service-1.ru.eserver.net has no NS records.
NS records for this zone are defined at ru.eserver.net.
NS records for this zone are defined at ru.eserver.net.
Question and response
Question
dig service-1.ru.eserver.net. NS
Answer
The response has no answer records.
Authority
ru.eserver.net. 1800 SOA ns1.ru.eserver.net. hostmaster.eserver.ru. 1773876979 7200 3600 604800 1800
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0