Apex domains cannot have CNAME records.
Question and response
Question
dig ns.cheetahces.com. NS
Answer
ns.cheetahces.com. 5 NS a.ns.cheetahces.com.
ns.cheetahces.com. 5 NS d.ns.cheetahces.com.
ns.cheetahces.com. 5 NS c.ns.cheetahces.com.
ns.cheetahces.com. 5 NS b.ns.cheetahces.com.
Authority
The response has no authority records.
Additional
a.ns.cheetahces.com. 5 A 205.251.195.67
b.ns.cheetahces.com. 5 A 205.251.195.67
c.ns.cheetahces.com. 5 A 205.251.199.20
d.ns.cheetahces.com. 5 A 205.251.193.44
a.ns.cheetahces.com. 5 AAAA 2600:9000:5304:ce00:0:0:0:1
b.ns.cheetahces.com. 5 AAAA 2600:9000:5303:4300:0:0:0:1
c.ns.cheetahces.com. 5 AAAA 2600:9000:5307:1400:0:0:0:1
d.ns.cheetahces.com. 5 AAAA 2600:9000:5301:2c00:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0