Whois and reverse dns lookup provided by robtex


DNS delegation of d.ext.nic.cz updated:


We pick h.root-servers.net, one of the 13 root servers (1), and ask it about d.ext.nic.cz and learn that cz is delegated to four name servers (2), so we ask b.ns.nic.cz and get the following answer:

Authoritative answer

ANSWER for d.ext.nic.cz.
d.ext.nic.cz.1800 A193.29.206.2 d.ext.nic.cz points to
1800RRSIG\# 90 00010d0400000708589286fc5881348bd141036e696302637a00b8dba2ffb24309cc574ef27fc0d73374443996766f03fdb318f47afeef78e376edd148a7b78989fe9db17c61ab9247e5571b2aa09f78dad42c614b5541d0cd8b
1800 AAAA2001:678:1::2 d.ext.nic.cz points to 2001:678:1::2.
1800RRSIG\# 90 001c0d04000007085892af1b5881348bd141036e696302637a0040d4cc5e99307867df8f887c957014ebb9997f979adb109dfbea927c93fb994cb501641129c4fd063543ad2c1bc0ea30b59315e54e9e42559e50a13dfbd73faa
AUTHORITATIVE for d.ext.nic.cz.
nic.cz.1800 NS b.ns.nic.cz. nic.cz use b.ns.nic.cz as name server.
1800 NS a.ns.nic.cz. nic.cz use a.ns.nic.cz as name server.
1800 NS d.ns.nic.cz. nic.cz use d.ns.nic.cz as name server.
ADDITIONAL for d.ext.nic.cz.
a.ns.nic.cz.1800 A194.0.12.1
b.ns.nic.cz.1800 A194.0.13.1
d.ns.nic.cz.1800 A193.29.206.1
a.ns.nic.cz.1800 AAAA2001:678:f::1
b.ns.nic.cz.1800 AAAA2001:678:10::1
d.ns.nic.cz.1800 AAAA2001:678:1::1

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