About this number
(540) 579 is a landline based telephone number operated by At&T Local and is located in zip code 22075 in the city of Catoctin, Virginia, which is in Loudoun County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 540 and Network Numbering Exchange (NXX - also known as a prefix) of 579. It has an Operating Company Number (OCN) of 7421. A Common Language Location Identifier (CLLI) of LSBGVA10DMD. As well as a Local access and transport area (LATA) of 246. It was first assigned for usage on 03/26/2003.