DNS/TCP/heteml.jpについて、ここに記述してください。

DNS/TCPサポートせずか。

$ dig +notcp -t ns giggle.jp @dns0.heteml.jp.

; <<>> DiG 9.12.1 <<>> +notcp -t ns giggle.jp @dns0.heteml.jp.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21781
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;giggle.jp.                     IN      NS

;; ANSWER SECTION:
giggle.jp.              86400   IN      NS      dns0.heteml.jp.
giggle.jp.              86400   IN      NS      dns1.heteml.jp.

;; ADDITIONAL SECTION:
dns0.heteml.jp.         3600    IN      A       157.7.44.53
dns1.heteml.jp.         3600    IN      A       157.7.44.54

;; Query time: 4 msec
;; SERVER: 157.7.44.53#53(157.7.44.53)
;; WHEN: Mon Apr 23 13:12:25 JST 2018
;; MSG SIZE  rcvd: 104

tmaeno@u16:~$ dig +tcp -t ns giggle.jp @dns0.heteml.jp.
;; Connection to 157.7.44.53#53(157.7.44.53) for giggle.jp failed: connection refused.