Comcast has successfully activated our first group of trial users for IPv6 Native Dual Stack operation. These are the first Native Dual-Stack users activated in a production DOCSIS network in North America. Leveraging our state-of-the-art, production DOCSIS 3.0 network, these users can now access content and services natively over both IPv6 and IPv4. This means users do not need to use any IPv6 or IPv4 tunneling, translating, or NAT solutions; they can access IPv6 and IPv4 directly at high-speed, in an unencumbered fashion. This is a tremendous milestone for Comcast, cable operators, and the Internet community at large, and it is a critical milestone in our many years of work to prepare IPv6 to work seamlessly in a residential broadband Internet network. Each user has been delegated a /64 block of approximately 18,446,744,073,709,551,616 (18 quintillion) unique IPv6 addresses. We anticipate expanding our IPv6 Native Dual Stack trial in Colorado and in other areas in the coming weeks and months.
More: http://blog.comcast.com/2011/01/comcast-activates-first-users-with-ipv6-native-dual-stack-over-docsis.html