Apex domains cannot have CNAME records.
Question and response
Question
dig netart-registrar.com. NS
Answer
netart-registrar.com. 1 NS ns3.netart-registrar.com.
netart-registrar.com. 1 NS ns1.netart-registrar.com.
netart-registrar.com. 1 NS ns2.netart-registrar.com.
Authority
The response has no authority records.
Additional
ns1.netart-registrar.com. 1 A 77.55.125.10
ns2.netart-registrar.com. 1 A 77.55.126.10
ns3.netart-registrar.com. 1 A 77.55.127.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0