1
EXHIBIT 99.1
AGREEMENT
Pursuant to Rule 13d-1(k)(1) under the Securities Exchange
Act of 1934, the undersigned hereby agree that only one statement containing
the information required by Schedule 13D (or any amendment thereof) need be
filed on their behalf with respect to the beneficial ownership of any equity
securities of EarthLink, Inc., or any subsequent acquisitions or disposition of
equity securities of EarthLink, Inc., by any of the undersigned.
Date: February 14, 2000
ITC HOLDING COMPANY, INC.
/s/ Xxxxxxxxx X. Xxxxxxxx
By: Xxxxxxxxx X. Xxxxxxxx
-------------------------------------
Title: Senior Vice President - General Counsel
and Secretary
ITC SERVICE COMPANY
/s/ Xxxxxxxxx X. Xxxxxxxx
-------------------------------------
By: Xxxxxxxxx X. Xxxxxxxx
Title: Senior Vice President - General Counsel
and Secretary