About this number
(636) 337 is a landline based telephone number operated by Southwestern Bell and is located in zip code 63020 in the city of De Soto, Missouri, which is in Jefferson County, and is in the Midwest. It has a Number Planning Area (NPA - also known as an Area Code) of 636 and Network Numbering Exchange (NXX - also known as a prefix) of 337. It has an Operating Company Number (OCN) of 9533. A Common Language Location Identifier (CLLI) of DESTMOGIRS0. As well as a Local access and transport area (LATA) of 520. Zip code 63020 has a population of 20,714 as of the 2010 census.