About this number
(301) 444 is a landline based telephone number operated by Verizon Maryland, Inc. and is located in zip code 20850 in the city of Rockville, Maryland, which is in Montgomery County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 301 and Network Numbering Exchange (NXX - also known as a prefix) of 444. It has an Operating Company Number (OCN) of 9212. A Common Language Location Identifier (CLLI) of RKVLMDRVDS1. As well as a Local access and transport area (LATA) of 236. Zip code 20850 has a population of 46,340 as of the 2010 census.