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Missouri area code314 map

The 314 area code is the core area code associated with the Greater St. Louis metropolitan area, serving the core city and its inner-ring, closest, Missouri- based suburbs. 314 is surrounded by area code 636, which serves St. Louis' outer-ring, western suburbs, also entirely within the state of Missouri.

The term '314' is sometimes used as symbolism for Greater St. Louis as a whole.



Area code 314 was one of the original area codes created in October 1947. It originally covered most of the eastern half of Missouri, from the Illinois border to Jefferson City. It stretched along nearly the entire width of the state along the Mississippi River. It was split on January 7, 1996, when most of the western and southern portion was assigned to area code 573, leaving 314 to cover most of the Missouri side of the St. Louis metropolitan area.

The creation of 573 was intended to be a long-term solution. Within only two years, however, 314 was close to exhaustion once again due to the proliferation of cell phones, fax machines and pagers in the St. Louis core. The supply of numbers was further limited because the St. Louis LATA extends across much of the southern portion of Illinois, meaning several numbers that were part of Illinois' 618 weren't available for use. As a result, 314 was reduced to its current size on May 22, 1999, when area code 636 was assigned to St. Louis' outer western suburbs. Before the introduction of number portability, 314 was used for all cell phones on the Missouri side of the St. Louis area.

In 2000, the Missouri Public Service Commission announced plans to add area code 557 as an overlay to area code 314, but postponed the implementation date (May 5, 2002) indefinitely, when the commission determined no immediate need for more phone numbers; conservation measures such as number pooling was to blame.[1]

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Missouri area codes: 314, 417, 573, 636, 660, 816
North: 636
West: 636 area code 314 East: 618
South: 573
Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872

Coordinates: 38°37′N 90°13′W / 38.62°N 90.22°W / 38.62; -90.22