RECKSON ASSOCIATES REALTY CORP.
                                  EXHIBIT 32.1

         CERTIFICATION OF DONALD J. RECHLER, CO-CHIEF EXECUTIVE OFFICER
                       OF RECKSON ASSOCIATES REALTY CORP.,
  PURSUANT TO SECTION 1350 OF CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE



I, Donald J. Rechler, Co-Chief Executive Officer of Reckson Associates Realty
Corp. (the "Company"), certify pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, 18 U.S.C. Section 1350, that:

     1)  The Quarterly Report on Form 10-Q of the Company for the quarterly
         period ended June 30, 2003 (the "Report") fully complies with the
         requirements of Section 13(a) or 15(d) of the Securities Exchange Act
         of 1934 (15 U.S.C. 78m or 78o(d)); and

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

Dated:  August 8, 2003


                           By      /s/ Donald J. Rechler
                             ---------------------------------------------------
                                   Donald J. Rechler, Co-Chief Executive Officer


A signed original of this written statement required by Section 906 has been
provided to Reckson Associates Realty Corp. and will be furnished to the
Securities and Exchange Commission or its staff upon request.