Realtime Worlds Solidifies Commitment to Gamers by Choosing Internap

Internap Provides the Engine that Powers Realtime Worlds as It Promises Gamers The Ultimate Online Experience^™

ATLANTA, May 29, 2009 — Internap Network Services Corporation (NASDAQ: INAP), a global provider of end-to-end Internet business solutions, today announced the signing of Realtime Worlds, a leading independent video game developer and publisher, to a three-year agreement for services supporting the launch of its first online game: APB (All Points Bulletin). Realtime Worlds will be using a combination of Internap’s Performance IP^™, Content Delivery Network (CDN), premise-based route-optimization technology and international data centers to support its rapidly growing business — one increasingly focused on the online gaming sector.

“Ramping up thousands of concurrent online users worldwide is no simple task,” said Realtime Worlds Vice President of Online Operations Rob Rice. “Doing so requires connectivity services proven to be reliable and robust. Internap stood out from the crowd because it offers a unique solution of intelligent, route-optimized IP and CDN distribution, combined with expertly managed data center facilities in locations ideal for mission-critical distribution to our global audiences.”

The Realtime Worlds team has a history of creating some of the world’s best-selling video games, including the global hit franchises Crackdown, Lemmings and Grand Theft Auto. The company’s latest release and first online game, APB, is a city-based community game where players choose between playing criminals or enforcers in pursuit of thwarting their crimes. “As avid game players, we believe the future lies in online gaming. Persistent worlds with hundreds of thousands of players will offer an unrivalled experience that action gamers have yet to enjoy. We have an innovative concept and unique technology that will deliver new possibilities to the online game market,” said Rice. “Our relationship with Internap solidifies our commitment to becoming a world-class online game publisher.”

“Internap has proven once again it has a strong solution for companies requiring their content to traverse the public Internet with split-second speed,” said Randal Thompson, Vice President of Global Sales at Internap. “Online game publishers know they cannot risk players experiencing latency, jitter or lag during online game play. Our Managed Internet Route Optimizer, patented architecture used in both our IP and CDN services, provides our customers with 100 percent uptime guarantees. Online game publishers understand how important it is to provide users with The Ultimate Online Experience. They recognize Internap as the company with the unique service package able to deliver on that promise.”

About Internap’s patented Managed Internet Route Optimizer^™ (MIRO)

Internap’s MIRO technology monitors the performance of every major Internet backbone, intelligently routing traffic across the best path to provide faster and more reliable content and data delivery than traditional routing methods. The Internap route-control technology considers path characteristics like latency, packet loss, route stability and congestion when making routing decisions. This technology continually analyzes the traffic situation on each Internet backbone. Decisions are made dynamically and automatically to account for network performance changes, without the need for manual intervention. Advanced analytics are used to probe and benchmark all known points on the Internet through each bandwidth carrier and continuously adjust the routes that the content uses to reach the end-user.

About Realtime Worlds

Founded in 2002 by Creative Director David Jones alongside gaming industry veterans Ian Hetherington and Tony Harman, Realtime Worlds is one of the largest and most successful independent game developers in the world. With an exceptionally talented staff of more than 230, the company’s experienced teams have a tremendous history of creating some of the world’s bestselling video games, including the global hit franchises “Lemmings” and “Grand Theft Auto.” Realtime Worlds’ first game, Crackdown, launched exclusively on Xbox 360 in early 2007, and won multiple awards including BAFTA and Develop Industry Excellence awards on the way to sales of 1.5 million copies. For more information on Realtime Worlds, visit www.realtimeworlds.com.

About Internap

Internap is a leading Internet solutions company that provides The Ultimate Online Experience^™ by managing, delivering and distributing applications and content with 100 percent performance and reliability. With a global platform of data centers, managed Internet services and a content delivery network (CDN), Internap frees its customers to innovate, improve service levels, and lower the cost of IT operations. More than 3,000 companies across the globe trust Internap to help them achieve their Internet business goals. For more information, visit internap.josh.ux.voxel.net.

Internap “Safe Harbor” Statement

Certain information included in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, including, among others, statements regarding the performance of our products, business strategy, projected levels of growth and projected costs, are forward-looking statements. Those statements include state ments regarding the intent, belief or current expectations of Internap and members of our management team, as well as the assumptions on which such statements are based. Forward-looking statements are not guarantees of future performance and involve risks and uncertainties that actual results may differ materially from those contemplated by forward-looking statements. Other important factors that may affect Internaps business, produ cts, results of operations and financial condition include, but are not limited to: our ability to sustain pr ofitability; our ability to respond successfully to technological change; the availability of services from I nternet network service providers or network service providers providing network access loops and local loops on favorable terms, or at all; failure of third party suppliers to deliver their products and services on fa vorable terms, or at all; failures in our network operations centers, network access points or computer syste ms; and our ability to protect our intellectual property.

Our Annual Report on Form 10-K/A, Quarterly Reports on Form 10-Q, recent Current Reports on Form 8-K and o ther Securities and Exchange Commission filings discuss the foregoing risks, as well as other important risk factors that could contribute to such differences or otherwise affect our business, results of operations and financial condition. We undertake no obligation to revise or update any forward-looking statement for any reason.

Internap Press contact

Lisa Black
(781) 405-8289
internap@calysto.com

Investor contact

Andrew McBath
(404) 865-7198
amcbath@internap.com

Realtime World contact

Jason Wonacott/Racheal Caswell
310-477-2871 Ext. 668/662
jwonacott@wonacottpr.com
rcaswell@wonacottpr.com