gmtp.qwwg.ru has no NS records.
NS records for this zone are defined at qwwg.ru.
NS records for this zone are defined at qwwg.ru.
Question and response
Question
dig gmtp.qwwg.ru. NS
Answer
The response has no answer records.
Authority
qwwg.ru. 600 SOA ns1.masterhost.ru. hostmaster.masterhost.ru. 1773848060 28800 7200 1209600 600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0