A DUL or a Dial-Up-List is a DNS list that gives an A record (usually in the 127.0.0.0/24 range) for IPs that’s dynamically assigned, such as dial-up users, or various DSL services. Basically, any technology where an IP is not assigned to a specific person (3G, iBurst, ADSL, sentech, dial-ups).
What the question is now, is whether it’s possible to build such a DUL based on the information provided in whois. (more…)