mx.interlink.or.jp has no NS records.
NS records for this zone are defined at interlink.or.jp.
NS records for this zone are defined at interlink.or.jp.
Question and response
Question
dig mx.interlink.or.jp. NS
Answer
The response has no answer records.
Authority
interlink.or.jp. 3600 SOA dns1.interlink.or.jp. root.dns1.interlink.ad.jp. 2026020601 86400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0