U.S. Sprint Communications Company Limited Partnership

U.S. Telecom International Inc.

U.S. West Communications, Inc.

Ubowski Richard M.

Uddenfeldt Jan-Erik

Uleske Shawn P.

Ultratec, Incl

Ulysses Holding LLC

Underwood Sidney L.

Unger David G.

Unger Nicholas K.

Unilink Corporation

Unipoint Holdings, Inc.

Unisys PulsePoint Communication

Unisys PulsePoint Communications

United Stated Advanced Network, Inc.

United States Advance Network, Inc.

United States Advanced Network, Inc.

Universal Services, Inc.

Uppaluru Premkumar V.