Apex domains cannot have CNAME records.
Question and response
Question
dig ccrtc.com. NS
Answer
ccrtc.com. 5 NS ns2.ccrtc.com.
ccrtc.com. 5 NS ns1.ccrtc.com.
ccrtc.com. 5 NS ns3.ccrtc.com.
Authority
The response has no authority records.
Additional
ns1.ccrtc.com. 5 A 209.132.160.4
ns2.ccrtc.com. 5 A 209.132.160.5
ns3.ccrtc.com. 5 A 74.117.153.235
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0