dns4.thzhost.com has no NS records.
NS records for this zone are defined at thzhost.com.
NS records for this zone are defined at thzhost.com.
Question and response
Question
dig dns4.thzhost.com. NS
Answer
The response has no answer records.
Authority
thzhost.com. 600 SOA dns1.thzhost.com. dnsadmin.thzhost.com. 2026022602 3600 3600 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0