DNS/oarc.net/txt/kresdについて、ここに記述してください。

$ dig -t txt rst.x4090.rs.dns-oarc.net. 

; <<>> DiG 9.11.1 <<>> -t txt rst.x4090.rs.dns-oarc.net.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 63544
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 84d822e81fb603ca36d366cf5968dc9dd34d83c699897add (good)
;; QUESTION SECTION:
;rst.x4090.rs.dns-oarc.net.     IN      TXT

;; Query time: 420 msec
;; SERVER: 127.0.0.3#53(127.0.0.3)
;; WHEN: Sat Jul 15 00:00:46 JST 2017
;; MSG SIZE  rcvd: 82