Nextel Communications 10-Q 2005 Q2 Quarterly report

Exhibit 32.1

Section 1350 Certification

      In connection with the Quarterly Report of Nextel Communications, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2005 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Timothy M. Donahue, President and Chief Executive Officer of the Company, certify pursuant to 18 U.S.C.§ 1350 (as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002) that, to the best of my knowledge:

      (1) the Report fully complies with the requirements of Section 13(a) or 15(d) 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.

Date: July 28, 2005

/s/Timothy M. Donahue

_______________________________________
Timothy M. Donahue

Chief Executive Officer