ATN International, Inc., through its subsidiaries, provides telecommunications services. It operates in three segments: International Telecom, US Telecom, and Renewable Energy. The International Telecom segment provides fixed data and voice; fixed, carrier, managed, and mobility services to customers in Bermuda, the Cayman Islands, Guyana, and the US Virgin Islands, as well as video services in Bermuda, the Cayman Islands, and the US Virgin Islands.

This segment also offers mobile, data, and voice services to retail and business customers in Bermuda, Guyana, and US Virgin Islands under the One, GTT+, and Viya brands; roaming services; and handsets and accessories. The US Telecom segment provides carrier services, such as wholesale roaming services; fixed, mobility, carrier, and managed services to business and consumer; private network services to enterprise and consumer customers; and site maintenance services and international long-distance services, as well as leases critical network infrastructure, including towers and transport facilities. The Renewable Energy segment provides distributed generation solar power to commercial and industrial customers in India.

The company was formerly known as Atlantic Tele-Network, Inc. and changed its name to ATN International, Inc. in June 2016.