vbox.siberianet.ru has no NS records.
NS records for this zone are defined at siberianet.ru.
NS records for this zone are defined at siberianet.ru.
Question and response
Question
dig vbox.siberianet.ru. NS
Answer
The response has no answer records.
Authority
siberianet.ru. 1800 SOA julio.ns.cloudflare.com. dns.cloudflare.com. 2398195019 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0