unit.nmugroup.com has no NS records.
NS records for this zone are defined at nmugroup.com.
NS records for this zone are defined at nmugroup.com.
Question and response
Question
dig unit.nmugroup.com. NS
Answer
The response has no answer records.
Authority
nmugroup.com. 3600 SOA origo.nmugroup.com. dns.nmugroup.com. 2026031606 86400 7200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0