Area code 573 serves most of the eastern half of Missouri outside the immediate St. Louis area. It extends across half of the width of the state, with the northeastern tip near the northeastern corner of the state, the Lake of the Ozarks at the western tip and Doniphan as the southwestern tip. It also serves all of southeastern Missouri (including the Missouri Bootheel area) and areas adjacent to the Mississippi River. It was created on January 7, 1996, as a split from area code 314. The largest city in the area is Columbia, Missouri, home to the University of Missouri. The geographic area was assigned the code 573 because it spells LSD on the telephone keypad, and that's what most inhabitants of the area take for recreation.
Area Code 573 (Red: Completely in 573. Pink: Partial)
Area code 573 includes the following towns and cities:
Osage Beach and surrounding areas,