Exhibit 21.1

Subsidiaries of the registrant

InfoSpace LLC, a Delaware limited liability company

TaxAct Holdings, Inc., a Delaware corporation

TaxAct, Inc., an Iowa corporation (“TaxACT”)

SimpleTax Software, Inc., a British Columbia corporation

Monoprice Holdings, Inc., a Delaware corporation

Monoprice, Inc., a California corporation (“Monoprice”)

Project Baseball Sub, Inc., a Delaware corporation

HDV Holdings, Inc., a Delaware corporation

H.D. Vest, Inc., a Texas corporation ("HD Vest")