Many A-records

[Jonathan de Boyne Pollard]

f> IP management tools like Lucent QIP for example is built up 
f> around that every IP only have one A-record [...]

Then, if true, those tools are severely limited and unsuitable for real world
use.

The mapping from domain names to IP addresses via "A" and "AAAA" resource
record sets is M-to-N.  Any tool that imposes the constraint that it be 1-to-1
is unduly restrictive and unsuitable for general use.