mx.fastfone.it has no NS records.
NS records for this zone are defined at fastfone.it.
NS records for this zone are defined at fastfone.it.
Question and response
Question
dig mx.fastfone.it. NS
Answer
The response has no answer records.
Authority
fastfone.it. 1053 SOA dns.technorail.com. hostmaster.fastfone.it. 2026020503 86400 7200 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0