GoDaddy, the world's largest domain registrar and a top web host, is down due to a DNS attack. All of the sites that rely on GoDaddy as a host (even just for nameservers) have also been affected. On Twitter, a member of anarchist hacker collective Anonymous has claimed responsibility of the attack, while GoDaddy has said it's working to restore service as quickly as possible.
"Status Alert: Hey, all. We're aware of the trouble people are having with our site. We're working on it."
The attack appears to be in response to GoDaddy's support earlier this year of anti-piracy legislation SOPA and PIPA, which many Internet activists decried as a form of censorship.
"By using / supporting Godaddy, you are supporting censorship of the Internet," wrote an Anonymous Twitter account shortly after the attack.