Apex domains cannot have CNAME records.
Question and response
Question
dig secure64.com. NS
Answer
secure64.com. 4 NS mordax.secure64.com.
secure64.com. 4 NS rataro.secure64.com.
Authority
The response has no authority records.
Additional
mordax.secure64.com. 4 A 65.140.45.179
rataro.secure64.com. 4 A 8.48.82.102
mordax.secure64.com. 4 AAAA 2001:470:c18e:166:0:0:c0a8:a62f
rataro.secure64.com. 4 AAAA 2001:470:41a9:216:0:0:c0a8:d866
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0