This is a personel list maintained by Leadmon.net. The list classifies IPs into 6 different types. These types are Dial-Up/Cable/DSL IP Addresses, Individual SPAM Sources, Bulk mailers, Single-Stage Open Relays, Multi-Stage Open Relays and finally SpamBlock Sites. It looks like it has stoped listing Dial-Up/Cable/DSL IP Addresses.
Is the information on our site wrong or incomplete? You don't want us to monitor your blacklist? Or do you operate a similar blacklist? We would like to hear from you!