About this number
(443) 424-0057 is a landline based telephone number operated by Armstrong Telecommunications, and is located in zip code 21201 in the city of Baltimore, Maryland, which is in Baltimore County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 443, a Network Numbering Exchange (NXX - also known as a prefix) of 424 and a subscriber number of 0057. It has an Operating Company Number (OCN) of 420C. A Common Language Location Identifier (CLLI) of NOCLLIKNOWN. As well as a Local access and transport area (LATA) of 238. It was first assigned for usage on 08/11/2008. Zip code 21201 has a population of 16,972 as of the 2010 census.