Exhibit 15.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of InfoSpace, Inc. on Form S-8 of our report dated March 10, 2000 relating to the consolidated financial statements of InfoSpace, Inc. included in its Annual Report on Form 10-K for the year ended December 31, 1999. /s/ Deloitte & Touche LLP - ---------------------------- DELOITTE & TOUCHE LLP Seattle, Washington May 17, 2000