mx2.netregistry.net has no NS records.
NS records for this zone are defined at netregistry.net.
NS records for this zone are defined at netregistry.net.
Question and response
Question
dig mx2.netregistry.net. NS
Answer
The response has no answer records.
Authority
netregistry.net. 1800 SOA gabe.ns.cloudflare.com. dns.cloudflare.com. 2395621922 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0