mail.nuflare.co.kr has no NS records.
NS records for this zone are defined at nuflare.co.kr.
NS records for this zone are defined at nuflare.co.kr.
Question and response
Question
dig mail.nuflare.co.kr. NS
Answer
The response has no answer records.
Authority
nuflare.co.kr. 600 SOA ns.gabia.co.kr. hosting.gabia.com. 2021051713 1800 600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0