An outage at GoDaddy.com, a company that hosts websites and registers domain names, caused hundreds of thousands, possibly even millions, of websites to crash.
"Status Alert: Hey, all. We're aware of the trouble people are having with our site. We're working on it," GoDadday said on Twitter.
A hacker claimed responsibility via Twitter, but it is not clear if the claim is genuine.
GoDaddy said it was "working feverishly to resolve as soon as possible."
Hours later, the company tweeted: "Most customer hosted sites back online. We're working out the last few kinks for our site & control centers. No customer data compromised."
By around 5:43 p.m. EDT Monday, GoDaddy.com was back up and service was restored for the bulk of its customers, reported the Associated Press.
GoDaddy.com is known for its provocative TV commercials that have aired during the Super Bowl.