WASHINGTON -- U.S. officials announced plans Friday to relinquish federal government control over the administration of the Internet, a move that pleased international critics but alarmed some business leaders and others who rely on the smooth functioning of the Web.

Pressure to let go of the final vestiges of U.S. authority over the system of Web addresses and domain names that organize the Internet has been building for more than a decade and was supercharged by the backlash last year to revelations about National Security Agency surveillance.

The change would end the long-running contract between the Commerce Department and the Internet Corporation for Assigned Names and Numbers (ICANN), a California-based nonprofit group. That contract is set to expire next year but could be extended if the transition plan is not complete.

"We look forward to ICANN convening stakeholders across the global Internet community to craft an appropriate transition plan," Lawrence Strickling, assistant secretary of commerce for communications and information, said in a statement.

The announcement set off a passionate response.

Senate Commerce Committee Chairman John Rockefeller, D-W. Va., called the move "consistent with other efforts the U.S. and our allies are making to promote a free and open Internet, and to preserve and advance the current multi-stakeholder model of global Internet governance."

But former House speaker Newt Gingrich, R-Ga., tweeted, "What is the global Internet community that Obama wants to turn the Internet over to? This risks foreign dictatorships defining the Internet."

The practical consequences of the decision were harder to immediately discern, especially with the details of the transition not yet clear. Politically, the move could alleviate rising global concerns that the U.S. essentially controls the Web and takes advantage of its oversight role to help spy on the rest of the world.

U.S. officials set several conditions and an indeterminate timeline for the transition from federal government authority, saying that a new oversight system must be developed and win the trust of crucial stakeholders around the world. An international meeting to discuss the future of Internet is scheduled to start on March 23 in Singapore.