ns1.masterhost.ru has no NS records.
NS records for this zone are defined at masterhost.ru.
NS records for this zone are defined at masterhost.ru.
Question and response
Question
dig ns1.masterhost.ru. NS
Answer
The response has no answer records.
Authority
masterhost.ru. 600 SOA ns5.masterhost.ru. hostmaster.masterhost.ru. 1 28800 7200 1209600 600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0