EXHIBIT 23.1
CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our reports dated February 16, 2000
included in MGC Communications, Inc.'s Annual Report on Form 10-K for the year
ended December 31, 1999 and Current Report on Form 8-K dated March 13, 2000 and
to all references to our Firm included in this registration statement.
/s/ Arthur Andersen LLP
ARTHUR ANDERSEN LLP
Las Vegas, Nevada
June 23, 2000
