RFC 1918 response

[Chris]

The entire log line reads:
localhost named[4436]: client 127.0.0.1#33109: RFC 1918 response from Internet 
for 2.2.168.192.in-addr.arpa

I looked through RFC 1918 and believe I have a bit of a grasp on its meaning 
and also looked through the bind users archives but couldn't find anything 
close to the above. Is this an error, a warning or just a bit of information?

Apologies for the dumb question if this is in fact one.

Chris

-- 
Chris
KeyID 0xE372A7DA98E6705C