EXHIBIT 21.1

DESCRIPTION: SUBSIDIARIES OF THE REGISTRANT

EXHIBIT 21.1 LIST OF SUBSIDIARIES OF THE REGISTRANT

InfoSpace Investments, Ltd., a UK corporation.
Outpost Network, Inc., a Washington corporation.
InfoSpaceCanada.com, Inc., a Delaware corporation.
InfoSpace.com Canada Holdings Inc., an Ontario corporation.
InfoSpace.com Nova Scotia Company, a Nova Scotia unlimited liability company.

Union Acquisition Corporation, a Washington corporation.