mail-fe-ms04.it.net has no NS records.
NS records for this zone are defined at it.net.
NS records for this zone are defined at it.net.
Question and response
Question
dig mail-fe-ms04.it.net. NS
Answer
The response has no answer records.
Authority
it.net. 900 SOA dns.it.net. dns.reevodns.it. 2026020501 86400 7200 2592000 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0