mailsender.inetcom.ru has no NS records.
NS records for this zone are defined at inetcom.ru.
NS records for this zone are defined at inetcom.ru.
Question and response
Question
dig mailsender.inetcom.ru. NS
Answer
The response has no answer records.
Authority
inetcom.ru. 86400 SOA ns1.inetcom.ru. dnsmaster.inetcom.ru. 738578201 86400 900 1814400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0