OK - tell me if this is useful. I created a DNS list that you can pass a
host name to and get information as to where the registrar barrier is.

You can use it as follows:

dig .rb.junkemailfilter.com

Example:
dig perkel.com.rb.junkemailfilter.com - returns 127.0.0.1
dig perkel.co.uk.rb.junkemailfilter.com - returns 127.0.0.2

If it's a single level domain it will return 127.0.0.1
Two level domains return 127.0.0.2
Three level domains return 127.0.0.3

I'm using it for some statistical stuff but I'm wondering if anyone else
finds this useful. Thinking about using it to forward spam to
abuse@ to report spam.