EXHIBIT 32.1

CERTIFICATE OF CHIEF EXECUTIVE OFFICER

AND CHIEF FINANCIAL OFFICER

OF

VYYO INC.

In connection with the Quarterly Report of Vyyo Inc. (the “Company”) on Form 10-Q for the quarter ending March 31, 2004, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Davidi Gilo, as Chief Executive Officer of the Company, and Arik Levi, as Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, to the best of his knowledge, that:

(1) The Report fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/    Davidi Gilo

Davidi Gilo

Chief Executive Officer

April 29, 2004

/s/    Arik Levi

Arik Levi

Chief Financial Officer

April 29, 2004

The foregoing certification is being furnished solely pursuant to 18 U.S.C. § 1350 and is not being filed as part of the Report or as a separate disclosure document.

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.