Convenient public IPv6 test addresses

Question

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?

It should be noted that pinging an arbitrary service on the Internet that you don't control is a crappy connectivity test. — MDMarra, Jun 06 '13 at 22:37
It's an excellent positive test, but not really a good negative test. — MikeyB, Jun 07 '13 at 02:09

score 25 · Accepted Answer · answered Jun 06 '13 at 22:53

25

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

answered Jun 06 '13 at 22:53

Gerald Combs

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Doesn't respond to UDP traceroute. – Michael Hampton Jun 06 '13 at 22:55
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`64 bytes from 2600::: icmp_seq=1 ttl=52 time=207 ms` - works – Vi. Jun 06 '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 06 '13 at 23:11
@MichaelHampton It does now. – kasperd Oct 03 '16 at 17:03

score 11 · Answer 2 · answered Jun 06 '13 at 22:35

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.

answered Jun 06 '13 at 22:35

MikeyB

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Works, but I would prefer them to be like `2001::8888` or even `2001::2001` – Vi. Jun 06 '13 at 22:37
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Strangely enough, [these are the IP addresses for Google Public DNS](https://developers.google.com/speed/public-dns/docs/using). – Michael Hampton Jun 06 '13 at 22:39
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Not so strangely… that's where I got them from :) – MikeyB Jun 07 '13 at 02:08
@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 '14 at 20:11

score 2 · Answer 3 · answered May 15 '20 at 19:09

example.com, example.net, and example.org are reserved domains for documentation purposes. However, they also resolve to a running HTTP server and can be opened in browser and this server also response to ping:

# ping -c1 example.net
PING example.net (93.184.216.34): 56 data bytes
...

# ping6 -c1 example.net
PING6(56=40+8+8 bytes) .... --> 2606:2800:220:1:248:1893:25c8:1946
...

The IP addresses are hard to remember, yet the domain names are easy, so if you have DNS...

Alternatively you can use the DNS servers of Quad9:
(great alternative to Google's DNS; better privacy and malware filtering)

# ping 9.9.9.9
# ping6 2620:fe::fe

Convenient public IPv6 test addresses

3 Answers3