carbondale and most of the Metro East region of St. Louis suburbs in Illinois. 630/331: West suburbs of Chicago in DuPage County and Kane County including Wheaton, Naperville, and Aurora.