Over 45,000 users affected as CenturyLink, Quantum Fiber, Brightspeed internet services go down across multiple US networks

A widespread broadband outage on Thursday, June 19, disrupted internet services across multiple US states. Internet users relying on CenturyLink, Quantum Fiber, Brightspeed, and other regional providers reported problems with connectivity, slow speeds, and intermittent drops. The issue was reported widely by users through the website Down Detector.

These reports came from across the US, suggesting the issue was widespread. CenturyLink and Quantum Fiber had the most severe disruptions.

Outage tracking visuals showed over 35,000 CenturyLink users experiencing service issues. Quantum Fiber had more than 17,000 users reporting outages. Brightspeed also saw over 3,000 reports during the same time.


CenturyLink (Lumen Technologies) continues to manage fiber and legacy copper services, including Quantum Fiber. Brightspeed now serves 20 states formerly under Lumen’s footprint.

FAQs

What exactly is CenturyLink?

CenturyLink is an American telecommunications company offering communications, network, security, cloud, and managed services through fiber and copper networks.

Who is CenturyLink owned by?

CenturyLink is owned by Lumen Technologies, which acquired CenturyLink and rebranded the company as Lumen in 2020.

What is CenturyLink called now?

The company stock ticker changed from CTL to LUMN effective with the opening of the trading day on September 18, 2020. CenturyLink will continue to be a customer-facing brand for traditional copper-based services.

Who owns Quantum Fiber?

Quantum Fiber is a fiber internet service brand originally owned by Lumen Technologies. However, as of May 2025, AT&T is acquiring approximately 95% of Lumen's Quantum Fiber business, including about one million subscribers and four million enablements, in a deal valued at $5.75 billion.