zlacker

I'm not seeing a block at the moment. I did find a whois history page that claims their NS records in January, 2018 are the same as what I'm seeing now:

    ns1.vtitan.com
    pdns90.ultradns.net
    pdns90.ultradns.com
    dns1.p03.nsone.net
    dns2.p03.nsone.net
    nds3.p03.nsone.net

Those don't appear to be connected to the registrar (tierra.net); most likely the NS records were removed or replaced with servers that direct all queries to a parking page for abusive domains. The TLD servers for com. return a 2 day TTL for all glue records, and their SOA record indicates a 1 day negative TTL.

(Of course, some caching resolvers ignore TTLs :( )