Exhibit 21.1

Subsidiaries of the Registrant

Set forth below is a list of the significant subsidiaries of the Company as of
July 31, 1996.

Burnup & Sims Communication Services, Inc.
Burnup & Sims ComTec, Inc.
Burnup & Sims Network Designs
Burnup & Sims of California, Inc.
Burnup & Sims of Texas, Inc.*
Burnup & Sims of the Carolinas, Inc.
Burnup & Sims TelCom of Florida, Inc.
Burnup & Sims TSI, Inc.
Carolina Com-Tec, Inc.?
Church & Tower, Inc.+
Church & Tower Fiber Tel, Inc.
Church & Tower of Florida, Inc.+
Church & Tower of TN, Inc.
Designed Traffic Installation Co., Inc.+
LatLink Corporation
MasTec International, Inc.
MasTec Teleport, Inc.
Sistemas e Instalaciones de Telecomunicacion, S.A. #
Utility Line Maintenance, Inc. @

The jurisdiction of incorporation for each of the subsidiaries is Delaware
except the following:  *Texas, +Florida, @ Georgia, #Spain, ?North Carolina.
All operating subsidiaries of the Company are 100% owned, with the exception of
MasTec Teleport, Inc. which is 80% owned.