91.200.239.0.ip.interplus.com.pl has no NS records.
NS records for this zone are defined at ip.interplus.com.pl.
NS records for this zone are defined at ip.interplus.com.pl.
Question and response
Question
dig 91.200.239.0.ip.interplus.com.pl. NS
Answer
The response has no answer records.
Authority
ip.interplus.com.pl. 3600 SOA dns1.interplus.com.pl. lukasz.itservice4u.pl. 2018110201 43200 900 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0