[dns-operations] Missing reverse for e.root-servers.net IP address?

sthaug at nethelp.no sthaug at nethelp.no
Mon Jul 23 09:40:54 UTC 2012

I can't lookup the PTR for e.root-servers.net ( This
server is located at NASA, as far as I can see, and is supposed to be
served by ns{1,2,3}.nasa.gov according to for instance x.arin.net:

230.203.192.in-addr.arpa. 86400 IN      NS      ns3.nasa.gov.
230.203.192.in-addr.arpa. 86400 IN      NS      ns1.nasa.gov.
230.203.192.in-addr.arpa. 86400 IN      NS      ns2.nasa.gov.

The nasa.gov name servers are at:

nasa.gov.               300     IN      NS      NS3.nasa.gov.
nasa.gov.               300     IN      NS      NS2.nasa.gov.
nasa.gov.               300     IN      NS      NS1.nasa.gov.

NS1.nasa.gov.           300     IN      A
NS1.nasa.gov.           300     IN      AAAA    2001:4d0:8300:401::189
NS3.nasa.gov.           300     IN      A
NS3.nasa.gov.           300     IN      AAAA    2001:4d0:6300:401::181
NS2.nasa.gov.           300     IN      A
NS2.nasa.gov.           300     IN      AAAA    2001:4d0:2300:401::185

Trying PTR queries for against the IPv4
addresses for ns{1,2,3}.nasa.gov, I get REFUSED from all of them. I
can't even reach the servers at the IPv6 addresses (no reply at all).

Anybody else seeing the same?

Steinar Haug, AS 2116

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