dns1.broadline.ne.jp has no NS records.
NS records for this zone are defined at broadline.ne.jp.
NS records for this zone are defined at broadline.ne.jp.
Question and response
Question
dig dns1.broadline.ne.jp. NS
Answer
The response has no answer records.
Authority
broadline.ne.jp. 900 SOA dns1.broadline.ne.jp. dns-info.broadline.ne.jp. 343 10800 900 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0