About this number
(443) 789 is a wireless/mobile based telephone number operated by New Cingular Wireless Pcs, LLC and is located in zip code 21045 in the city of Columbia, Maryland, which is in Howard County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 443 and Network Numbering Exchange (NXX - also known as a prefix) of 789. It has an Operating Company Number (OCN) of 4036. A Common Language Location Identifier (CLLI) of CLMAMDORGT0. As well as a Local access and transport area (LATA) of 238. Zip code 21045 has a population of 38,288 as of the 2010 census.