About this number
(636) 390 is a landline based telephone number operated by Southwestern Bell and is located in zip code 63090 in the city of Washington, Missouri, which is in Franklin 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 390. It has an Operating Company Number (OCN) of 9533. A Common Language Location Identifier (CLLI) of WASHMOBERS0. As well as a Local access and transport area (LATA) of 520. Zip code 63090 has a population of 21,524 as of the 2010 census.