So I was playing with nslookup on some bogus addresses, for a script.
and I ended up getting some unexpected behavior.

nslookup $IP
Lookup failedServer: A_vaild_address*
Address: A_vaild_address

** server can't find NXDOMAIN

The IP used in the NXDOMAIN field is backwards. Is this the normal convention for looking up domain names from IP's?

*same results on different DNS servers