Michele Sadwick
Vice President of Corporate Communications
585-218-6542
585-218-0881 FAX
msadwick@mpowercom.com

June 24, 2003
Mpower Communications Appoints President of Sales & Marketing to Lead Up-Market Strategy

June 10, 2003
Mpower Communications Hires New Technology Officer

May 29, 2003
Mpower Retains Cameron Associates as Investor Relations Advisor

May 8, 2003
Mpower Holding Reports First Quarter 2003 Results

May 6, 2003
Mpower Adds Sales & Marketing Executive to Board of Directors

May 2, 2003
Mpower Appoints Treasurer

April 8, 2003
Mpower Achieves Fully Funded Status as Sale of Markets Closes

March 28, 2003
Mpower Holding Reports 2002 Results from Continuing Operations

March 19, 2003
Mpower Completes Sale of Michigan and Ohio Operations to LDMI

February 13, 2003
Mpower Holding Reports Fourth Quarter 2002 Results

January 8, 2003
Mpower to Reshape Company through Strategic and Financial Transactions

December 5, 2002
Mpower Holding Initiates Redemption of Remaining Notes Will Clear all Bondholder Debt from Balance Sheet

November 26, 2002
Mpower Holding Retires $48.9 Million in Debt

November 07, 2002
Mpower Holding Reports Third Quarter 2002 Results

August 09, 2002
Mpower Holding Reports Second Quarter 2002 Results

July 30, 2002
Mpower Emerges from Chapter 11 with 90% Less Debt

July 17, 2002
Mpower Recapitalization Plan Approved by the Court Company Expects to Emerge from Chapter 11 on July 30 with 90% Less Debt

May 28, 2002
Mpower Communications Unaffected by Court's Line Sharing Decision

May 15, 2002
Mpower Communications Praises Supreme Court Decision on Network Pricing and Bundling Company Views Court Action as Eliminating Risk and Uncertainty

May 2, 2002
Mpower Holding Reports First Quarter 2002 Results

April 22, 2002
Mpower Holding Schedules First Quarter 2002 Results

April 8, 2002
Mpower Holding Files Pre-Negotiated Recapitalization Plan to Significantly Reduce Debt

April 3, 2002
Mpower Holding Stock to Move to NASD Over The Counter Bulletin Board

March 22, 2002
Mpower Completes Successful Bondholder Solicitation

February 28, 2002
Mpower Launches Bondholder Solicitation

February 25, 2002
Mpower reaches recapitalization agreement

February 11, 2002
Court Dismisses Shareholder Lawsuit Against Mpower

February 7, 2002
Mpower Holding Reports Fourth Quarter and Year-End 2001 Results

January 17, 2002
Mpower Holding Defers Dividend on Preferred Shares and Schedules Fourth Quarter and Year-End 2001 Results

January 7, 2002
Mpower Communications Expands Availability Integrated T1 Product
MpowerOffice Introduced in South Florida

October 19, 2001
Mpower Holding Defers Dividend on Preferred Shares and Schedules Third Quarter Earnings Conference Call

September 26, 2001
Mpower Holding Comments on Impact of Recent Business Trends

September 10, 2001
Mpower Communications Expands Web Hosting Offering

August 29, 2001
Mpower Communications Launches New Integrated Broadband Platform

August 23, 2001
Mpower Holding Retains Rothschild Inc. to Assist in Exploring Options to Strengthen its Balance Sheet and Advise on Issues Related to Bondholder Litigation

August 23, 2001
Mpower Communications Offers Rhythms Business Customers a Simple Transition of Internet Services and Ability to Bundle Voice with Data

August 9, 2001
Mpower Holding Reports Strong Second Quarter Results

August 2, 2001
Mpower Holding Refutes Baseless Lawsuit

July 20, 2001
Mpower Holding Defers Dividend on Preferred Shares and Schedules Second Quarter Earnings Conference Call

