About this number
There is 1 SPAM rating for this phone number. (573) 535-6400 is a landline based telephone number operated by Level 3 Communications, LLC - and is located in zip code 63043 in the city of Maryland Heights, 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 573, a Network Numbering Exchange (NXX - also known as a prefix) of 535 and a subscriber number of 6400. It has an Operating Company Number (OCN) of 4932. A Common Language Location Identifier (CLLI) of NOCLLIKNOWN. As well as a Local access and transport area (LATA) of 520. It was first assigned for usage on 11/17/2004. Zip code 63043 has a population of 22,367 as of the 2010 census.