With all the talk about IPv4 address scarcity, and the resulting migration to IPv6, I thought it'd be interesting to see how the IP space was chopped up. Additionally, I figured it'd be interesting to see what organizations were responsible for various network blocks. So, I've started enumerating the whois space and am tracking that information. I plan to make the results of this categorization available to the public, since whois is public anyway, despite various NIC's attempts to claim the data contained therein as proprietary.
<p>The end result of this effort will be a SHODAN-esque interface to WHOIS that allows interested folks to access the information without having to deal with pesky NIC formatting differences and hunting down referrals. A potentially useful side effect for pen testing is that one could query an organization's name and return a complete list of netblocks associated with that entity. There's likely a whole lot of other useful graphing and analysis that could be done with this, but I'm just working on getting the data populated and stored for the moment.</p> <p>To my knowledge, such a thing does not currently exist in a central location, and a format that's dynamically queryable by the public. The closest thing to this I'm aware of is robtex, which doesn't permit mass lookup of IP space based on org name/description, and requires lookups to be per netblock/domain (as opposed to permitting a dump en masse of the entire ip address space).</p>