Exhibit 31.1
CERTIFICATION PURSUANT TO EXCHANGE ACT RULES 13a-14(a) AND 15d-14(a), AS ADOPTED PURSUANT
TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
Principal Executive Officer
I, William J. Ruckelshaus, certify that:
| 1. | I have reviewed this amended quarterly report on Form 10-Q/A of InfoSpace, Inc.; |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; |
Dated: August 30, 2011
| /s/ William J. Ruckelshaus |
| William J. Ruckelshaus |
| Chief Executive Officer and President |
| (Principal Executive Officer) |
