watchNS/world-minecraft.comについて、ここに記述してください。

https://twitter.com/rizeriy25/status/936193475485118464 20:21 - 2017年11月30日

$ whois  world-minecraft.com 
   Domain Name: WORLD-MINECRAFT.COM
   Registry Domain ID: 2014838841_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.star-domain.jp
   Registrar URL: http://www.netowl.jp
   Updated Date: 2017-01-09T02:00:16Z
   Creation Date: 2016-03-23T02:40:33Z
   Registry Expiry Date: 2023-03-23T02:40:33Z
   Registrar: Netowl, Inc.
   Registrar IANA ID: 1557
   Registrar Abuse Contact Email: registrar-abuse@netowl.jp
   Registrar Abuse Contact Phone: +81.662928811
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Name Server: NS1.XSERVER.JP
   Name Server: NS2.XSERVER.JP
   Name Server: NS3.XSERVER.JP
   Name Server: NS4.XSERVER.JP
   Name Server: NS5.XSERVER.JP

$ dnsq a world-minecraft.com ns1.xserver.jp
1 world-minecraft.com:
53 bytes, 1+1+0+0 records, response, authoritative, noerror
query: 1 world-minecraft.com
answer: world-minecraft.com 600 A 183.90.242.10

$ dig -x 183.90.242.10

; <<>> DiG 9.11.2 <<>> -x 183.90.242.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18256
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;10.242.90.183.in-addr.arpa.    IN      PTR

;; ANSWER SECTION:
10.242.90.183.in-addr.arpa. 3600 IN     PTR     sv2109.xserver.jp.

;; Query time: 525 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri Dec 01 12:05:53 JST 2017
;; MSG SIZE  rcvd: 86

$ dig -t ns world-minecraft.com @ns1.xserver.jp

; <<>> DiG 9.11.2 <<>> -t ns world-minecraft.com @ns1.xserver.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13932
;; flags: qr aa rd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 27
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;world-minecraft.com.           IN      NS

;; ANSWER SECTION:
world-minecraft.com.    86400   IN      NS      ns2.xserver.jp.
world-minecraft.com.    86400   IN      NS      ns3.xserver.jp.
world-minecraft.com.    86400   IN      NS      ns1.xserver.jp.
world-minecraft.com.    86400   IN      NS      ns5.xserver.jp.
world-minecraft.com.    86400   IN      NS      ns4.xserver.jp.

;; ADDITIONAL SECTION:
ns1.xserver.jp.         3600    IN      A       219.94.200.165
ns4.xserver.jp.         3600    IN      A       183.90.224.229
ns1.xserver.jp.         3600    IN      A       219.94.200.170
ns5.xserver.jp.         3600    IN      A       157.112.182.216
ns4.xserver.jp.         3600    IN      A       183.90.224.226
ns2.xserver.jp.         3600    IN      A       157.112.182.223
ns1.xserver.jp.         3600    IN      A       219.94.200.164
ns4.xserver.jp.         3600    IN      A       183.90.224.227
ns5.xserver.jp.         900     IN      A       210.188.201.247
ns2.xserver.jp.         3600    IN      A       157.112.182.224
ns5.xserver.jp.         3600    IN      A       157.112.182.217
ns5.xserver.jp.         3600    IN      A       157.112.182.218
ns1.xserver.jp.         3600    IN      A       219.94.200.166
ns1.xserver.jp.         900     IN      A       219.94.200.246
ns2.xserver.jp.         900     IN      A       210.188.201.246
ns3.xserver.jp.         900     IN      A       219.94.200.247
ns1.xserver.jp.         3600    IN      A       219.94.200.168
ns4.xserver.jp.         900     IN      A       219.94.203.247
ns5.xserver.jp.         3600    IN      A       157.112.182.219
ns4.xserver.jp.         3600    IN      A       183.90.224.228
ns5.xserver.jp.         3600    IN      A       157.112.182.220
ns4.xserver.jp.         3600    IN      A       183.90.224.230
ns2.xserver.jp.         3600    IN      A       157.112.182.222
ns2.xserver.jp.         3600    IN      A       157.112.182.225
ns1.xserver.jp.         3600    IN      A       219.94.200.167
ns2.xserver.jp.         3600    IN      A       157.112.182.221
ns1.xserver.jp.         3600    IN      A       219.94.200.169

;; Query time: 12 msec
;; SERVER: 219.94.200.246#53(219.94.200.246)
;; WHEN: Fri Dec 01 12:09:09 JST 2017
;; MSG SIZE  rcvd: 569