ROCHESTER, NY—February 27, 2004—Mpower Communications Corp. (OTCBB:MPE), a leading provider of broadband high-speed Internet access and local and long distance voice services, will be making an investor presentation on Monday, March 1, 2004 at 2:00 p.m. ET. The presentation is part of The Wall Street Analyst Forum held at the Roosevelt Hotel located at 45 East 45th Street in New York City.

Mpower Communications Chairman and Chief Executive Officer Rolla P. Huff and Chief Financial Officer S. Gregory Clevenger will present an overview of the company, its growth strategies and position within the telecommunications industry.

A Web cast of this presentation will be available at www.firstcallevents.com/service/6944_Agenda1.html.

About Mpower Holding Corporation
Mpower Holding Corporation (OTCBB:MPE) 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 www.mpowercom.com.