mail.centrtvorchestva.ru has no NS records.
NS records for this zone are defined at centrtvorchestva.ru.
NS records for this zone are defined at centrtvorchestva.ru.
Question and response
Question
dig mail.centrtvorchestva.ru. NS
Answer
The response has no answer records.
Authority
centrtvorchestva.ru. 1800 SOA crystal.ns.cloudflare.com. dns.cloudflare.com. 2399843087 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0