ABEBOOKS.COM SELECTS ULTRADNS TO ENHANCE DNS RESOLUTION

UltraDNS delivers secure, reliable managed DNS services for Abebooks.com business critical web operations

BRISBANE, Calif., April 29, 2005 -- UltraDNS™ Corporation, the leading Managed DNS Service Provider, today announced that Abebooks.com, the largest online marketplace for books with over 70 million titles available, has implemented the UltraDNS Managed DNS Service to enhance its business-critical web operations and support its continued growth. As the 60th largest online retailer, according to Internet Retailers' Top 300 Guide to Online Retailers, Abebooks.com recognizes that Managed DNS Service ensures effective and efficient network operations.

"Because our entire business rests on book buyers and sellers being able to interact via our online marketplace, it was critical to ensure accurate and efficient DNS resolution," said Jayson Minard, CIO, at Abebooks. "Since migrating to UltraDNS, our Keynote® monitoring has reported dramatic increases in network performance on all Abebook.com properties. With higher availability and a geographically distributed presence, we are able to present a local feel to our global customers. We are extremely pleased with the results that UltraDNS has helped us to achieve."

The migration to the UltraDNS solution enables Abebooks.com to rely on the world's most robust Domain Name System (DNS) infrastructure to initiate online transactions. Guaranteed by the UltraDNS 100% Service Level Agreement (SLA), Abebooks.com is able to deliver superior levels of service and security to book buyers from over 200 countries and over 13,000 sellers who want a simple and safe way to buy and sell new, used, rare, and out-of-print books online. The UltraDNS global, carrier-class network increases the performance of Abebooks.com online properties and provides an enhanced user experience by delivering fast and efficient resolution.

UltraDNS provides Abebooks.com and more than 8,000 other customers with the industry's only fault-tolerant, global directory service. Utilizing advanced routing technology, the network ensures that every connection is handled by the closest server in the UltraDNS global network. Managed DNS Service allows companies to hierarchically manage DNS information through a Graphical User Interface.

"The successful operation of all online marketplaces requires secure and reliable DNS resolution," said Ben Petro, president and CEO of UltraDNS. "As Abebooks.com and other leading on-line retailers continue to rely on UltraDNS to address their advanced infrastructure requirements, they are able to provide customers with the most dependable ecommerce experience on the Internet."

About UltraDNS
UltraDNS Corporation is the world's leading Managed DNS Service Provider, delivering superior security, reliability and performance to organizations that rely on DNS for their critical business processes, applications and services. With the growth in e-commerce and the emergence of advanced DNS-based communication and supply chain management services, organizations can no longer rely on traditional approaches to DNS. On October 20th, 2005 UltraDNS launched the DNS Shield™ in partnership with major Internet Service Providers (ISPs) including AOL, Earthlink, Time Warner and Yahoo to provide the highest level of reliability and security to over 100 million Internet users.

UltraDNS provides a range of global and local DNS solutions - both managed services and custom infrastructure - built on its unique Directory Services Platform and proprietary, patented technologies. Through its thousands of enterprise, service provider and TLD infrastructure customers, UltraDNS powers the resolution of over 15 million domains around the globe. UltraDNS has offices in California, Virginia, Arizona, Chicago and the UK. For more information please visit www.ultradns.com.

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