dns.itnetcloud.com has no NS records.
NS records for this zone are defined at itnetcloud.com.
NS records for this zone are defined at itnetcloud.com.
Question and response
Question
dig dns.itnetcloud.com. NS
Answer
The response has no answer records.
Authority
itnetcloud.com. 3600 SOA dns.itnetcloud.com. hostmaster.itnetcloud.com. 1540612994 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0