About this number
(240) 556 is a landline based telephone number operated by Paetec Communications, Inc. - and is located in zip code 20815 in the city of Chevy Chase, 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 240 and Network Numbering Exchange (NXX - also known as a prefix) of 556. It has an Operating Company Number (OCN) of 4716. A Common Language Location Identifier (CLLI) of CHCHMDBE6MD. As well as a Local access and transport area (LATA) of 236. Zip code 20815 has a population of 29,082 as of the 2010 census.