Thanks for reporting the failure of the dns blacklist services. Also I noticed the malfunctioning of the service as it kept still blacklisting me on any IP.
The reason is quite easy, as described on here:
On this means the ahbl dns blacklist service will be shutdown for the public and maybe remains back as a private service. If we hook on that train I am not quite sure about.I expect that over the next few days (Sat. at the latest) I'll be clearing out the three main zones of data, and removing their NS records shortly after.
I'm planning Jan 1st, 2015 to wildcard the DNSbl zones for anyone that doesn't bother to maintain their mail services.
The website isn't going anywhere, neither is any of our docs and things like the kook mail.
We do have some private services that will keep running - and I'm likely going to be offering invitations to our private DNSbl list at some point in the near future.
There is a good chance that I'll be reopening the RHSbl under a new name down the line as well.
For now the service runs without ahbl.