[dns-operations] Looking for a public blackhole/sinkhole IP address

Robert Edmonds edmonds at mycre.ws
Wed Nov 26 17:20:44 UTC 2014

Stephane Bortzmeyer wrote:
> I was thinking of non-routed addresses like or
> but it's not their normal use. AFAIK, there are no
> "public sinkholes" IPv4 addresses. For IPv6, there is 100::/64 but it
> is only internal, there is no public 100::/64 service.

There is some precedent for using TEST-NET addresses to shed DNS
queries.  RFC 6471 §3.4 suggests such a procedure when shutting down
DNSBLs, and there is at least one DNSBL that uses it (list.dsbl.org).

Robert Edmonds

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