Domain registrar and Web hosting company GoDaddy is down, perhaps taking millions of Web sites down with it, the company acknowledged. A tweet from GoDaddy said, \"Status Alert: Hey, all. We\'re aware of the trouble people are having with our site. We\'re working on it,\" and a voice message on the company\'s customer service line also acknowledged the outage, CBS news reported. \"If you are having a problem with your e-mail, we are aware of the problem,\" the message said. Tweets from Twitter accounts claiming to be associated with the hacking group Anonymous took responsibility for the attack. \"By using/supporting Godaddy, you are supporting censorship of the Internet,\" a tweet from @AnonOpsLegion said. GoDaddy has been the target of protests for supporting the controversial Stop Online Piracy Actand Protect IP Act.