Authoritative DNS server for 12.54.94.0/23 PTR

Dave Hart davehart at gmail.com
Tue Sep 27 21:06:56 CDT 2011


On Tue, Sep 27, 2011 at 20:06 UTC, Keegan Holley wrote:
> it looks like ATT still answers the queries.

Actually those two /24s are delegated to siemensmedical.com
nameservers.  Your query typo'd the third octet:

; <<>> DiG 9.8.0-P4 <<>> +trace -x 12.54.94.1
;; global options: +cmd
.                       492919  IN      NS      h.root-servers.net.
.                       492919  IN      NS      l.root-servers.net.
.                       492919  IN      NS      a.root-servers.net.
.                       492919  IN      NS      k.root-servers.net.
.                       492919  IN      NS      j.root-servers.net.
.                       492919  IN      NS      e.root-servers.net.
.                       492919  IN      NS      d.root-servers.net.
.                       492919  IN      NS      c.root-servers.net.
.                       492919  IN      NS      g.root-servers.net.
.                       492919  IN      NS      b.root-servers.net.
.                       492919  IN      NS      f.root-servers.net.
.                       492919  IN      NS      m.root-servers.net.
.                       492919  IN      NS      i.root-servers.net.
;; Received 449 bytes from 64.13.115.12#53(64.13.115.12) in 179 ms

in-addr.arpa.           172800  IN      NS      b.in-addr-servers.arpa.
in-addr.arpa.           172800  IN      NS      e.in-addr-servers.arpa.
in-addr.arpa.           172800  IN      NS      d.in-addr-servers.arpa.
in-addr.arpa.           172800  IN      NS      c.in-addr-servers.arpa.
in-addr.arpa.           172800  IN      NS      f.in-addr-servers.arpa.
in-addr.arpa.           172800  IN      NS      a.in-addr-servers.arpa.
;; Received 417 bytes from 192.228.79.201#53(b.root-servers.net) in 135 ms

12.in-addr.arpa.        86400   IN      NS      cbru.br.ns.els-gms.att.net.
12.in-addr.arpa.        86400   IN      NS      cmtu.mt.ns.els-gms.att.net.
12.in-addr.arpa.        86400   IN      NS      dbru.br.ns.els-gms.att.net.
12.in-addr.arpa.        86400   IN      NS      dmtu.mt.ns.els-gms.att.net.
;; Received 141 bytes from 2001:500:87::87#53(b.in-addr-servers.arpa) in 128 ms

94.54.12.in-addr.arpa.  172800  IN      NS      ns0.siemensmedical.com.
94.54.12.in-addr.arpa.  172800  IN      NS      ns.siemensmedical.com.
;; Received 94 bytes from
199.191.128.106#53(dbru.br.ns.els-gms.att.net) in 204 ms

;; connection timed out; no servers could be reached
And it appears the delegated nameservers are unresponsive.

Cheers,
Dave Hart



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