About this number
(571) 266 is a landline based telephone number operated by McI Worldcom Communications, I and is located in zip code 22091 in the city of Herndon, Virginia, which is in Fairfax County, and is in the South. It has a Number Planning Area (NPA - also known as an Area Code) of 571 and Network Numbering Exchange (NXX - also known as a prefix) of 266. It has an Operating Company Number (OCN) of 7238. A Common Language Location Identifier (CLLI) of RSTNVABHDS3. As well as a Local access and transport area (LATA) of 236. It was first assigned for usage on 05/29/2008.