July 13, 2001
Mpower Realigns Debt Structure to Reflect New Holding Company

June 28, 2001
Mpower Communications Announces Completion of Holding Company Reorganization

May 24, 2001
Mpower Communications Reports Results of Annual Meeting of Shareholders

May 18, 2001
Mpower Communications Announces Fully Funded Business Plan

May 1, 2001
Mpower Communications Reports First Quarter Results

April 24, 2001
Mpower Communications Defers Dividend on Preferred Shares

April 23, 2001
Mpower First Quarter Earnings Notification

March 27, 2001
Mpower Communications Offers NorthPoint Business Customers a Simple Transition of Broadband Services and Ability to Bundle Voice and Data

February 20, 2001
Mpower Communications Installs Switch in St. Louis Bringing Advanced Voice Communications Services to Business Customers

February 20, 2001
Mpower Communications Extends Relationship With Copper Mountain As Its Primary Broadband DSL Equipment Provider

February 15, 2001
Mpower Communications Reports Fourth Quarter and Year-End 2000 Results

February 7, 2001
Mpower Fourth Quarter Earnings Notification

February 5, 2001
Mpower Communications Adds Broadband Industry Veteran To Lead Service Delivery

January 24, 2001
Mpower Communications Declares Series D Dividend

January 4, 2001
Mpower Communications Affirms Fourth Quarter Expectations

December 11, 2000
Mpower Communications Adopts Stockholder Rights Plan

December 4, 2000
Mpower Reiterates Retail Strategy Catering to Business Customers

October 31, 2000
Mpower Communications Third Quarter Results

October 20, 2000
Mpower Communications Declares Series D Dividend

October 18, 2000
Mpower Third Quarter Earnings Notification

October 4, 2000
Mpower Communications Plans Third Quarter Conference Call

September 26, 2000
Mpower Communications Electronically Bonded with Ameritech and Pacific Bell

September 22, 2000
Mpower Communications Responds to Class Action Lawsuit

September 20, 2000
Mpower Communications Broadens Midwest Presence

September 7, 2000
Mpower Communications Issues Revised Financial Forecasts

August 29, 2000
Mpower Communications Three-for-Two Stock Split Becomes Effective

August 28, 2000
Mpower Communications Completes Exchange Offer

August 28, 2000
Mpower Communications Appoints President-Operations and President-Sales & Marketing

August 23, 2000
Mpower Communications Extends Exchange Offer

August 22, 2000
Mpower Communications Expands Into Texas

August 3, 2000
Mpower Communications Reports Record Second Quarter 2000 Results

July 24, 2000
Mpower Communications Adds Hardware to Voice and Data Bundle For Simple and Effective Communications Solution

July 21, 2000
Mpower Communications Announces Three-for-Two Stock Split

July 18, 2000
Mpower Communications Declares Series D Dividend

June 26, 2000
Mpower Communications Completes Acquisition of Primary Network

June 5, 2000
Mpower Communications Consummates Private Exchange Offer and Consent Solicitation

June 1, 2000
Mpower Communications Announces Receipt of Requisite Consents To Amend the Indenture Governing its 13% Senior Secured Notes due 2004

May 31, 2000
Mpower Communications Further Strengthens Management Team; Appoints 17-Year Industry Veteran to Launch Northeast Operations

May 31, 2000
Mpower Communications Announces Volume Rollout of Tollbridge Gateways to Extend Its Growing VoSDSL Footprint

May 23, 2000
Mpower Communications Announces Debt Exchange Offering

May 23, 2000
Mpower Communications Appoints Chief Information Officer

May 4, 2000
Mpower Communications Announces Solid First Quarter 2000 Results

May 2, 2000
Mpower Communications Offers High-Speed DSL Connectivity in Two New Markets

April 27, 2000
Mpower Communications and Biztro, Inc.™ Join Forces to Bring Web-based Solutions to Growing Businesses

