Exhibit 21.1

List of Subsidiaries as of December 31, 2020

Name of Subsidiary |  | Jurisdiction
Advanced Wireless Group, LLC | ​ | Florida
Boingo Broadband, LLC. | ​ | California
Boingo Holding Participações, Ltda. | ​ | Brazil
Boingo Limited | ​ | England
Boingo LLC | ​ | Delaware
Boingo MDU, LLC | ​ | Delaware
Chicago Concourse Development Group, LLC | ​ | Delaware
Concourse Communications Baltimore, LLC | ​ | Delaware
Concourse Communications Canada, Inc. | ​ | Delaware
Concourse Communications Detroit, LLC | ​ | Delaware
Concourse Communications Group, LLC | ​ | Delaware
Concourse Communications Illinois, LLC | ​ | Illinois
Concourse Communications Minnesota, LLC | ​ | Delaware
Concourse Communications Nashville, LLC | ​ | Illinois
Concourse Communications Ottawa, LLC | ​ | Illinois
Concourse Communications SSP, LLC | ​ | Delaware
Concourse Communications St. Louis, LLC | ​ | Delaware
Concourse Communications UK, Ltd. | ​ | England
Concourse Holding Co., LLC. | ​ | Delaware
Concourse Telecomunicacoes Brasil Ltda | ​ | Brazil
Electronic Media Systems, Inc. | ​ | Florida
Endeka Group, Inc. | ​ | California
InGate Holding, LLC | ​ | Illinois
InGate Technologies, LLC | ​ | Delaware
New York Telecom Partners, LLC | ​ | Delaware
Opti-Fi Networks, LLC | ​ | Delaware
Tego Communications, Inc. | ​ | Delaware

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