Area Codes
| 573 | Missouri (Columbia, Jefferson City, Hannibal, Cape Girardeau, Poplar Bluff, Farmington, Park Hills, Lake Ozark and eastern Missouri excluding St. Louis) | More information at: Area Code 573 Phone Number Blocks
| 573 | Missouri (Columbia, Jefferson City, Hannibal, Cape Girardeau, Poplar Bluff, Farmington, Park Hills, Lake Ozark and eastern Missouri excluding St. Louis) | More information at: Area Code 573 Phone Number Blocks