Apex domains cannot have CNAME records.
Question and response
Question
dig adriahost.com. NS
Answer
adriahost.com. 5 NS ns88.adriahost.com.
adriahost.com. 5 NS ns87.adriahost.com.
Authority
The response has no authority records.
Additional
ns87.adriahost.com. 5 A 5.79.69.71
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0