mx2.pvenezia.com has no NS records.
NS records for this zone are defined at pvenezia.com.
NS records for this zone are defined at pvenezia.com.
Question and response
Question
dig mx2.pvenezia.com. NS
Answer
The response has no answer records.
Authority
pvenezia.com. 8640 SOA ns1.pvenezia.com. root.pvenezia.com. 1998081123 8640 360 60480 8640
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0