Exhibit 21.1

INTERNAP NETWORK SERVICES CORPORATION  

LIST OF SUBSIDIARIES

Internap Holding Corporation	Delaware
Sockeye Networks, Inc.	Delaware
VitalStream Holdings, Inc.	Nevada
VitalStream, Inc.	Delaware
VitalStream  Broadcasting Corporation	Nevada
Playstream, Inc.	Nevada
VitalStream Advertising Services, Inc.	Nevada
netVmg, Inc.	Delaware
Internap Technologies, Inc.	Washington
CO Space, Inc.	Delaware
CO Space Services, LLC	Delaware
CO Space Properties, LLC	Delaware
CO Space Construction, LLC	Delaware
CO Space Services Texas, LP	Delaware
CO Space Properties Texas, LP	Delaware
VPNX.com, Inc.	Delaware
Internap (Bermuda) Limited	Bermuda
Internap Network Services U.K. Limited	United Kingdom
Internap Network Services B.V.	Netherlands
Internap Technologies (Bermuda) Limited	Bermuda
Internap Technologies B.V.	Netherlands
Internap Network Services (HK) Limited	Hong Kong
Internap Network Services (Singapore) Pte Limited	Singapore
Internap Network Services (Australia) Ltd.	Australia
Internap Network Services Canada	Canada
Internap Japan Co., Ltd.*	Japan

* Not wholly-owned.