Microsoft sites topped the list as the most visited global property in June 2006 with approximately 500 million global visitors, according to comScore Networks World Metrix report, which estimates global online audience size.

Yahoo sites were second (481 million visitors), and Google sites (454 million visitors) were third. However, Yahoo sites led all global properties with 116 billion page views during June, followed by Google (84 billion page views), and Microsoft sites (75 billion page views).

"The 'big three' properties continue to aggregate the largest worldwide audiences, dominating the rankings," said Bob Ivins, managing director for comScore Europe. "While the established Internet players grabbed the top spots in the worldwide rankings, several upstarts have quickly found their way into the top 15 properties. Wikipedia sites ranked 8th on a worldwide basis in June with 128 million visitors, while MySpace ranked 15th with 66 million visitors worldwide," he said.

comScore data also revealed that 713 million people, age 15 or older, used the web around the world from all locations in June. Visitors from the U.S. accounted for 21 percent of all worldwide unique visitors, 11 percent originated from China, and 7 percent originated from Japan.