EXHIBIT 8.1 LIST OF SUBSIDIARIES OF API ELECTRONICS GROUP, INC. 1. API Electronics, Inc., organized under the laws of the state of Delaware; 2. Filtran Inc. organized under the laws of the state of New York; 3. Filtran Limited, organized under the laws of Ontario; 4. Canadian Dataplex Ltd. organized under the federal laws of Canada; and 5. Tactron Communications (Canada) Limited organized under the laws of Ontario.