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Internet Numbering Authority Selects VeriSign For Core DNS Support

VeriSign Managed DNS Service provides 100% uptime guarantee for critical IP address resolution functions

Mountain View, CA, April 25, 2001-VeriSign, Inc. (NASDAQ:VRSN), the leading provider of Internet trust services, today announced that the American Registry for Internet Numbers (ARIN), the organization that administers and registers Internet Protocol (IP) numbers for North America, South America, the Caribbean, and sub-Saharan Africa, has selected VeriSign's Managed DNS Services to ensure the reliability and robust query response of its DNS (Domain Name System) zone file information. VeriSign's Secondary Name Server Hosting, part of the company's suite of Managed DNS Services, will provide secondary name server support to ARIN's zones for inverse address mapping, which perform IP address-to-domain name resolution on the Internet.

The Managed DNS Services suite leverages VeriSign's expertise in managing the .com, .net and .org zones with over 28 million names and 2.5 billion queries per day and the constellation of domain name servers around the globe that support them. The Secondary Name Server Hosting service enables enterprises to outsource the management of their DNS name servers to VeriSign and provides a Service Level Agreement (SLA) guaranteeing 100% availability of the customer's DNS data 24 x 7, 365 days a year. It is the only outsourced solution that allows businesses to host their DNS data on up to eight strategically located name servers in Asia, Europe and the US for improved reliability, availability and performance.

"Inverse address mapping is a critical element of the Internet's functionality, and we wanted a partner who could provide the proper level of attention it deserves," said Raymond Plzak, president and CEO of ARIN. "VeriSign's Managed DNS Services meet our availability goals and will also help us improve overall system performance."

With the Secondary Name Server Hosting service, VeriSign propagates a company's DNS information to a carrier-class network of globally distributed name servers located throughout the Internet. VeriSign's name servers then answer all queries for data in the zone, providing unmatched performance and geographical distribution. Because the servers are located on different sites and networks, customers are protected from single-point-of-failure outages. The service also offers a screening option that identifies configuration errors in a customer's data that may adversely affect operations before the data is transferred to the VeriSign servers.

"In managing IP addresses, ARIN provides core functions for the Internet that require guaranteed performance," said Bruce Chovnick, general manager of VeriSign's Global Registry Services division. "By selecting VeriSign's Secondary Name Server Hosting service, they can rest assured that even emerging DNS issues will be identified and corrected before resulting in any loss of service."

More information about Managed DNS Services is available at the VeriSign Web site (http://www.verisign-grs.com/dns/managed.html).

About VeriSign 
VeriSign, Inc. (Nasdaq:VRSN) is the leading provider of trusted infrastructure services to Web sites, enterprises, electronic commerce service providers and individuals. The Company's domain name, digital certificate and payment services provide the critical web identity, authentication and transaction infrastructure that online businesses require to conduct secure e-commerce and communications. VeriSign's services are available through its Web site (www.verisign.com) or through its direct sales force and reseller partners around the world.

About ARIN 
ARIN is a non-profit organization established for the purpose of administration and registration of Internet Protocol (IP) numbers for North America, South America, the Caribbean and sub-Saharan Africa. One of three Regional Internet Registries (RIRs) worldwide which collectively provide IP registration services to all regions around the globe, ARIN promotes the conservation of IP address space, maintains impartiality while determining the size of address blocks to be allocated or assigned, and supports efforts to keep the global routing tables to a manageable size to ensure routability of information over the Internet.

Statements in this announcement other than historical data and information constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements involve risks and uncertainties that could cause VeriSign's actual results to differ materially from those stated or implied by such forward-looking statements. The potential risks and uncertainties include, among others, VeriSign's limited operating history under its current business structure, uncertainty of future revenue and profitability and potential fluctuations in quarterly operating results, increased competition, risks associated with the company's international business and risks related to potential security breaches. More information about potential factors that could affect the company's business and financial results is included in VeriSign's filings with the Securities and Exchange Commission, especially in the company's Annual Report on Form 10-K for the year ended December 31, 2000. VeriSign undertakes no obligation to update any of the forward-looking statements after the date of this press release.

VeriSign is a registered trademark of VeriSign, Inc. Other names may be trademarks of their respective owners.