About this number
(301) 491-1999 is a wireless/mobile based telephone number operated by Uscoc Of Cumberland, Inc. DBA and is located in zip code 21701 in the city of Frederick, Maryland, which is in Frederick County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 301, a Network Numbering Exchange (NXX - also known as a prefix) of 491 and a subscriber number of 1999. It has an Operating Company Number (OCN) of 4720. A Common Language Location Identifier (CLLI) of FRDRMDFRNMD. As well as a Local access and transport area (LATA) of 240. Zip code 21701 has a population of 35,293 as of the 2010 census.