ns2.byteplusdns.net has no CNAME records.
Question and response
Question
dig ns2.byteplusdns.net. NS
Answer
The response has no answer records.
Authority
byteplusdns.net. 251 SOA a1-156.akam.net. hostmaster.byteplusdns.net. 2022032103 3600 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0