LONDON — A problem at Amazon’s cloud computing service disrupted internet use around the world early Monday, taking down dozens of online services, including social media site Snapchat, the Roblox and Fortnite video games and chat app Signal.

About three hours after the outage began, Amazon Web Services said it was starting to recover from the problem . AWS provides behind-the-scenes cloud computing infrastructure to some of the world’s biggest organizations. Its customers include government departments, universities and businesses, including The Associated Press.

Amazon pinned the outage on issues related to its domain name system, which converts web addresses into IP addresses so websites and apps can load on internet-connected devices.

On DownDetector, a website that tracks online

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