dec52.lf1.cuni.cz has no NS records.
NS records for this zone are defined at lf1.cuni.cz.
NS records for this zone are defined at lf1.cuni.cz.
Question and response
Question
dig dec52.lf1.cuni.cz. NS
Answer
The response has no answer records.
Authority
lf1.cuni.cz. 86400 SOA ns.lf1.cuni.cz. postmaster.lf1.cuni.cz. 2026032605 1800 60 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0