An outage affecting web hosting giant Amazon Web Services (AWS) has taken out vast swathes of the web, including websites, banks and some government services.

Amazon said on Monday morning that the outage had been “fully mitigated” and that most services are returning to normal after an hours-long stretch during which much of the internet could not load.

The internet giant blamed the outage, which began around 3 a.m. on the U.S. east coast, on DNS, a system that converts web addresses into IP addresses so that customer apps and websites can load.

While some glitches can resolve quickly, DNS issues can sometimes take longer to resolve.

Several major apps were not working. Coinbase , Fortnite , Signal and Zoom faced lengthy outages, as did Amazon’s own services , including its

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