Apex domains cannot have CNAME records.
Question and response
Question
dig byethost27.org. NS
Answer
byethost27.org. 5 NS ns2.byethost27.org.
byethost27.org. 5 NS ns1.byethost27.org.
Authority
The response has no authority records.
Additional
ns1.byethost27.org. 5 A 31.22.4.59
ns2.byethost27.org. 5 A 31.22.4.12
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0