Apex domains cannot have CNAME records.
Question and response
Question
dig byteplusdns.net. NS
Answer
byteplusdns.net. 4 NS a7-65.akam.net.
byteplusdns.net. 4 NS a16-66.akam.net.
byteplusdns.net. 4 NS a12-65.akam.net.
byteplusdns.net. 4 NS a3-64.akam.net.
byteplusdns.net. 4 NS a2-67.akam.net.
byteplusdns.net. 4 NS a1-156.akam.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0