The problems that RFC 2317-style delegation cause

[Jonathan de Boyne Pollard]

l> In testing this [...]

... you've re-discovered that RFC 2317-style delegation breaks the 
features of many DNS softwares, including the convenience feature of 
"dig" that you are using here that allows one to perform reverse lookups 
easily without manually converting the IP address to the equivalent 
"in-addr.arpa." reverse lookup domain name.

<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/avoid-rfc-2317-delegation.html>