About this number
(240) 837 is a landline based telephone number operated by Xo Maryland, LLC and is located in zip code 20008 in the city of Washington, Maryland, which is in District Of Columbia 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 837. It has an Operating Company Number (OCN) of 4773. A Common Language Location Identifier (CLLI) of WASHDCCZDS0. As well as a Local access and transport area (LATA) of 236. It was first assigned for usage on 02/13/2001. Zip code 20008 has a population of 27,525 as of the 2010 census.