Infogroup (IUSA) 10-Q 2005 Q2 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Pursuant to 18 U.S.C. §1350 (as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002), I, the undersigned Chief Executive Officer of infoUSA Inc. (the “Company”), hereby certify that to the best of my knowledge, (i) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended June 30, 2005 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2005

/s/ Vinod Gupta

Vinod Gupta,

Chief Executive Officer