Facebook served a trillion pageviews during the month of June, according to Google, which released data yesterday apparently confirming Facebook's reach.

Facebook served a trillion pageviews during the month of June, according to Google, which released data yesterday apparently confirming Facebook's reach.

Google's DoubleClick Ad Planner lists Facebook.com as serving 1 trillion page views to 870 million unique visitors for the month of June. DoubleClick is Google's ad management and ad serving technology foundation for its network of partners.

In terms of users, the top five sites are Facebook, YouTube, Yahoo, Microsoft's Live.com, and Wikipedia.org. In terms of users, the list proceeds: Facebook, Baidu.com, YouTube, Yahoo, and Live.com.

If the data is right, the information provides some fascinating insight into the true reach of global sites around the globe. For example, in terms of page views, Google measures YouTube as serving 100 billion page views for the month. (The estimates appear to be rounded to two significant digits.)

Above that, however, lies Baidu.com, with 120 billion page views for the month. And on the list is vkontakte.ru, which serves up 52 billion page views per month even though it attracts just 38 million unique visitors. Google's other social networking site, Orkut.com.br, also serves 48 billion page views per month, against 61 million uniques. Even Yahoo.co.jp is listed at 32 billion page views, and 82 million uniques.

Facebook hasn't publicly confirmed the higher user number, although the company has scheduled , where company executives may confirm the number. To date, Facebook has only confirmed that it has 750 million users.

CEO Mark Zuckerberg said in July that the company didn't publicize the milestone because user numbers are not as important as they once were. "The reason why we didn't report it is we don't think it's the metric to watch right now," Zuckerberg said during a press event that saw the unveiling of Facebook video calls with Skype and a revamp of the its other chat features.