ccTLD/mx/c.ns.mxについて、ここに記述してください。
おかしな返事をする。nxdomainを返す場合におかしいのかも。
$ dnsq ns ns.mx c.mx-ns.mx
2 ns.mx: 277 bytes, 1+0+6+8 records, response, noerror query: 2 ns.mx authority: ns.mx 86400 NS c.mx-ns.mx authority: ns.mx 86400 NS m.mx-ns.mx authority: ns.mx 86400 NS o.mx-ns.mx authority: ns.mx 86400 NS i.mx-ns.mx authority: ns.mx 86400 NS e.mx-ns.mx authority: ns.mx 86400 NS x.mx-ns.mx additional: c.mx-ns.mx 172800 A 192.100.224.1 additional: c.mx-ns.mx 172800 28 \040\001\022X\000\000\000\000\000\000\000\000\000\000\000\001 additional: e.mx-ns.mx 172800 A 189.201.244.1 additional: i.mx-ns.mx 172800 A 207.248.68.1 additional: m.mx-ns.mx 172800 A 200.94.176.1 additional: m.mx-ns.mx 172800 28 \040\001\023\307p\000\000\000\000\000\000\000\000\000\000\001 additional: o.mx-ns.mx 172800 A 200.23.1.1 additional: x.mx-ns.mx 172800 A 201.131.252.1
$ dnsq ns c.ns.mx c.mx-ns.mx
2 c.ns.mx: 279 bytes, 1+0+6+8 records, response, noerror query: 2 c.ns.mx authority: ns.mx 86400 NS m.mx-ns.mx authority: ns.mx 86400 NS c.mx-ns.mx authority: ns.mx 86400 NS i.mx-ns.mx authority: ns.mx 86400 NS e.mx-ns.mx authority: ns.mx 86400 NS x.mx-ns.mx authority: ns.mx 86400 NS o.mx-ns.mx additional: c.mx-ns.mx 172800 A 192.100.224.1 additional: c.mx-ns.mx 172800 28 \040\001\022X\000\000\000\000\000\000\000\000\000\000\000\001 additional: e.mx-ns.mx 172800 A 189.201.244.1 additional: i.mx-ns.mx 172800 A 207.248.68.1 additional: m.mx-ns.mx 172800 A 200.94.176.1 additional: m.mx-ns.mx 172800 28 \040\001\023\307p\000\000\000\000\000\000\000\000\000\000\001 additional: o.mx-ns.mx 172800 A 200.23.1.1 additional: x.mx-ns.mx 172800 A 201.131.252.1