watchNS/akatsuki-novels.com/2017-02-15-NSについて、ここに記述してください。

$ dnsq ns akatsuki-novels.com a.gtld-servers.net

2 akatsuki-novels.com:
206 bytes, 1+0+4+2 records, response, noerror
query: 2 akatsuki-novels.com
authority: akatsuki-novels.com 172800 NS ns-680.awsdns-21.net
authority: akatsuki-novels.com 172800 NS ns-305.awsdns-38.com
authority: akatsuki-novels.com 172800 NS ns-1591.awsdns-06.co.uk
authority: akatsuki-novels.com 172800 NS ns-1432.awsdns-51.org
additional: ns-680.awsdns-21.net 172800 A 205.251.194.168
additional: ns-305.awsdns-38.com 172800 A 205.251.193.49

$ dnsq ns akatsuki-novels.com 205.251.193.49

2 akatsuki-novels.com:
174 bytes, 1+4+0+0 records, response, authoritative, noerror
query: 2 akatsuki-novels.com
answer: akatsuki-novels.com 172800 NS ns-1432.awsdns-51.org
answer: akatsuki-novels.com 172800 NS ns-1591.awsdns-06.co.uk
answer: akatsuki-novels.com 172800 NS ns-305.awsdns-38.com
answer: akatsuki-novels.com 172800 NS ns-680.awsdns-21.net