alt.aspxm.daum.net has no NS records.
NS records for this zone are defined at daum.net.
NS records for this zone are defined at daum.net.
Question and response
Question
dig alt.aspxm.daum.net. NS
Answer
The response has no answer records.
Authority
daum.net. 300 SOA ns.kakaocorp.com. root.kakaocorp.com. 1669026242 1800 600 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0