Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350
TYCO INTERNATIONAL LTD.
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officers of Tyco International Ltd. (the “Company”) hereby certify to their knowledge that the Company’s quarterly report on Form 10-Q for the period ended December 30, 2005 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ EDWARD D. BREEN

Edward D. Breen
Chief Executive Officer
February 7, 2006

/s/ CHRISTOPHER J. COUGHLIN

Christopher J. Coughlin
Chief Financial Officer
February 7, 2006