ns2.zbzoom.net has no CNAME records.
Question and response
Question
dig ns2.zbzoom.net. NS
Answer
The response has no answer records.
Authority
zbzoom.net. 300 SOA dm-1.zoominternet.net. inetoperations.zoominternet.net. 2022051101 60 900 86400 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0