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EXHIBIT 23.1
CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
As independent public accountants, we hereby consent to the incorporation by
reference in this Form S-8 Registration Statement of our report dated February
4, 2000 (except for the matter discussed in Note 10 of the Consolidated
Financial Statements, as to which the date is February 7, 2000) included in
FASTNET Corporation's Form 10-K for the year ended December 31, 1999 and to all
references to our firm included in this Form S-8 Registration Statement.
/s/ Arthur Andersen LLP
Philadelphia, Pa.
August 4, 2000
