mx.pipz.io has no NS records.
NS records for this zone are defined at pipz.io.
NS records for this zone are defined at pipz.io.
Question and response
Question
dig mx.pipz.io. NS
Answer
The response has no answer records.
Authority
pipz.io. 1800 SOA alex.ns.cloudflare.com. dns.cloudflare.com. 2396727269 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0