Apex domains cannot have CNAME records.
Question and response
Question
dig trickyblog.com. NS
Answer
trickyblog.com. 4 NS ns2.trickyblog.com.
trickyblog.com. 4 NS ns1.trickyblog.com.
Authority
The response has no authority records.
Additional
ns1.trickyblog.com. 4 A 51.161.13.213
ns2.trickyblog.com. 4 A 51.79.11.245
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0