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Are there any convenient public, globally routable test addresses for IPv6?

Similar to how 8.8.8.8 and 8.8.4.4 tend to get used this way for IPv4?

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It should be noted that pinging an arbitrary service on the Internet that you don't control is a crappy connectivity test. –  MDMarra Jun 6 '13 at 22:37
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It's an excellent positive test, but not really a good negative test. –  MikeyB Jun 7 '13 at 2:09

2 Answers 2

up vote 18 down vote accepted

The shortest I've seen is www.sprint.net (2600::).

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Doesn't respond to UDP traceroute. –  Michael Hampton Jun 6 '13 at 22:55
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64 bytes from 2600::: icmp_seq=1 ttl=52 time=207 ms - works –  Vi. Jun 6 '13 at 22:55
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@Michael Lots of things don't respond to UDP traceroute these days. I tend to match the trace to the protocol in question (e.g. nmap --traceroute or tcptraceroute to port 80 for web servers.) –  Gerald Combs Jun 6 '13 at 23:11

Handily enough, 2001:4860:4860::8888 and 2001:4860:4860::8844 are the IPv6 equivalents of 8.8.8.8 and 8.8.4.4!

That's fairly easy to remember.

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Works, but I would prefer them to be like 2001::8888 or even 2001::2001 –  Vi. Jun 6 '13 at 22:37
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Strangely enough, these are the IP addresses for Google Public DNS. –  Michael Hampton Jun 6 '13 at 22:39
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Not so strangely… that's where I got them from :) –  MikeyB Jun 7 '13 at 2:08
    
@Vi. That wouldn't work. 2001::/32 is reserved to Teredo. Both of your suggestions would be using a Teredo server on the IPv4 address 0.0.0.0. But 0.0.0.0 wouldn't be a valid address for a Teredo server. –  kasperd Dec 14 at 20:11

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