dns.gtsi.sk has no NS records.
NS records for this zone are defined at gtsi.sk.
NS records for this zone are defined at gtsi.sk.
Question and response
Question
dig dns.gtsi.sk. NS
Answer
The response has no answer records.
Authority
gtsi.sk. 900 SOA ns.nextra.sk. hostmaster.nextra.sk. 2022110901 21600 7200 1209600 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0