nden1.fvds.ru has no CNAME records.
Question and response
Question
dig nden1.fvds.ru. NS
Answer
The response has no answer records.
Authority
fvds.ru. 1367 SOA ns1.firstvds.ru. tech.firstvds.ru. 2024074750 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0