ATN to Host Third Quarter 2024 Financial Results Conference Call on October 30, 2024

ATN International, Inc. (“ATN” or the “Company”) (Nasdaq: ATNI), a leading provider of digital infrastructure and communications services, announced today that it will release third quarter 2024 results on Tuesday, October 29, 2024, after market close. The Company will host a conference call to discuss its results at 10:00 a.m. ET on Wednesday, October 30, 2024.

Key details regarding the call are as follows:

Call Date: Wednesday, October 30, 2024 Call Time: 10:00 a.m. ET Webcast Link: https://edge.media-server.com/mmc/p/i66c89kiLive Call Participant Link: https://register.vevent.com/register/BIbf889f89a57e4183ba9dbe6725fa759d

Webcast Link Instructions You can listen to a live audio webcast of the conference call by visiting the “Webcast Link” above or the "Events & Presentations" section of the Company's Investor Relations website at https://ir.atni.com/events-and-presentations. A replay of the conference call will be available at the same locations beginning at approximately 1:00 pm ET on the same day. The Company also will provide an investor presentation as a supplement to the call on the “Events & Presentations” section of its Investor Relations website.

Live Call Participant Instructions To participate in the live call, you must register using the “Live Call Participant Link” above. Once registered, you will receive dial-in numbers and a unique PIN number. When you dial in, you will input your PIN and be routed into the call. If you register and forget your PIN, or lose the registration confirmation email, simply re-register to receive a new PIN.

About ATN ATN International, Inc. (Nasdaq: ATNI), headquartered in Beverly, Massachusetts, is a leading provider of digital infrastructure and communications services for all. The Company operates in the United States and internationally, including the Caribbean region, with a focus on rural and remote markets with a growing demand for infrastructure investments. The Company’s operating subsidiaries today primarily provide: (i) advanced wireless and wireline connectivity to residential, business, and government customers, including a range of high-speed Internet and data services, fixed and mobile wireless solutions, and video and voice services; and (ii) carrier and enterprise communications services, such as terrestrial and submarine fiber optic transport, and communications tower facilities. For more information, please visit www.atni.com.

Contact: Michele Satrowsky Corporate Treasurer ATN International Inc. 978-619-1300

Adam Rogers Investor Relations [e-mail]