Apex domains cannot have CNAME records.
Question and response
Question
dig joesellscharlestonhomes.com. NS
Answer
joesellscharlestonhomes.com. 5 NS ns2.joesellscharlestonhomes.com.
joesellscharlestonhomes.com. 5 NS ns1.joesellscharlestonhomes.com.
Authority
The response has no authority records.
Additional
ns1.joesellscharlestonhomes.com. 5 A 139.99.201.127
ns2.joesellscharlestonhomes.com. 5 A 51.161.144.18
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0