free.renter.ru has no NS records.
NS records for this zone are defined at renter.ru.
NS records for this zone are defined at renter.ru.
Question and response
Question
dig free.renter.ru. NS
Answer
The response has no answer records.
Authority
renter.ru. 10800 SOA ns1.agava.net.ru. hostmaster.ns1.agava.net.ru. 1759780559 14400 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0