TLD/xyzについて、ここに記述してください。

$ dnsq ns xyz a.root-servers.net
2 xyz:
277 bytes, 1+0+4+8 records, response, noerror
query: 2 xyz
authority: xyz 172800 NS x.nic.xyz
authority: xyz 172800 NS generationxyz.nic.xyz
authority: xyz 172800 NS z.nic.xyz
authority: xyz 172800 NS y.nic.xyz
additional: x.nic.xyz 172800 A 194.169.218.42
additional: x.nic.xyz 172800 28 \040\001\006|\023\314\000\000\000\000\000\000\000\001\000B
additional: generationxyz.nic.xyz 172800 A 212.18.249.42
additional: generationxyz.nic.xyz 172800 28 *\004+\000\023\377\000\000\000\000\000\000\000\000\000B
additional: z.nic.xyz 172800 A 212.18.248.42
additional: z.nic.xyz 172800 28 *\004+\000\023\356\000\000\000\000\000\000\000\000\000B
additional: y.nic.xyz 172800 A 185.24.64.42
additional: y.nic.xyz 172800 28 *\004+\000\023\314\000\000\000\000\000\000\000\001\000B

JPもそうだけど、なぜ子ゾーン内の名前をglueに登録しているのだろう。

-- ToshinoriMaeno 2018-06-15 05:29:59

$ dig -t a x.nic.xyz @194.169.218.42

; <<>> DiG 9.12.1 <<>> -t a x.nic.xyz @194.169.218.42
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54221
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 6, ADDITIONAL: 13
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;x.nic.xyz.                     IN      A

;; ANSWER SECTION:
x.nic.xyz.              172800  IN      A       194.169.218.42

;; AUTHORITY SECTION:
nic.xyz.                172800  IN      NS      ns0.nic.xyz.
nic.xyz.                172800  IN      NS      ns1.nic.xyz.
nic.xyz.                172800  IN      NS      ns2.nic.xyz.
nic.xyz.                172800  IN      NS      ns3.nic.xyz.
nic.xyz.                172800  IN      NS      ns4.nic.xyz.
nic.xyz.                172800  IN      NS      ns5.nic.xyz.

;; ADDITIONAL SECTION:
ns0.nic.xyz.            172800  IN      A       185.24.67.200
ns1.nic.xyz.            172800  IN      A       185.24.67.201
ns2.nic.xyz.            172800  IN      A       185.24.67.202
ns3.nic.xyz.            172800  IN      A       212.18.251.203
ns4.nic.xyz.            172800  IN      A       212.18.251.204
ns5.nic.xyz.            172800  IN      A       212.18.251.205
ns0.nic.xyz.            172800  IN      AAAA    2a04:2b00:14aa::200
ns1.nic.xyz.            172800  IN      AAAA    2a04:2b00:14aa::201
ns2.nic.xyz.            172800  IN      AAAA    2a04:2b00:14aa::202
ns3.nic.xyz.            172800  IN      AAAA    2a04:2b00:14bb::203
ns4.nic.xyz.            172800  IN      AAAA    2a04:2b00:14bb::204
ns5.nic.xyz.            172800  IN      AAAA    2a04:2b00:14bb::205

;; Query time: 124 msec
;; SERVER: 194.169.218.42#53(194.169.218.42)
;; WHEN: Fri Jun 15 14:31:08 JST 2018
;; MSG SIZE  rcvd: 426