How to verify if your system is capable of IPv6 connectivity

There will be no more Internet Protocol version 4 (IPv4) addresses by the end of 2011 due to IP address space exhaustion.  Because of this, Internet traffic will be using the next-generation Internet Protocol version 6 (IPv6) addresses.  A number of prominent websites will be participating in World IPv6 Day and will be offering their content using IPv6 in addition to IPv4.  There are websites, however, that may be supporting IPv6 only.  If your system is not ready for IPv6 transition, you will not be able to access those sites.

IMPORTANT:  An IPv4-only computer can connect to IPv6 and IPv4-capable sites.  However, when a site is IPv6 capable, networks that can speak IPv6 will prioritize connecting with IPv6 to reach those sites.

This article will guide you on how to test whether your system (computer, router and Internet Service Provider/ISP) is capable of IPv6 connectivity.  To learn how, follow the steps below:

Step 1:
Launch a web browser.

Step 2:
On the Address bar, enter “” and press [Enter].


You will then see a window informing you that the test for your computer’s IPv6 connectivity is starting.


Once the test finishes, you will be able to see whether your computer is IPv6-capable or not.

A typical success screen looks like this:


If you get the message No Problems are anticipated for you, your computer’s IPv6 connectivity is likely problem-free.  

A typical failure screen looks like this:


If you get the message You are expected to have problems connecting to this day, some IPv6 diagnostics will be needed to ensure you have no problems on World IPv6 Day. 

Related Articles:

Differences between IPv4 and IPv6
Preferring IPv4 over IPv6
Checking the computer's IPv6 Address
Linksys devices that support IPv6
Encountering the error message “Unable to access dual-stacked content.”

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