[dns-operations] cmdns.dev.dns-oarc.net down?

[Lee]

On 9/4/23, Christoph   wrote:

> Hello!
>
> https://dnsviz.net/d/cmdns.dev.dns-oarc.net/dnssec/
>
> since cmdns.dev.dns-oarc.net appears to be down,
> what are other good websites that show end users their recursive resolver source IPs?

Since it's documented, there's less chance of it disappearing:
  https://www.akamai.com/blog/developers/introducing-new-whoami-tool-dns-resolver-information
dig TXT whoami.ds.akahelp.net. +short
dig TXT whoami.ipv4.akahelp.net +short
dig TXT whoami.ipv6.akahelp.net +short

The rest I've gotten from mailing lists .. and most no longer work.
The few I know of that still work are

dig txt +short  o-o.myaddr.l.google.com
  gives me the ipv6 address of the resolver
dig txt +short  o-o.myaddr.l.google.com @ns{1,2,3,4}.google.com
  gives me the ipv4 address

dig whoami.v4.powerdns.org +short
  I don't know of an ipv6 powerdns resolver though

I don't know what's up with ultradns.. it used to work
$ dig whoami.ultradns.net +short
255.255.255.255

Regards,
Lee