April 25, 2000
Mpower Communications Plans Expansion into Northwest Region

April 18, 2000
Mpower Communications Trials Lucent Technologies' PathStar To Deliver IP-Based Broadband Communications

April 18, 2000
Mpower Communications Declares Series D Dividend

April 17, 2000
Mpower Communications to Acquire Primary Network

April 12, 2000
Mpower Communications Launches Data Strategy with New Internet Service Delivery Hub

April 3, 2000
Mpower Communications Names Point Person To Accelerate Data Strategy Through Business Portal

March 28, 2000
Former AT&T CFO Richard Miller Joins Mpower Communications Board of Directors

March 27, 2000
Mpower Communications Closes $250 Million Debt Offering

March 22, 2000
Mpower Communications Receives Certification in Four States and Washington, D.C.

March 13, 2000
Mpower Communications Initiates $250 Million Bond Offering

March 1, 2000
Mpower Communications Appoints Former AT&T Wireless Executive to Oversee National DSL Build-out

February 28, 2000
Mpower Communications Deploys DSET Gateway Solutions to Interconnect with Seven Major Local Carriers

February 17, 2000
Mpower Communications Announces Fourth Quarter and Year-End 1999 Results

February 15, 2000
Mpower Communications Launches National Expansion Plans for 2000

February 11, 2000
Mpower Communications Raises Nearly $540 Million in Primary Common and Preferred Offering

January 26, 2000
Mpower Communications Names 20-year Veteran to Lead Marketing Strategy

January 18, 2000
Mpower Communications, formerly MGC Communications, Begins Trading Today as 'MPWR' on Nasdaq

January 12, 2000
MGC Communications to Become Mpower Communications; New Brand Exemplifies Company's Culture and Commitment to Customers

January 11, 2000
MGC Communications Names Vice President Human Resources

January 10, 2000
MGC Communications Appoints Goldman Sachs Banker to Lead Corporate Development

January 10, 2000
MGC Communications Names Russ Zuckerman Director of Legal Affairs

November 30, 1999
MGC Communications Appoints Regional President for Midwest Operations

November 15, 1999
MGC Communications, Inc. Announces Public Offering of its Equity Securities

November 15, 1999
MGC Communications and PurchasePro.com to Co-Market E-Business Solutions

November 15, 1999
MGC Communications Appoints Michael Daley as Chief Financial Officer

October 14, 1999
MGC Communications Names Rolla Huff President and Chief Executive Officer

October 11, 1999
MGC Introduces 'Total Solutions' VoSDSL in Las Vegas

October 4, 1999
MGC Communications Deploys Tollbridge Technologies for Voice Over DSL

September 27, 1999
MGC Communications Selects Turnstone's Copper CrossConnect to Enable More Efficient, Affordable DSL Service Delivery

September 23, 1999
MGC Communications to Employ Copper Mountain DSL Concentrators for Integrated DSL Solution

September 16, 1999
FCC Decision Benefits MGC Confirms Availability of UNEs and Reinforces MGC's 'Smart Build Strategy

September 14, 1999
MGC Announces Milestones in Atlanta Establishes 36 Collocations Lines Sold and Installed Surpasses 21,000

September 14, 1999
MGC Announces Milestones in Southern California Collocation Sites of 120 Addressable Market of Over 7 Million Lines

August 2, 1999
MGC Communications Settles Antitrust Lawsuit Against Sprint

July 27, 1999
MGC Communications, Inc. Announces Completion of 5 Million Share Offering of Stock at $25

April 5, 1999
MGC and Providence Equity Announce $47.5 Million Purchase of Convertible Preferred Stock

March 1, 1999
MGC Communications Supports Recent FCC Ruling on Dial-Up Internet Traffic

February 17, 1999
MGC Communications Files Antitrust Lawsuit Against Sprint Corp

February 3, 1999
MGC Communications Announces Recent Accomplishments

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