ip addresses

[Adam Rose]

What would be the best way to go about logging static ip addresses in the
user interface?  Our company likes to charge for static ip addresses and I
am trying to find a way of making them a package for each individual ip
and blocks of ip address space.  

The idea of making them a package was for billing purposes and tracking
available/unavailable ip addresses.  I am open to any suggestions.

Thank you,

-Adam