mail-vm.samaralan.ru has no NS records.
NS records for this zone are defined at samaralan.ru.
NS records for this zone are defined at samaralan.ru.
Question and response
Question
dig mail-vm.samaralan.ru. NS
Answer
The response has no answer records.
Authority
samaralan.ru. 86400 SOA ns1.samaralan.ru. dav.ns1.samaralan.ru. 2025111101 3600 60 200000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0