About this number
(571) 643 is a landline based telephone number operated by Verizon Virginia, Inc. and is located in zip code 22070 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 643. It has an Operating Company Number (OCN) of 9213. A Common Language Location Identifier (CLLI) of HRNDVADUDS1. As well as a Local access and transport area (LATA) of 236. It was first assigned for usage on 08/28/2001.