server91.hosting.reg.ru has no NS records.
NS records for this zone are defined at hosting.reg.ru.
NS records for this zone are defined at hosting.reg.ru.
Question and response
Question
dig server91.hosting.reg.ru. NS
Answer
The response has no answer records.
Authority
hosting.reg.ru. 10800 SOA ns1.reg.ru. hostmaster.ns1.reg.ru. 1772107062 14400 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0