EXHIBIT 21

Subsidiaries of Numerex Corp.

BNI Solutions, Inc.

Cellemetry, LLC

Cellemetry Services, LLC

DCX Systems, Inc.

DCX Systems (Australia) PTY Limited (Incorporated in Australia)

Digilog, Inc.

NextAlarm, LLC

Numerex Government Services, LLC

Numerex International Limited

Numerex Solutions, LLC

Orbit One Communications, LLC

uBlip, Inc.

Uplink Security, LLC

Each of our subsidiaries is owned directly by Numerex Corp.