It's always good practice to anonymize data. Registrar identity seems ok to me. Nicolas On 17/11/2011 10:58 AM, Marc Perkel wrote: > Just a general question about whois data. I'm thinking about starting > a project to slowly mine the WHOIS database and publish the data > through high speed DNS for the purpose of using it for spam filtering. > Mostly interested in associating domain name with their registrar and > returning information on the age of the domain. > > Is there anything improper or illegal about doing this?