DSL.net Cited by National and State Groups; 2nd Straight Year Company Recognized by Deloitte Technology Program.

NEW HAVEN, Conn. -- DSL.net, Inc. (AMEX: BIZ), a leading nationwide provider of broadband communications services to businesses, today announced that it has been independently recognized as the 14th fastest growing technology company in Connecticut as part of a statewide Technology Fast 50 program organized by Deloitte and the Connecticut Technology Council. E[acute accent]The rankings are based on percentage of revenue growth over a five-year period (2000 to 2004). During that time, DSL.net revenue increased by approximately 285%. DSL.net was founded in 1998. The Company received its award at a reception late last year hosted by Deloitte and the Council at Fairfield University. It is the second consecutive year that DSL.net has been ranked among the state's 50 fastest growing technology companies. It is only the second year that the Company has been eligible for the five-year ranking period. DSL.net was named a Deloitte "Rising Star" in both 2002 and 2003. E[acute accent]"We are again honored to be recognized by Deloitte and the Council as one of the state's fastest growing technology companies," said David F. Struwas, president and chief executive officer of DSL.net. "This kind of award, together with being named again last year to the Network World 200 list of top communications and networking companies, is further evidence of the hard work and determination of our employees and the loyalty of our customers." E[acute accent]Alex Discepolo, a director of Deloitte Tax LLP and chairperson of the Connecticut Technology Fast 50, stated that the Fast 50 companies "have shown the strength, vision and creativity to succeed in today's very competitive technology environment. We applaud the successes of DSL.net and acknowledge it as one of the very few" to again be included among the state's Elite Fast 50 list. E[acute accent]For the second consecutive year, DSL.net also was listed among the prestigious Deloitte Technology Fast 500 rankings for 2005 that include companies throughout North America. DSL.net was ranked 439th on the list.

E[acute accent]About Connecticut Technology Council

E[acute accent]The Connecticut Technology Council is the largest and most broad-based business association expressly serving the needs of enterprises involved in areas relating to technology, innovation and the commercialization of the sciences. Representing almost 400 members and a community of some 2,500 companies and several hundred thousand employees, CTC strives to serve its members and the general interests of the State of Connecticut as they relate to the growth and success of technology-based development. For more information, visit www.ct.org.

E[acute accent]About Deloitte

E[acute accent]Deloitte refers to one or more of Deloitte Touche Tohmatsu, a Swiss Verein, its member firms and their respective subsidiaries and affiliates. As a Swiss Verein (association), neither Deloitte Touche Tohmatsu nor any of its member firms has any liability for each other's acts or omissions. Each of the member firms is a separate and independent legal entity operating under the names "Deloitte," "Deloitte & Touche," "Deloitte Touche Tohmatsu," or other related names. Services are provided by the member firms or their subsidiaries or affiliates and not by the Deloitte Touche Tohmatsu Verein. E[acute accent]Deloitte & Touche USA LLP is the U.S. member of Deloitte Touche Tohmatsu. In the U.S., services are provided by the subsidiaries of Deloitte & Touche USA LLP (Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Tax LLP, and their subsidiaries), and not by Deloitte & Touche USA LLP.

E[acute accent]About DSL.net

E[acute accent]DSL.net, Inc. is a leading nationwide provider of broadband communications services to businesses. The Company combines its own facilities, nationwide network infrastructure and Internet Service Provider (ISP) capabilities to provide high-speed Internet access, private network solutions and value-added services directly to small- and medium-sized businesses or larger enterprises looking to connect multiple locations. DSL.net product offerings include T-1, DS-3 and business-class DSL services, virtual private networks (VPNs), frame relay, Web hosting, DNS management, enhanced e-mail, online data backup and recovery services, firewalls and nationwide dial-up services, as well as integrated voice and data offerings in select markets. For more information, visit www.dsl.net, e-mail [e-mail], or call 1-877-DSL-NET1 (1-877-375-6381). E[acute accent]DSL.net's business is subject to various risks and uncertainties. For additional information on DSL.net, see its Annual Report on Form 10-K for the year ended December 31, 2004, which is on file with the Securities and Exchange Commission, including the disclosure contained under "Rick Factors" in such Annual Report. E[acute accent]DSL.net is a trademark of DSL.net, Inc. Other company names may be trademarks of their respective owners.