email.doppiozero.to has no NS records.
NS records for this zone are defined at doppiozero.to.
NS records for this zone are defined at doppiozero.to.
Question and response
Question
dig email.doppiozero.to. NS
Answer
The response has no answer records.
Authority
doppiozero.to. 60 SOA ns1.systemdns.com. hostmaster.systemdns.com. 1771951417 10800 3600 1209600 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0