DSL.net Names Senior VP for Sales and Marketing; Diane Gongaware Joins Company's Senior Management Team.

NEW HAVEN, Conn. -- DSL.net, Inc. (NASDAQ: DSLN), a leading nationwide provider of broadband communications services to businesses, said today that it has named Diane B. Gongaware to the position of senior vice president of sales and marketing.

Ms. Gongaware, an experienced high-tech and telecommunications sales and marketing leader, formally begins her duties on Monday, June 28, 2004. She comes to DSL.net from Momentum Technology Partners, where she was a principal for the consulting firm, which specializes in interim executive management services for VC/private equity firms, portfolio companies and corporate ventures. Her clients in the communications industry have included software companies in the Internet and VoIP (voice over Internet protocol) sector.

"We are delighted to add Diane to the DSL.net team in this key role," said Keith Markley, president and chief operating officer of DSL.net. "Diane brings over 20 years of sales, marketing and management experience in the telecommunications arena with a successful track record of leading teams, increasing sales, developing new products and sales channels, and helping position companies for sustained growth."

A former senior vice president of sales and the Northeast region president for 2nd Century Communications, Ms. Gongaware also served as vice president of corporate development, marketing and strategy at Velocita Corporation and is a former vice president of the enterprise accounts group at Verizon Corporation (then Bell Atlantic Corporation). In addition, her background includes vice president and general manager for the Penn Access Corporation (now AT&T/Pittsburgh) and various senior positions at U.S. Sprint Corporation.

Ms. Gongaware succeeds Ray Allieri, who left DSL.net to become president of Waltham, Mass.-based CTC Communications Corporation.

About DSL.net

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).

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements are subject to a variety of risks and uncertainties, many of which are beyond DSL.net's control, which could cause actual results to differ materially from those contemplated in these forward-looking statements. In particular, the risks and uncertainties include, among other things, (i) DSL.net's unproven business model, which may not be successful; (ii) DSL.net's ability to execute its business plan in a timely manner to generate sufficient revenue, contain certain discretionary spending or achieve certain other business plan objectives; (iii) regulatory, legislative and judicial developments, which could adversely affect the way DSL.net operates its business; (iv) competition; and (v) DSL.net's dependence on wholesale providers to provide it with local DSL and T-1 facilities in areas where it has not deployed its own equipment. Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. DSL.net undertakes no obligation, and disclaims any obligation, to update or revise the information contained in this press release, whether as a result of new information, future events or circumstances or otherwise. For additional information regarding these and other risks faced by DSL.net, see the disclosure contained under "Risk Factors'' in DSL.net's Annual Report on Form 10-K for the year ended December 31, 2003, which has been filed with the Securities and Exchange Commission.

DSL.net is a trademark of DSL.net, Inc. Other company names may be trademarks of their respective owners.