Bare TLD resolutions

Jay Ashworth jra at
Wed Sep 17 20:57:52 UTC 2014

----- Original Message -----
> From: "John Levine" <johnl at>

> >The latter would seem to be avoidable by making sure that *DNS resolution
> >of bare TLDs always returns NXDOMAIN*.
> >
> >Is that a requirement for a TLD?
> No. In fact, a TLD lookup that returned NXDOMAIN would be utterly
> broken since that would mean the TLD had no SOA, no NS, and no
> subdomains. Perhaps you're confusing it with NOERROR.

No, I was confusing you for someone who understood -- as everyone else
here seems to have -- that I meant "querying for an A, AAAA, or MX 

> >If it isn't, does anyone know of any domains dumb enough to actual
> >return something for a lookup on the bare TLD?
> Yes. If you'd read RFC 7085, you'd already know which ones do.
> There have been A and MX records at TLDs nearly as long as there have
> been TLDs.

And this is *why* I assumed you knew that, since the RFC is yours, and
makes precisely that distinction.

-- jra
Jay R. Ashworth                  Baylink                       jra at
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates          2000 Land Rover DII
St Petersburg FL USA      BCP38: Ask For It By Name!           +1 727 647 1274

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