Apex domains cannot have CNAME records.
Question and response
Question
dig tavant.com. NS
Answer
tavant.com. 5 NS ns4.tavant.net.
tavant.com. 5 NS ns2.tavant.net.
tavant.com. 5 NS ns1.tavant.net.
tavant.com. 5 NS ns3.tavant.net.
Authority
The response has no authority records.
Additional
ns1.tavant.net. 5 A 165.193.250.82
ns2.tavant.net. 5 A 12.34.92.207
ns3.tavant.net. 5 A 184.169.208.193
ns4.tavant.net. 5 A 54.193.155.11
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0