Apex domains cannot have CNAME records.
Question and response
Question
dig doppiozero.to. NS
Answer
doppiozero.to. 5 NS ns3.systemdns.com.
doppiozero.to. 5 NS ns2.systemdns.com.
doppiozero.to. 5 NS ns1.systemdns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0