<PAGE> 1
Exhibit 21.1
SUBSIDIARIES OF THE COMPANY
<TABLE>
<CAPTION>
STATE OF
NAME LOCATION INCORPORATION
---- -------- -------------
<S> <C> <C>
Black Box Corporation
Bbox Holding Company Wilmington, Delaware, USA Delaware
ATIMCO Network Services, Inc. Pittsburgh, Pennsylvania, USA Pennsylvania
American Telephone Wiring Company Charleston, West Virginia, USA West Virginia
Midwest Communications Technologies, Inc. Columbus, Ohio, USA Ohio
Associated Network Solutions, Inc. St. Petersburg, Florida, USA Florida
Advanced Communications Corporation Columbia, South Carolina, USA South Carolina
Ohmega Installations Limited Newbury, Berkshire, England
Cable Consultants, Incorporated Atlanta, Georgia, USA Georgia
Todd Communications, Inc. Winston-Salem, North Carolina, USA North Carolina
Comm Line, Inc. Cincinnati, Ohio, USA Ohio
Business Communication Concepts, Inc. Sterling, Virginia, USA Virginia
Koncepts Communications of L.I., Corp. Westbury, New York, USA New York
Communication Contractors, Inc. Chicago, Illinois, USA Illinois
DataCom-Link, Inc. Indianapolis, Indiana, USA Indiana
U.S. Premise Networking Services, LLC Minneapolis, Minnesota, USA Minnesota
Datech Holdings Limited Nottingham, England
Black Box Network Services, Inc. -
Government Solutions Murfreesboro, Tennessee, USA Tennessee
Parrish Communication Cabling, Inc. Seattle, Washington, USA Washington
R&D Services, Inc. Westboro, Massachusetts, USA Massachusetts
Delaney Telecom, Inc. Philadelphia, Pennsylvania, USA Pennsylvania
Delaney Electrical Services, Inc. Philadelphia, Pennsylvania, USA Pennsylvania
K&A Communications, Inc. St. Louis, Missouri, USA Missouri
Jet Line Communications, Inc. Dallas, Texas, USA Texas
A.T.S., Inc. Huntington, West Virginia, USA West Virginia
Advanced Network Technologies, Inc. Victorville, California, USA California
Teldata Corporation Nashville, Tennessee, USA Tennessee
ST Communications and Cabling, Inc. Kansas City, Missouri, USA Missouri
GMCI NetComm, Inc. Dallas, Texas, USA Texas
Allcom Electric, Inc. New York City, New York, USA New York
Black Box Network Services Baltimore, Inc. Columbia, Maryland, USA Delaware
</TABLE>
<PAGE> 2
<TABLE>
<CAPTION>
STATE OF
NAME LOCATION INCORPORATION
---- -------- -------------
<S> <C> <C>
Black Box Network Services Greater
Pittsburgh, Inc. Cranberry, Pennsylvania, USA Delaware
Carey Systems Company Dayton, Ohio, USA Ohio
Datel Communications, Inc. Phoenix, Arizona, USA Arizona
Midwest Electronics and Communications, Inc. Denver, Colorado, USA Colorado
Data Specialties Europe Ltd. Bury St. Edmunds, England
Black Box Corporation of Pennsylvania Lawrence, Pennsylvania, USA Delaware
Black Box Catalogue, Ltd. Reading, England
Black Box Canada Corporation Ontario, Canada
Black Box Foreign Sales Corporation St. Thomas, U.S.V.I.
Black Box France, S.A. Rungis, France
Black Box Datacom, B.V. Utrecht, Netherlands
Black Box Communication SANV Zaventum, Belgium
Indacom N.V. Mechelen, Belgium
Blue Box, B.V. Hoofdorp, Holland
Ascor bvba Mechelen, Belgium
BB Technologies, Inc. Wilmington, Delaware, USA Delaware
Datacom Black Box Services AG Altendorf, Switzerland
Black Box Deutschland GmbH Munich, Germany
Black Box Italia, SpA Vimodrone, Italy
Black Box Japan Kabushiki Kaisha Tokyo, Japan
Black Box Catalog Australia Pty. Ltd. Croydon VIC, Australia
Black Box Catalog New Zealand Limited Wellington, New Zealand
Black Box do Brazil Industria e Comercio Ltda. Sao Paulo, Brazil
Black Box de Mexico, S.A. de C.V. Mexico City, Mexico
Alpeco Puerto Rico, Inc. San Juan, Puerto Rico
South Hills Datacomm Chile, S.A. Santiago, Chile
Black Box Comunicaciones, SA Madrid, Spain
Schoeller Connectivity Gmbh Vienna, Austria
</TABLE>
