Exhibit 21.1

USA MOBILITY, INC. Arch Wireless, Inc. USA Mobility Wireless, Inc. USA Mobility, Inc. and Subsidiaries Legal Entity Chart GTES, Inc. (Canadian) Metrocall Ventures, Inc. Paging Network Canadian Holdings, Inc. Madison Telecommunications Holdings, Inc. (Canadian) Paging Network of Canada, Inc. (Canadian) 10% GTES, LLC 100% P H O H H P - Parent Company H - Holding Company O - Operating Company CO - Canadian Operating Company CO CO CO