mx02.elmecnet.net has no NS records.
NS records for this zone are defined at elmecnet.net.
NS records for this zone are defined at elmecnet.net.
Question and response
Question
dig mx02.elmecnet.net. NS
Answer
The response has no answer records.
Authority
elmecnet.net. 900 SOA ns1.register.it. hostmaster.register.it. 2026012003 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0