mx09.h.4dem.it has no NS records.
NS records for this zone are defined at 4dem.it.
NS records for this zone are defined at 4dem.it.
Question and response
Question
dig mx09.h.4dem.it. NS
Answer
The response has no answer records.
Authority
4dem.it. 300 SOA ns-cloud-c1.googledomains.com. cloud-dns-hostmaster.google.com. 1 21600 3600 259200 300
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0