Suggestion for unallocated IP-Space

Hello Routing-WG, since it's more and more difficult to determine, which IP-space is used correctly in the Routing table, is there any chance to setup an easy-retrievable page (say via HTTP or FTP) to view current unallocated IP-space. We all know martians such as: RFC-1918-space, default, localhost and Multicast Space. But it's very hard to filter correctly on address- space that's currently handed out by the RIRs. If there could be a database run - say in a weekly interval - which could generate the 'empty' space blocks in a list - which could again used to filter against. Any supports for this idea? Regards, Kurt -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net