mx2.tuke.sk has no NS records.
NS records for this zone are defined at tuke.sk.
NS records for this zone are defined at tuke.sk.
Question and response
Question
dig mx2.tuke.sk. NS
Answer
The response has no answer records.
Authority
tuke.sk. 86400 SOA a.ns.tuke.sk. hostmaster.tuke.sk. 2026022505 21600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0