WikiLeaks was forced Friday to switch over to a Swiss domain name, wikileaks.ch, after a new round of hacker attacks on its system prompted its American domain name provider to withdraw service.

WikiLeaks' U.S. domain name system provider, EveryDNS, withdrew service to the wikileaks.org name late Thursday, saying it took the action because the new hacker attacks threatened the rest of its network. "Wikileaks.org has become the target of multiple distributed denial of service attacks. These attacks have, and future attacks would, threaten the stability of the EveryDNS.net infrastructure," EveryDNS, headquartered in Manchester, New Hampshire, said .

EveryDNS.net provides access to some 500,000 websites. In a tweet on Friday, the owner of EveryDNS, Dynamic Network Services Inc., wrote that "trust is paramount: Our users and customers are our most important asset." It did not specify whether it was referring to WikiLeaks, however.

WikiLeaks confirmed the move in a separate tweet, saying "WikiLeaks.org domain killed by US everydns.net after claimed mass attacks." It was not clear where the alleged attacks were coming from.

WikiLeaks' new domain, wikileaks.ch, is owned by the Swiss Pirate Party, a political group formed two years ago to campaign for freedom of information and sensible technology policy.

On Wednesday, Amazon.com Inc. - which had provided WikiLeaks with use of its servers to distribute embarrassing State Department communications and other documents - evicted it. The site remains on the servers of its Swedish provider.