www.customers.imt.ru has no NS records.
NS records for this zone are defined at customers.imt.ru.
NS records for this zone are defined at customers.imt.ru.
Question and response
Question
dig www.customers.imt.ru. NS
Answer
The response has no answer records.
Authority
customers.imt.ru. 86400 SOA ns.msu.net. noc.msu.net. 2018073100 10800 900 864000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0