ns1.IS74.RU has no NS records.
NS records for this zone are defined at IS74.RU.
NS records for this zone are defined at IS74.RU.
Question and response
Question
dig ns1.IS74.RU. NS
Answer
The response has no answer records.
Authority
is74.ru. 1800 SOA ns1.is74.ru. hostmaster.is74.ru. 2018362413 1800 600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0