Exhibit 21.1

 

Name   Ownership Percentage   Jurisdiction of Organization
Tropical Communications, Inc.   100%   Florida
Rives-Monteiro Engineering, LLC   49%   Alabama
Rives-Monteiro Leasing, LLC   100%   Alabama
T N S, Inc.   100%   Illinois
ADEX Corporation   100%   New York
ADEXCOMM Corporation   100%   Florida
ADEX Puerto Rico LLC   100%   Puerto Rico
AW Solutions, Inc.   100%   Florida
AW Solutions Puerto Rico, LLC   100%   Puerto Rico
Integration Partners - NY Corporation   100%   New Jersey
RentVM, Inc.   100%   New Jersey
Nottingham Enterprise LLC   40%   Oklahoma
SDN Essentials, LLC   100%   California