Information about the Urchin DNS database update.
Urchin gets the domain db from a third-party source and update it as frequently as possible. the Urchin scheduler will run monthly and update the database at that time.
You can also create a custom mapping of IP addresses within Urchin. If you know how you want to map the unresolved IPs (e.g. they know a certain netblock belongs to a particular domain), you can add that information to the domain.local file and run the geodata utility to import it into the geodata databases.
Additionally, if you would like to provide the IP addresses that are not resolving (preferably with correct geographical information), we can forward that to the third-party source for inclusion in the geo-update data.