Some of the sites hit by a widespread internet outage Thursday morning, as shown by the spike in reports as indicated by the red lines on Downdetector.com.

An internet outage hit some of the largest online sites in the United States, according to reports tracked by outage monitoring site Downdetector.com.

Those impacted include Seattle-based companies such as Amazon, Valve’s Steam game platform, Microsoft, Expedia and Costco, among many other national brands and sites.

There are initial reports that the outage was related to issues at a major content delivery network, Akamai, which posted at 9:47 a.m. Pacific that it had identified and resolved the issue.

Although it may have been (thankfully) short-lived, the widespread nature of the outage shows how much of the internet is still subject to single points of failure.

Update: Akamai said its issue was not related to a cyberattack.

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