On Thu, Feb 07, 2008 at 09:24:46AM -0000, Rogan, Julian <Julian.Rogan at unilever.com> wrote a message of 13 lines which said: > Can anyone explain what I am seeing here? Welcome to RFC 2317 "Classless IN-ADDR.ARPA delegation" http://tools.ietf.org/html/rfc2317