About this number
(443) 436 is a landline based telephone number operated by Verizon Maryland, Inc. and is located in zip code 21207 in the city of Gwynn Oak, 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 436. It has an Operating Company Number (OCN) of 9212. A Common Language Location Identifier (CLLI) of WDLWMDWLDS0. As well as a Local access and transport area (LATA) of 238. Zip code 21207 has a population of 48,133 as of the 2010 census.