spf.m21.mailds.jp has no NS records.
NS records for this zone are defined at mailds.jp.
NS records for this zone are defined at mailds.jp.
Question and response
Question
dig spf.m21.mailds.jp. NS
Answer
The response has no answer records.
Authority
mailds.jp. 900 SOA rns1.rightsdns.com. domain.master.brights.jp. 2025102007 3600 1200 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0