CERT DNS Off air?

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dig @192.88.209.21 cert.org SOA

; <<>> DiG 9.2.1 <<>> @192.88.209.21 cert.org SOA
;; global options: printcmd
;; connection timed out; no servers could be reached

Same for .5 their other DNS server .... traceroutes die at:
cert-i1.psc.net (192.88.115.90) 99.533 ms 100.103 ms 99.858 ms

Although from some other traceroute sites we can get one hop further if
the enter cert's network via cert-i2:
192.88.209.195 (192.88.209.195) 80.127 ms 79.990 ms 80.038 ms

Also, using other DNS search tools on the net reveals no answer ....

Mark
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Mark Vevers. mark@ifl.net / mark@vevers.net
Principal Internet Engineer, Internet for Learning,
Research Machines Plc. (AS5503)
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GPG Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xB08F3CA3
Fingerprint: 85BA 30C4 9EC8 1792 4C8C C31E 58B5 3D1C B08F 3CA3