EXHIBIT 21
SUBSIDIARIES OF INTERDIGITAL, INC.

Subsidiary | Jurisdiction / State of Incorporation or Organization
DRNC Holdings, Inc. | Delaware
DRNC Patents, LLC | Delaware
DST Holdings, Inc. | Delaware
IAC Patents I, LLC | Delaware
IDLR Holdings, Inc. | Delaware
IDPA Holdings, Inc. | Delaware
IDTP Holdings, Inc. | Delaware
InterDigital Administrative Solutions, Inc. | Pennsylvania
InterDigital Asia Limited | South Korea
InterDigital Canada Ltee. | Delaware
InterDigital Capital, Inc. | Delaware
InterDigital Communications, Inc. | Delaware
InterDigital Europe, Ltd. | United Kingdom
InterDigital Holdings, Inc. | Delaware
InterDigital Patent Holdings, Inc. | Delaware
InterDigital Technology Corporation | Delaware
InterDigital UK, Inc. | Delaware
InterDigital Ventures Management, Inc. | Delaware
IPH Patents, LLC | Delaware
IPR Licensing, Inc. | Delaware
IPRL Patents, LLC | Delaware
ITC Patents, LLC | Delaware
Logiciels XcellAir Canada Ltee. | Quebec, Canada
NexStar Capital, LLC | Delaware
NexStar Partners GP, L.P. | Delaware
NexStar Partners, L.P. | Delaware
NexStar Strategic Investments, LLC | Delaware
PCMS Holdings, Inc. | Delaware
Signal Foundation for Wireless Innovation, Inc. | Delaware
VID SCALE, Inc. | Delaware
VID SCALE Patents, LLC | Delaware
WoT.io, Inc. | Delaware
XcellAir, Inc. | Delaware