Apex domains cannot have CNAME records.
Question and response
Question
dig casjaydns.com. NS
Answer
casjaydns.com. 5 NS dns2.casjaydns.com.
casjaydns.com. 5 NS dns.casjaydns.com.
casjaydns.com. 5 NS dns1.casjaydns.com.
Authority
The response has no authority records.
Additional
dns.casjaydns.com. 5 A 82.29.128.43
dns1.casjaydns.com. 5 A 103.124.104.139
dns2.casjaydns.com. 5 A 103.124.105.192
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0