Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT
Legal Name	Doing Business As	State or Other Jurisdiction of Incorporation or Organization
Black Box Corporation	Black Box Corporation	Delaware
ACS Communications, Inc.	ACS Communications, Inc.	Texas
ACS Dataline of the Northwest, Inc.	Black Box Network Services Black Box Network Services - Northwest Black Box Network Services - West	Oregon
ACS Investors, LLC	ACS Investors, LLC	Delaware
ACS Dataline, LP	Black Box Network Services Black Box Network Services - West	Texas
BBOX Holdings Puebla LLC	BBOX Holdings Puebla LLC	Delaware
Black Box Chile S.A.	Black Box Chile S.A.	Chile
Black Box Corporation of Pennsylvania	Black Box Network Services Black Box Network Services - Technology Product Solutions	Delaware
BB Technologies, Inc.	BB Technologies, Inc.	Delaware
Black Box A/S	Black Box A/S	Denmark
Black Box Canada Corporation	Black Box Canada Corporation	Canada
Black Box Comunicaciones, S.A.	Black Box Comunicaciones, S.A.	Spain
Black Box do Brasil Industria e Comercio Ltda.	Black Box do Brasil Industria e Comercio Ltda.	Brazil
Black Box France	Black Box France	France
Black Box GmbH	Black Box GmbH	Austria
Black Box Holdings Ltd.	Black Box Holdings Ltd.	Cayman Islands
Black Box International Holdings B.V.	Black Box International Holdings B.V.	Netherlands
BBOX Holdings Mexico LLC	BBOX Holdings Mexico LLC	Delaware
Black Box de Mexico, S. de R.L. de C.V.	Black Box de Mexico, S. de R.L. de C.V.	Mexico
Black Box Deutschland GmbH	Black Box Deutschland GmbH	Germany
Black Box International B.V.	Black Box International B.V.	Netherlands
Black Box Software Development Services Limited	Black Box Software Development Services Limited	Ireland
Black Box Network Services AG	Black Box Network Services AG	Switzerland

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Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT
Legal Name	Doing Business As	State or Other Jurisdiction of Incorporation or Organization
Black Box Network Services Australia Pty Ltd	Black Box Network Services Australia Pty Ltd	Australia
Black Box Network Services New Zealand Limited	Black Box Network Services New Zealand Limited	New Zealand
Black Box Network Services Co., Ltd.	Black Box Network Services Co., Ltd.	Japan
Black Box Network Services India Private Limited	Black Box Network Services India Private Limited	India
Black Box Network Services Korea Limited	Black Box Network Services Korea Limited	Korea
Black Box Network Services NV	Black Box Network Services NV	Belgium
Black Box Network Services S.r.l.	Black Box Network Services S.r.l.	Italy
Black Box Network Services (UK) Limited	Black Box Network Services (UK) Limited	England
Black Box P.R. Corp.	Black Box P.R. Corp.	Puerto Rico
Black Box Finland OY	Black Box Finland OY	Finland
Black Box Network Services AB	Black Box Network Services AB	Sweden
Black Box Network Services Corporation	Black Box Network Services Corporation	Taiwan
Black Box Network Services (Dublin) Limited	Black Box Network Services (Dublin) Limited	Ireland
Black Box Network Services SDN. BHD.	Black Box Network Services SDN. BHD.	Malaysia
Black Box Network Services Singapore Pte Ltd	Black Box Network Services Singapore Pte Ltd	Singapore
Black Box Network Services, Inc. - Government Solutions	Black Box Network Services, Inc. - Government Solutions	Tennessee
Black Box Norge AS	Black Box Norge AS	Norway
Black Box Services Company	Black Box Services Company	Delaware
Black Box Ventures Holding Company	Black Box Ventures Holding Company	Delaware
CBS Technologies Corp.	Black Box Network Services	New York
Delaney Telecom, Inc.	Black Box Network Services Black Box Network Services - East	Pennsylvania
InnerWireless, Inc.	Black Box Network Services Black Box Network Services - Wireless	Delaware

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Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT
Legal Name	Doing Business As	State or Other Jurisdiction of Incorporation or Organization
Midwest Communications Technologies, Inc.	Black Box Network Services Black Box Network Services - Midwest Black Box Network Services - Ohio	Ohio
Nu-Vision Technologies, LLC	Black Box Network Services Black Box Network Services - Oregon	New York
Mutual Telecom Services Inc.	Black Box Network Services Black Box Network Services - Needham	Delaware
Norstan Communications, Inc.	Black Box Network Services Black Box Network Services - Minnesota Black Box Network Services - Montana Black Box Network Services - Northeast	Minnesota
NextiraOne, LLC	Black Box Network Services Black Box Network Services - Illinois Black Box Network Services - Midwest Black Box Network Services - Northeast Black Box Network Services - Northwest Black Box Network Services - South	Delaware
NextiraOne Federal, LLC	Black Box Network Services Black Box Network Services - Federal	Delaware
NextiraOne New York, LLC	Black Box Network Services	Delaware
Norstan Canada, Ltd./Norstan Canada, Ltee	Black Box Network Services	Canada
Vibes Technologies, Inc.	Black Box Resale Services	Minnesota
Scottel Voice & Data, Inc.	Black Box Network Services Black Box Network Services - Pacific	California

3