EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS To the Board of Directors Motient Corporation: We hereby consent to the Incorporation by reference in the Registration Statement on Form S-8 (No. 333-92326) of Motient Corporation and Subsidiaries of our report dated March 17, 2004 relating to the consolidated financial statements and financial statement schedule, which appears in this Form 10-K. Ehrenkrantz Sterling & Co. LLC Livingston, NJ March 18, 2004