mail.itmnetworks.net has no NS records.
NS records for this zone are defined at itmnetworks.net.
NS records for this zone are defined at itmnetworks.net.
Question and response
Question
dig mail.itmnetworks.net. NS
Answer
The response has no answer records.
Authority
itmnetworks.net. 1800 SOA jerome.ns.cloudflare.com. dns.cloudflare.com. 2397124825 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0