NeuStar Inc., which provides clearinghouse services to the Internet and communications industries, has acquired San Diego company Webmetrics Inc. for $12.5 million in an all-cash transaction.

Sterling-based NeuStar said in a Tuesday statement that Webmetrics, which monitors and measures Web and network performance, will be added to the NeuStar Ultra Services group.

NeuStar may pay an additional $6 million in cash if Webmetrics meets previously set financial goals, according to a filing with the Securities and Exchange Commission.

The acquisition comes two weeks after NeuStar announced it appointed former SunRocket chief executive Lisa Hook president and chief operating officer.

Hook, who oversaw the second-largest Internet phone startup, which dissolved in July, took her position with NeuStar Jan. 7. She replaced Larry Bouman, who will continue to advise the company.

In its most recent quarter ended Sept. 30, NeuStar (NYSE: NSR) earned $25.7 million, up from $17.1 million in the year-ago quarter. Third-quarter revenue was $28.5 million, a slight drop from $28.6 million in the year-ago quarter.

About Webmetrics
Founded in 1999, Webmetrics is a leading provider of collaborative performance management services for complex web ecosystems. Webmetrics’ website testing and monitoring services are used by companies and SaaS providers that want to ensure online performance, competitive advantage and a positive end-user experience. Webmetrics’ GlobalWatch services test, monitor and measure the performance of websites, transactions, web services and streaming media to ensure 24/7 uptime and performance integrity. The Company’s customers include GMAC, London Business School, Paypal, Careerbuilder, ING, Smithsonian and Harvard Business School Publishing.

About NeuStar Inc. and NeuStar Ultra Services
NeuStar (NYSE: NSR) is a provider of clearinghouse and directory services to the global communications and Internet industry. NeuStar Ultra Services provides solutions to organizations that rely on core Internet services for their critical business processes, applications, and products. Providing integral authoritative DNS services at the root for Top Level Domain (TLD) registries and Second Level Domain (SLD) registrants, NeuStar Ultra Services has thousands of enterprise, service provider, and core infrastructure customers. Visit www.neustar.biz and www.neustarultraservices.biz for more information.