watchNS/utf-8.jpについて、ここに記述してください。

%dnsq ns utf-8.jp
{{{
2 utf-8.jp:
72 bytes, 1+0+2+0 records, response, noerror
query: 2 utf-8.jp
authority: utf-8.jp 86400 NS ns2.s-lines.net
authority: utf-8.jp 86400 NS ns.s-lines.net
}}}

$ dnsq a ns.s-lines.net 116.91.122.113
{{{
1 ns.s-lines.net:
152 bytes, 1+1+2+3 records, response, authoritative, noerror
query: 1 ns.s-lines.net
answer: ns.s-lines.net 600 A 116.91.122.113
authority: s-lines.net 600 NS ns.s-lines.net
authority: s-lines.net 600 NS ns2.s-lines.net
additional: ns.s-lines.net 600 28 \040\001\003\340\014\222\022\000\000\000\000\000\000S\000\021
additional: ns2.s-lines.net 600 A 182.48.42.230
additional: ns2.s-lines.net 600 28 \040\001\003\340\014\222\000\000\000\000\000\000\000S\0020
}}}

NSレコードのTTLが600とは、DNS設定が分かっていない口らしい。

$ dnsq a utf-8.jp ns.s-lines.net
{{{
1 utf-8.jp:
176 bytes, 1+1+2+4 records, response, authoritative, noerror
query: 1 utf-8.jp
answer: utf-8.jp 600 A 116.91.122.114
authority: utf-8.jp 600 NS ns.s-lines.net
authority: utf-8.jp 600 NS ns2.s-lines.net
additional: ns.s-lines.net 600 A 116.91.122.113
additional: ns.s-lines.net 600 28 \040\001\003\340\014\222\022\000\000\000\000\000\000S\000\021
additional: ns2.s-lines.net 600 A 182.48.42.230
additional: ns2.s-lines.net 600 28 \040\001\003\340\014\222\000\000\000\000\000\000\000S\0020
}}}

A の値を見ると、utf-8.jp, s-lines.net は同一の運営者か。