On Tue, 30 Apr 1996, Perry E. Metzger wrote:

> > I certainly want to find out who the hell 223.255.254.254 is if they're
> > trying to log on to my machine!
> 
> Thats not an inverse query. Thats a forward query for the PTR record
> for 254.254.255.223.in-addr.arpa.

Yep.  The true inverse query is a lot like playing Jeopardy - you give 
the name server an answer and ask it to tell you the right question!  So, 
you tell the server "I have an address 254.254.255.223" and the server 
comes back with "What is the address for <host>?"