Apex domains cannot have CNAME records.
Question and response
Question
dig jcwdns.com. NS
Answer
jcwdns.com. 5 NS cdns1.cpt.wa.co.za.
jcwdns.com. 5 NS cdns2.cpt.wa.co.za.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0