About this number
(301) 378 is a landline based telephone number operated by Comcast Phone Of Northern Mary and is located in the city of Frederick, Maryland 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 378. It has an Operating Company Number (OCN) of 107D. A Common Language Location Identifier (CLLI) of FRDRMDFRX1X. As well as a Local access and transport area (LATA) of 240. It was first assigned for usage on 02/20/2007.