ns2.vernet.su has no CNAME records.
Question and response
Question
dig ns2.vernet.su. NS
Answer
The response has no answer records.
Authority
vernet.su. 3600 SOA ns.vernet.su. hostmaster.vernet.su. 2026011402 7200 1800 1209610 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0