watchNS/graded.brについて、ここに記述してください。
$ dig -t ns graded.br. +dnssec @a.dns.br
; <<>> DiG 9.11.2 <<>> -t ns graded.br. +dnssec @a.dns.br ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25332 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 4096 ;; QUESTION SECTION: ;graded.br. IN NS ;; AUTHORITY SECTION: graded.br. 86400 IN NS ns1170.dns.dyn.com. graded.br. 86400 IN NS ns2196.dns.dyn.com. graded.br. 86400 IN NS ns3180.dns.dyn.com. graded.br. 86400 IN NS ns4172.dns.dyn.com. graded.br. 900 IN NSEC gru.br. NS RRSIG NSEC graded.br. 900 IN RRSIG NSEC 5 2 900 20180119100000 20180112100000 35712 br. Y8qHs3GJzrjqwJNKm5e1qu36/y1mpdgGzdZdaX89h/p6H1np8HesVb2P QSaBojGY9PM9IWv1a1r5Px7WPCMhc/GWF+RVUKhZT1MD4Yv4vHou7r56 byVcdSWAyOz8zIcotFtUB1CgEH6jaxa7vLH7tHmIWHEbWe60SIk7yJWh sifoEKtOwuDMLakFWfb1QRK7VwBSBFcpELiwzNTFzJNmOA== ;; Query time: 303 msec ;; SERVER: 200.160.0.10#53(200.160.0.10) ;; WHEN: Tue Jan 16 13:53:57 JST 2018 ;; MSG SIZE rcvd: 355