pd.sanet.sk has no NS records.
NS records for this zone are defined at sanet.sk.
NS records for this zone are defined at sanet.sk.
Question and response
Question
dig pd.sanet.sk. NS
Answer
pd.sanet.sk. 86400 NS ns.stuba.sk.
pd.sanet.sk. 86400 NS frpd.utcpd.sk.
Authority
The response has no authority records.
Additional
. 0 OPT [{Extended_DNS_Error: PROHIBITED}] ; payload 1232, xrcode 0, version 0, flags 0