The Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC as DUO Broadband Data Breach: Reported Filing Facts

Duo County Telephone Cooperative Corporation, Inc. and Cumberland Cellular, LLC, operating as DUO Broadband, is a telecommunications provider offering internet, telephone, and cellular services to its subscribers. As a utility-based service provider, the company typically collects and maintains sensitive customer information, including personally identifiable information, billing details, and service account records necessary for managing telecommunications infrastructure. In 2025, the company officially reported a data security incident to the New Hampshire Attorney General, indicating that unauthorized access to their systems occurred. If you received a data breach notification letter from DUO Broadband, it means that your personal information was likely involved in this incident. This letter serves as formal notice regarding the nature of the event and the specific data elements that may have been compromised.

State: New Hampshire
Reported: May 15, 2025

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

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