Sites that points their A Record to localhost

[Bill Owens]

On Tue, Jan 14, 2014 at 07:55:44PM -0500, Kevin Darcy wrote:
> If the domain owner *really* feels that they have to publish *some*
> address record for a particular name, but there is no available
> service at that name, then the null or "unspecified" address (IPv4 =
> 0.0.0.0, IPv6 = ::0) is the appropriate value to put there.
> 
> Loopback is anti-social; an apparent attempt to make the client
> waste resources connecting to itself. In legal terms, one might call
> this an "attractive nuisance".

You're quite right; that's why I have MX records for decades-old dead hostnames pointing to loopback, because the only queries for those names are from spammers and I'd very much like them to waste their time. But that's about the only reason I can think of to use it. . .

Bill.