sb.spf.cuenote.jp has no NS records.
NS records for this zone are defined at spf.cuenote.jp.
NS records for this zone are defined at spf.cuenote.jp.
Question and response
Question
dig sb.spf.cuenote.jp. NS
Answer
The response has no answer records.
Authority
spf.cuenote.jp. 720 SOA dns1.cuenote.jp. server.ymir.co.jp. 2026012000 28800 14400 604800 720
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0