MPE Bank of America Corp. Market Index Target Term Securities (Mitts) Linked TO The S&P 500 Index

Mpower Second Quarter Earnings Conference Call and Webcast ROCHESTER, N.Y., July 21 /PRNewswire-FirstCall/ -- Mpower Communications Corp. (AMEX:MPE), a leading provider of data and voice services to retail and wholesale business customers, will host a conference call to discuss the details of its second quarter 2005 financial and operating results. Date: Thursday, August 4, 2005 Time: 10:00 a.m. (Eastern time) Webcast & AudioStreaming Link/Instructions: http://showvisuals.mshow.com/findshow.aspx?usertype=0&cobrand=128&shownumber=2 47775 This link will access both the audio and PowerPoint presentation for the call. Advanced registration on the site is recommended. Click on the link above to register in advance and/or join the conference call at the designated time. Webcast Replay: Available for 30 days after the call at above link Audio Live Number: 1-800-322-0079 Audio Replay Number: 1-877-519-4471, PIN #6295859 From Thursday, August 4, 2005 at 1:00 p.m. Eastern through Thursday, August 11, 2005 at 5:00 p.m. Eastern About Mpower Communications Founded in 1996, Mpower Communications (AMEX:MPE) is a leading facilities-based broadband communications provider offering a full range of data, telephony, Internet access and Web hosting services for retail business and wholesale customers. Further information about the company can be found at http://www.mpowercom.com/ . 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 Web site: http://www.mpowercom.com/

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