[dns-operations] Google Public DNS

[Stephane Bortzmeyer]

On Thu, Nov 15, 2012 at 04:00:03PM +0100,
 Stefan Schmidt <zaphodb at zaphods.net> wrote 
 a message of 77 lines which said:

> Also it should be easy to write something up that returns the
> recursive Server IP that queried for a certain qname as a TXT record
> or even automatically the matches from that list.

No need to write it, it already exists:

% dig +short @8.8.8.8 A self.myresolver.info  
74.125.181.26

See <http://myresolver.info/about>

You can also creatively reuse porttest 
<https://www.dns-oarc.net/oarc/services/porttest> for that:

% dig @8.8.8.8 +short porttest.dns-oarc.net TXT
porttest.y.x.w.v.u.t.s.r.q.p.o.n.m.l.k.j.i.h.g.f.e.d.c.b.a.pt.dns-oarc.net.
"74.125.181.20 is UNKNOWN: Only received 1 queries.  Please try again in 60 seconds"