EXHIBIT 21

Subsidiaries of the Company

Digi International GmbH

Digi International (HK) Ltd.

Digi International Kabushikikaisha

Digi International Limited

Digi International SARL

ITK International, Inc.

NetSilicon, Inc.

Digi International Spain S.A.

Sarian Systems, Ltd.

Spectrum Design Solutions Inc.

Digi Wireless Singapore Pte. Ltd.

Digi m2m Solutions India Pvt. Ltd.