Apex domains cannot have CNAME records.
Question and response
Question
dig adamscomputerandnetwork.com. NS
Answer
adamscomputerandnetwork.com. 5 NS mail.ar-star.com.
adamscomputerandnetwork.com. 5 NS ns.adamscomputerandnetwork.com.
adamscomputerandnetwork.com. 5 NS ns.ar-star.com.
Authority
The response has no authority records.
Additional
ns.ar-star.com. 5 A 152.53.37.68
ns.adamscomputerandnetwork.com. 5 A 152.53.210.47
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0