1. ccTLD/ie

dec.com からみで調査 ucd.ie

$ dnsq ns ucd.ie a.root-servers.net

2 ucd.ie:
413 bytes, 1+0+8+11 records, response, noerror
query: 2 ucd.ie
authority: ie 172800 NS a.iedr.ie
authority: ie 172800 NS b.iedr.ie
authority: ie 172800 NS c.iedr.ie
authority: ie 172800 NS d.iedr.ie
authority: ie 172800 NS ns3.ns.esat.net
authority: ie 172800 NS gns1.domainregistry.ie
authority: ie 172800 NS gns2.domainregistry.ie
authority: ie 172800 NS ns-ie.nic.fr
additional: a.iedr.ie 172800 A 77.72.72.44
additional: b.iedr.ie 172800 A 77.72.72.34
additional: c.iedr.ie 172800 A 194.146.106.98
additional: d.iedr.ie 172800 A 77.72.229.245
additional: ns3.ns.esat.net 172800 A 192.111.39.100
additional: gns1.domainregistry.ie 172800 A 198.133.199.102
additional: gns2.domainregistry.ie 172800 A 198.133.199.103
additional: ns-ie.nic.fr 172800 A 192.93.0.4
additional: a.iedr.ie 172800 AAAA 2a01:4b0::3
additional: b.iedr.ie 172800 AAAA 2a01:4b0::2
additional: ns3.ns.esat.net 172800 AAAA 2001:7c8:2:a::64

$ dnsq ns ucd.ie a.iedr.ie

2 ucd.ie:
271 bytes, 1+0+6+4 records, response, noerror
query: 2 ucd.ie
authority: ucd.ie 172800 NS scsnms.switch.ch
authority: ucd.ie 172800 NS sec-ns.tcd.ie
authority: ucd.ie 172800 NS auth-ns1.ucd.ie
authority: ucd.ie 172800 NS auth-ns2.ucd.ie
authority: ucd.ie 172800 NS uucp-gw-1.pa.dec.com
authority: ucd.ie 172800 NS uucp-gw-2.pa.dec.com
additional: auth-ns1.ucd.ie 172800 A 137.43.132.53
additional: auth-ns2.ucd.ie 172800 A 137.43.132.54
additional: auth-ns1.ucd.ie 172800 AAAA 2001:770:98:200::35:1
additional: auth-ns2.ucd.ie 172800 AAAA 2001:770:98:200::35:2