1. Users

The United States has more IPv6 users than any other nation in the world. There are 4,193,587 IPv6 users in the U.S. as of Sept. 19, according to . This compares to 3,717,564 IPv6 users in China and 2,411,587 IPv6 users in Japan. Romania, France and Luxembourg have a higher ratio of Internet users with IPv6 enabled, but the U.S. retains the lead in the total number of IPv6 users.

2. Content

U.S. Websites that drive the most page views are also the leaders in IPv6 deployment. Of the 10 most popular Websites on the Internet, five . All five of these Websites - Google, Facebook, YouTube, Yahoo and Wikipedia - are run by U.S. companies. Overall, the U.S. generated 13% -- or 399 -- of the 2,999 Websites that participated in the Internet Society's World IPv6 Launch Day in June.

3. Carriers