Comcast Achieves World IPv6 Launch Milestone

When Comcast decided to participate in World IPv6 Launch, we committed to enabling at least 1% of our customers with IPv6 by June 6, 2012. We are happy to report that we achieved this goal a few days ago, on May 24, 2012, and the number of customers enabled with IPv6 continues to grow every day! See the details on our blog.

World IPv6 Launch on June 5-6: Launch Into the Future

The World IPv6 Lauch is almost upon us! It begins on the East Coast of the United States on the evening of June 5, 2012 (at midnight UTC on June 6). For all the details, see the special event website setup by the Internet Society at

IPv6 Offers Many More IP Addresses

If you have a home gateway device, we'll issue you much more than the single IPv4 address you get today. In fact, you will get what is called a /64 -- which is 18,446,744,073,709,551,616. That's 18 quintillion unique IPv6 addresses! So we're happy to provide you with a plentiful supply of addresses. Welcome to IPv6. :-)

If You Own Your Modem, Consider a New One That Supports IPv6

If you have purchased your own device, and it does not support DOCSIS 3.0, we of course always recommend that you upgrade to a DOCSIS 3.0 device to take advantage of all the speed possible in our network. You can certainly contact us and we will be happy to lease you a DOCSIS 3.0 device. If you'd like to buy your own device, you can find a list of approved devices at MyDeviceInfo. On that list you will see a checkmark next to the devices that support IPv6, which is a factor you may want to consider when you select a new device.

Get Your Home Network Ready for IPv6

You can find helpful directions on configuring your home gateway device (such as an Apple Airport Extreme) on MyDeviceInfo. It is significant and notable that, up to now, IP addressing (with IPv4) has been shared. That means a typical Internet user has used Network Address Translation (NAT) to share a single IP address across multiple devices in the home. That all changes with IPv6 - which means the need for NAT and shared addressing goes away. We hope this change will unleash new innovation in home networking and other in-home Internet services.

World IPv6 Launch is Coming Soon

World IPv6 Launch starts the evening of June 5, 2012, in the United States. 

IPv6. A modest upgrade.

New Firmware for NetGear CMD31T Device Released

NetGear and Comcast have completed emergency testing, certification, and field soak with their new firmware that resolved the previous IPv6 defect. This new firmware should now be running on all CMD31T devices operating in our network. In addition, NetGear has updated their existing unsold devices, some of which are now available at Walmart stores around the country. We appreciate NetGear's close cooperation to bring this to closure.

IPv6 Deployment Expands to Support Home Gateway Devices

This first phase of our IPv6 deployment, started in 2011, supports directly connected CPE, where a single computer is directly connected to a cable device. We have now entered a major new phase, which supports home gateway devices (a.k.a. home routers). To learn more, check out FAQs on the pilot market deployment and the announcement and technical details on our blog.