Contact Us | 1.978.619.1300 Our Companies About Us News Careers Corporate Responsibility Investor Relations We are Operators We are a global holding company with a portfolio of communication companies. Learn More Latest News: ATN Reports Third Quarter 2021 Results 10.27.21 Communications From our origins as a rural carrier to our current multinational, wireless and wireline portfolio of telecommunications operating businesses, ATN is driven by a long term, value-based approach and we take particular pride in bringing advanced services to the under-served. More Renewable Energy Our solar sites provide a reliable and inexpensive alternative to traditional energy sources, offering dynamic prospects for growth domestically and abroad. More ATN and its portfolio of subsidiaries invest in and operate telecommunications and renewable energy companies in the U.S. and internationally. More 500 Cummings Center, Suite 2450, Beverly, MA 01915 1.978.619.1300 ir@atni.com Careers Supplier Info © 2021 ATN International, Inc. All Rights Reserved.

Contact Us | 1.978.619.1300 Our Companies About Us News Careers Corporate Responsibility Investor Relations Contact Address 500 Cummings Center Suite 2450 Beverly, MA 01915 General Inquiries (978) 619-1300 ir@atni.com Contact Us Investor Relations (212)750-5800 Lynn.morgen@advisiry.com Your name * Your e-mail address * Subject * Message * 500 Cummings Center, Suite 2450, Beverly, MA 01915 1.978.619.1300 ir@atni.com Careers Supplier Info © 2021 ATN International, Inc. All Rights Reserved.