Content delivery network (CDN) and Internet services business Cloudflare suffered a global outage today, lasting more than three hours.

The company said that a "spike in unusual traffic" was behind the widespread issues, but added it was yet to understand what the root cause of that traffic was.

Cloudflare's outage took down a number of services, including ChatGPT, X, Bet365, Grindr, and League of Legends.

DCD and sister site SDxCentral were also, regrettably, brought offline.

Around 20 percent of websites globally are thought to use Cloudflare services in some form.

“We saw a spike in unusual traffic to one of Cloudflare’s services beginning at 11.20am. That caused some traffic passing through Cloudflare’s network to experience errors. While most traffic for most services continued to flow as normal, there were elevated errors across multiple Cloudflare services," Cloudflare said in a statement.

“We do not yet know the cause of the spike in unusual traffic. We are all hands on deck to make sure all traffic is served without errors. After that, we will turn our attention to investigating the cause of the unusual spike in traffic.”

Services are believed to have fully resumed, but some customers may still experience issues logging into or using the Cloudflare dashboard.