Apex domains cannot have CNAME records.
Question and response
Question
dig texasrealestatecommission.org. NS
Answer
texasrealestatecommission.org. 5 NS ns1.texasrealestatecommission.org.
texasrealestatecommission.org. 5 NS ns2.texasrealestatecommission.org.
Authority
The response has no authority records.
Additional
ns1.texasrealestatecommission.org. 5 A 5.196.100.197
ns2.texasrealestatecommission.org. 5 A 5.196.100.198
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0