DNS/watch/cns13.sphere.ad.jpについて、ここに記述してください。
公開キャッシュサーバらしい。DNSSEC対応だとも。
$dnsname 203.138.63.115
cns13.sphere.ad.jp
$ dnsq a qmail.jp 203.138.63.115
1 qmail.jp: 174 bytes, 1+0+7+2 records, response, weird ra, noerror query: 1 qmail.jp authority: jp 25607 NS c.dns.jp authority: jp 25607 NS e.dns.jp authority: jp 25607 NS f.dns.jp authority: jp 25607 NS b.dns.jp authority: jp 25607 NS g.dns.jp authority: jp 25607 NS d.dns.jp authority: jp 25607 NS a.dns.jp additional: f.dns.jp 78097 A 150.100.2.3 additional: g.dns.jp 69165 A 203.119.40.1
[fg].dns.jp のAレコードはなんだ。 jp の参照も余計な気がするが。
%dnsq ns 7netshopping.jp 203.138.63.115
2 7netshopping.jp: 115 bytes, 1+0+4+0 records, response, weird ra, noerror query: 2 7netshopping.jp authority: 7netshopping.jp 80416 NS ns.necidc.net authority: 7netshopping.jp 80416 NS ns2.necidc.net authority: 7netshopping.jp 80416 NS ns3.necidc.net authority: 7netshopping.jp 80416 NS ns01.7netshopping.jp
%dnsq a ns.necidc.net 203.138.63.115
1 ns.necidc.net: 149 bytes, 1+0+5+2 records, response, weird ra, noerror query: 1 ns.necidc.net authority: necidc.net 86335 NS ns3.necidc.net authority: necidc.net 86335 NS ns2.necidc.net authority: necidc.net 86335 NS ns5.necidc.net authority: necidc.net 86335 NS ns4.necidc.net authority: necidc.net 86335 NS ns.necidc.net additional: ns4.necidc.net 52356 A 121.83.216.162 additional: ns5.necidc.net 52356 A 121.83.216.163
%dnsq a ns4.necidc.net 203.138.63.115
1 ns4.necidc.net: 149 bytes, 1+1+5+1 records, response, weird ra, noerror query: 1 ns4.necidc.net answer: ns4.necidc.net 52334 A 121.83.216.162 authority: necidc.net 86313 NS ns3.necidc.net authority: necidc.net 86313 NS ns4.necidc.net authority: necidc.net 86313 NS ns5.necidc.net authority: necidc.net 86313 NS ns.necidc.net authority: necidc.net 86313 NS ns2.necidc.net additional: ns5.necidc.net 52334 A 121.83.216.163
%dnsq a ns5.necidc.net 203.138.63.115
1 ns5.necidc.net: 149 bytes, 1+1+5+1 records, response, weird ra, noerror query: 1 ns5.necidc.net answer: ns5.necidc.net 52318 A 121.83.216.163 authority: necidc.net 86297 NS ns5.necidc.net authority: necidc.net 86297 NS ns.necidc.net authority: necidc.net 86297 NS ns3.necidc.net authority: necidc.net 86297 NS ns4.necidc.net authority: necidc.net 86297 NS ns2.necidc.net additional: ns4.necidc.net 52318 A 121.83.216.162