dns1.citynet.pl has no NS records.
NS records for this zone are defined at citynet.pl.
NS records for this zone are defined at citynet.pl.
Question and response
Question
dig dns1.citynet.pl. NS
Answer
The response has no answer records.
Authority
citynet.pl. 10800 SOA fns1.42.pl. freedns-admin+197352.42.pl. 1750279200 86400 10800 3600000 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0