About this number
(636) 203 is a landline based telephone number operated by McI Worldcom Communications, I and is located in zip code 63146 in the city of Saint Louis, Missouri, which is in St. Louis 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 203. It has an Operating Company Number (OCN) of 7432. A Common Language Location Identifier (CLLI) of STLTMOBODS1. As well as a Local access and transport area (LATA) of 520. Zip code 63146 has a population of 29,262 as of the 2010 census.