Area Code 314
(314 and 557)
Area Code 314 History:
Area code 314 was officially put into service. Area code 314 has been split 2 times. In 1950 area code 314 was split to form a portion of area code 417. In 1996 area code 314 was split to form area code 573. In 1999 area code 314 was split to form area code 636.
Area code 557 was put into service as an all services overlay of area code 314 on August 12, 2022. Ten digit dialing (area code + seven digit number) is necessary in the 314/557 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
Counties in Missouri within area code 314 include:
Saint Louis County.
Major cities or places in Missouri within area code 314 include:
Area code 314 serves St. Louis and the larger suburb communities of Ferguson, Florissant, Hazelwood, Kirkwood, Maryland Heights, Mehville, Oakville, Overland, Spanish Lake, St. Louis, University City and Webster Grove, as well as, many smaller communities near St. Louis.