**Exhibit      32**

| **CERTIFICATION                PURSUANT TO**                                    |
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| **18                U.S.C. SECTION 1350,**                                      |
| **AS                ADOPTED PURSUANT TO**                                       |
| **SECTION                906 OF THE SARBANES-OXLEY ACT OF                2002** |

| In                connection with the Quarterly Report of Mpower Holding Corporation                (the                "Company") on Form 10-Q for the period ending June 30, 2005 as filed                with                the Securities and Exchange Commission on the date hereof (the "Report"),                the undersigned, Rolla P. Huff, Chief Executive Officer of the Company                and                S. Gregory Clevenger, Chief Financial Officer of the Company, certify,                pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the                Sarbanes-Oxley Act of 2002, that to the best of our                knowledge: |
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| (1)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | The                Report fully complies with the requirements of section 13(a) or 15(d)                of                the Securities Exchange Act of 1934; and |
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| (2)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              | The                information contained in the Report fairly presents, in all material                respects, the financial condition and results of operations of the                Company. |

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| Date: August              9, 2005 | By:                          | /s/ Rolla              P. Huff |
|                                   | Rolla                P. Huff           |
|                                   | Chief                Executive Officer |

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| Date: August              9, 2005 | By:                          | /s/ S.              Gregory Clevenger |
|                                   | S.                Gregory Clevenger    |
|                                   | Chief                Financial Officer |

*The      foregoing Certification shall not be deemed incorporated by reference by any      general statement incorporating by reference this report into any filing under      the Securities Act of 1933 or under the Securities Exchange Act of 1934, except      to the extent that we specifically incorporate this information by reference,      and shall not otherwise be deemed filed under such Acts.*

*A      signed original of this written statement required by Section 906 has been      provided to the Registrant and will be retained by the Registrant and furnished      to the Securities and Exchange Commission or its staff upon      request.*