Area Code 573 was created in 1996 for providing numbering relief to area code 314. The original area code 314 split off to overcome the numbering congestion occurred because of the ever increasing demands for telephone connections. New area code was introduced into the exhausted area for providing telephone services resourcefully.
The code 573 covers almost entire Eastern region of the State of Missouri with the exception of the city St. Louis.
The Missouri State is one of the West North Central States. Other West North Central States are:
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