Apex domains cannot have CNAME records.
Question and response
Question
dig nic.vg. NS
Answer
nic.vg. 5 NS d.nic.vg.
nic.vg. 5 NS a.nic.vg.
nic.vg. 5 NS b.nic.vg.
nic.vg. 5 NS c.nic.vg.
Authority
The response has no authority records.
Additional
a.nic.vg. 14617 A 194.169.218.104
b.nic.vg. 14617 A 185.24.64.104
c.nic.vg. 14617 A 212.18.248.104
d.nic.vg. 14617 A 212.18.249.104
a.nic.vg. 14617 AAAA 2001:67c:13cc:0:0:0:1:104
b.nic.vg. 14617 AAAA 2a04:2b00:13cc:0:0:0:1:104
c.nic.vg. 14617 AAAA 2a04:2b00:13ee:0:0:0:0:104
d.nic.vg. 14617 AAAA 2a04:2b00:13ff:0:0:0:0:104
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0