Exhibit 21.1

INTERNAP NETWORK SERVICES CORPORATION

LIST OF SUBSIDIARIES

Internap Corporation

Internap Holding Corporation

Sockeye Networks, Inc.

netVmg, Inc.

Internap Technologies, Inc.

CO Space, Inc.

CO Space Services, LLC

CO Space Properties, LLC

CO Space Construction, LLC

VPNX.com, Inc.

Internap (Bermuda) Limited

Internap Network Services U.K. Limited

Internap Network Services B.V.

Internap Technologies (Bermuda) Ltd.

Internap Technologies B.V.

Internap Network Services (HK) Limited

Internap Network Services (Singapore) Pty Limited

Internap Network Services (Australia) Ltd.