by Roger Yu, USA TODAY
GoDaddy, a Web-hosting and domain-registration company, said services have been restored for most of its customers after widespread outages on Monday.
"At no time was any sensitive customer information, such as credit card data, passwords or names and addresses, compromised," the company said in an announcement on its website.
The outages of hosted sites started around 1 p.m. ET on Monday, but GoDaddy was still in operation then. But by late afternoon, the company closed its website.
Twitter accounts believed associated with hacking group Anonymous claimed responsibility, but its involvement wasn't confirmed.
GoDaddy, which hosts more than 5 million sites, has been a subject of hackers' ire because it publicly supported federal anti-piracy legislation called the Stop Online Piracy Act, or SOPA.
Several prominent opponents of the measure argued that the bill would stifle innovation and removed their domains from GoDaddy. "By using/supporting GoDaddy, you are supporting censorship of the Internet," read a message posted Monday by a Twitter account believed to be affiliated with Anonymous.
Kenneth Borg, who works in a Long Beach screen-printing business, told the Associated Press on Monday that FresnoDogPrints.com and two other sites were down. "We run our entire business through websites and e-mails, so everything's down today," Borg said.
"I'm definitely one for upsetting the establishment in some cases, and I understand that if (the hacker is) going after GoDaddy, he may have had many reasons for doing that," Borg said. "But I don't think he realized that he was affecting so many small businesses."
Contributing: Julia Ryan; The Associated Press