ns.vmts.RU has no CNAME records.
Question and response
Question
dig ns.vmts.RU. NS
Answer
The response has no answer records.
Authority
vmts.ru. 10190 SOA ns.vmts.ru. gav.vmts.ru. 2022051802 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0