Post 200 The guide to the region's top businesses

Private companies     U.S. headquarters     Nonprofits     Major employers     Universities     Hospitals     Sports     Public companies and financial services     Law and Lobby     Banks and credit unions    

Public companies and financial services


Neustar orchestrates many behind-the-scenes operations that keep phone lines and Internet connections humming. For example, the company maintains the databases that allow calls to connect between different phone carriers. It also helps companies monitor and manage their Web sites’ traffic, security risks and IP geolocation, among other services. In October, the company paid $650 million for Vienna-based TARGUSinfo, which provides real-time caller identification services for telecommunications companies.


In 2003, Neustar helped make it possible for people in much of North America to keep their cell phone numbers when they switched carriers.

21575 Ridgetop Circle

Sterling Va., 20166


Founded: 1996

President and CEO: Lisa A. Hook

Revenue: $526810

Assets: $733870

Employees (local): 1416 (697)

NOTE: Our methodology for the rankings.