ns1.bvub.com has no CNAME records.
Question and response
Question
dig ns1.bvub.com. NS
Answer
The response has no answer records.
Authority
bvub.com. 600 SOA ns51.domaincontrol.com. dns.jomax.net. 2025111300 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0