EXHIBIT 32

CERTIFICATIONS PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)

The undersigned officers of Motient Corporation, a Delaware corporation (the “Company”), do hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to their knowledge:

(i) the Quarter Report on Form 10-Q of the Company for the quarter period ended March 31, 2007, as filed with the Securities and Exchange Commission (the “Report”) fully complies with the requirements of Section 13(a) or Section 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 result of operations of the Company.

/s/    ROBERT H. BRUMLEY        

Robert H. Brumley

President and Chief Executive Officer

(Principal Executive Officer)

May 10, 2007

/s/    NEIL L. HAZARD        

Neil L. Hazard

Executive Vice President and Chief Financial Officer (Principal Financial Officer)

May 10, 2007

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