Apex domains cannot have CNAME records.
Question and response
Question
dig mx62.com. NS
Answer
mx62.com. 5 NS ns02.mx62.com.
mx62.com. 5 NS ns01.mx62.com.
Authority
The response has no authority records.
Additional
ns01.mx62.com. 5 A 54.84.69.64
ns02.mx62.com. 5 A 54.173.41.165
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0