What is IPv6, or Internet Protocol, version 6?

Find out whether your home network is ready for the web’s new Internet Protocol.


IPv6 stands for the Internet Protocol, version 6. It is a protocol that’s intended to replace the current version, IPv4. One of the main benefits of IPv6 versus IPv4 is that it provides a pool of nearly unlimited IP addresses. Other improvements include more efficient routing and stateless address auto-configuration. The transition to IPv6 is expected to take some time, so IPv4 and IPv6 will coexist with one another for years.

Please visit the IPv6 Help Center for more information about our content and services over IPv6.

The volume of Internet-enabled devices is growing rapidly. In early 2011, the Internet Assigned Numbers Authority (IANA) exhausted the global IPv4 free pool. Given this growth, it is important that adequate IP address resources are available to ensure that everyone can connect to the Internet. IPv4 will no longer be able to satisfy these needs, which is why the Internet community is adopting IPv6.

You can view your current IPv4 address at http://www.comcast6.net. When your area transitions to IPv6, you’ll be able to see your IPv6 address there).

To tell if your computer or home network is ready for IPv6, visit our special test website, and in less than a minute we’ll tell you if there are any ‘red’ items that you need to fix. (We'll be happy to walk you through what to do in order to resolve them).

Comcast's support of IPv6

A key aspect of Comcast’s IPv6 program is to make the company’s content available over IPv6. We will maintain support for IPv4 while adding support for IPv6. You will not need a new Comcast device when your area makes the switch to IPv6. You only need a new device for your XFINITY Internet if we determine the current device is malfunctioning, or if you want to upgrade to a higher level of speed than your current device is capable of.

WiFi is IPv6 is compatible, however, it may require an upgrade to your gateway firmware or hardware. If you have a wireless gateway (Ethernet to WiFi bridge) connected to an XFINITY Internet gateway to achieve wireless capability, the gateway may need to be replaced with one that is IPv6 capable.

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