About this number
(443) 356 is a landline based telephone number operated by Level 3 Communications, LLC - 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 and Network Numbering Exchange (NXX - also known as a prefix) of 356. It has an Operating Company Number (OCN) of 6119. A Common Language Location Identifier (CLLI) of BLTMMDSN6MD. As well as a Local access and transport area (LATA) of 238. Zip code 21201 has a population of 16,972 as of the 2010 census.