Apex domains cannot have CNAME records.
Question and response
Question
dig nic.hair. NS
Answer
nic.hair. 5 NS b.nic.hair.
nic.hair. 5 NS c.nic.hair.
nic.hair. 5 NS d.nic.hair.
nic.hair. 5 NS a.nic.hair.
Authority
The response has no authority records.
Additional
a.nic.hair. 116346 A 194.169.218.117
b.nic.hair. 116346 A 185.24.64.117
c.nic.hair. 116346 A 212.18.248.117
d.nic.hair. 116346 A 212.18.249.117
a.nic.hair. 116346 AAAA 2001:67c:13cc:0:0:0:1:117
b.nic.hair. 116346 AAAA 2a04:2b00:13cc:0:0:0:1:117
c.nic.hair. 116346 AAAA 2a04:2b00:13ee:0:0:0:0:117
d.nic.hair. 116346 AAAA 2a04:2b00:13ff:0:0:0:0:117
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0