Mpower Communications Packages a Perfect Fit for Extra Space Storage ANAHEIM, Calif., Nov. 24 /PRNewswire-FirstCall/ -- Mpower Communications Corp. (BULLETIN BOARD: MPOW) , a leading provider of high-speed Internet access and local and long distance voice services, today announced that it has been chosen by Extra Space Storage to provide integrated communications solutions for ten of its locations in Nevada and California. Extra Space Storage is a nationwide, state-of-the-art self-storage company that offers its customers the convenience and safety of storage units that include security systems, monitored surveillance and on-site management. Mpower's suite of broadband data products provide Extra Space Storage with a reliable solution to support the security and alarm system applications that are critical to its 24x7 operations. "Having ten of our sites on Mpower's integrated voice and data product not only allows us to provide our customers with the quality of service they demand, but also has improved our inter-office communications and our ability to conduct our day-to-day business operations more efficiently," said Scott Stubbs, Vice President of Extra Space Storage. "Rather than multiple vendors for long distance, local telephone and Internet services, we now have one relationship with Mpower, which means one bill and a single point of contact that provides excellent customer service." Mpower Communications' President of Sales and Marketing Jim Ferguson noted, "From our initial meeting at their Las Vegas location, we took the time to understand the special communications needs of Extra Space Storage's business and how Mpower could support its value proposition to its customers. After showing Extra Space Storage the reliability, flexibility and competitive advantage of doing business with Mpower, we are extremely pleased that they have extended the Mpower solution to a number of their satellite offices." About Extra Space Storage Extra Space Storage is a privately held, growth-oriented self-storage company headquartered in Salt Lake City, Utah. Founded in 1977, Extra Space Storage is a premier developer and operator of convenient, secure, and professional self-storage properties. As of November 2003, Extra Space Storage owns and operates 100 facilities in high-density areas including: New York, New Jersey, Massachusetts, Florida, and California. For additional information on Extra Space Storage, visit http://www.extraspace.com/. About Mpower Holding Corporation Mpower Holding Corporation (OTC:MPOW) (BULLETIN BOARD: MPOW) is the parent company of Mpower Communications, a leading facilities-based broadband communications provider offering a full range of data, telephony, Internet access and Web hosting services for small and medium-size business customers. Further information about the company can be found at http://www.mpowercom.com/. Forward-Looking Statements Under the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, Mpower Holding Corporation cautions investors that certain statements contained in this press release that state management's intentions, hopes, beliefs, expectations or predictions of the future are forward-looking statements. Management wishes to caution the reader these forward-looking statements are not historical facts and are only estimates or predictions. Actual results may differ materially from those projected as a result of risks and uncertainties including, but not limited to, receipt of all remaining payments from the previously announced asset sales, future sales growth, market acceptance of our product offerings, our ability to secure adequate financing or equity capital to fund our operations, network expansion, our ability to manage growth and maintain a high level of customer service, the performance of our network and equipment, our ability to enter into strategic alliances or transactions, the cooperation of incumbent local exchange carriers in provisioning lines and interconnecting our equipment, regulatory approval processes, changes in technology, price competition and other market conditions and risks detailed from time to time in our Securities and Exchange Commission filings. The company undertakes no obligation to update publicly any forward-looking statements, whether as a result of future events, new information, or otherwise. DATASOURCE: Mpower Communications Corp. CONTACT: Investors - Gregg Clevenger, Chief Financial Officer +1-585-218-6547, , or Media - Michele Sadwick, Vice President, +1-585-218-6542, , both of Mpower Communications; or Investor Relations - Lester Rosenkrantz of Cameron Associates, +1-212-554-5486, , for Mpower Web site: http://www.mpowercom.com/ http://www.extraspace.com/

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