Apex domains cannot have CNAME records.
Question and response
Question
dig amp.vg. NS
Answer
amp.vg. 5 NS ns77.domaincontrol.com.
amp.vg. 5 NS ns78.domaincontrol.com.
Authority
The response has no authority records.
Additional
ns77.domaincontrol.com. 1 A 97.74.108.49
ns78.domaincontrol.com. 1 A 173.201.76.49
ns77.domaincontrol.com. 1 AAAA 2603:5:21c4:0:0:0:0:31
ns78.domaincontrol.com. 1 AAAA 2603:5:22c4:0:0:0:0:31
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0