EXHIBIT 21 DDL ELECTRONICS, INC. SUBSIDIARIES OF THE REGISTRANT All subsidiaries are 100% owned by DDL Electronics, Inc., except as otherwise indicated, and are included in the consolidated financial statements. Each subsidiary was organized in the jurisdiction specified under its name in the following list. Aeroscientific Corp. (California) (99.9%-owned by DDL Electronics, Inc.) California Aeroscientific Corp. (Oregon) (100%-owned by Aeroscientific Corp.(California)) Oregon A.J. Electronics, Inc. California DDL Europe Limited Northern Ireland DDL Electronics Limited (100%-owned by DDL Europe Limited) Northern Ireland Irlandus Circuits Limited (100% owned by DDL Europe Limited) Northern Ireland SMTEK, Inc. California