About this number
(573) 643 is a landline based telephone number operated by Southwestern Bell and is located in zip code 63866 in the city of Marston, Missouri, which is in New Madrid County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 573 and Network Numbering Exchange (NXX - also known as a prefix) of 643. It has an Operating Company Number (OCN) of 9533. A Common Language Location Identifier (CLLI) of MRTNMONIRS2. As well as a Local access and transport area (LATA) of 520. Zip code 63866 has a population of 488 as of the 2010 census.