dec59.ruk.cuni.cz has no NS records.
NS records for this zone are defined at ruk.cuni.cz.
NS records for this zone are defined at ruk.cuni.cz.
Question and response
Question
dig dec59.ruk.cuni.cz. NS
Answer
The response has no answer records.
Authority
ruk.cuni.cz. 86400 SOA golias.ruk.cuni.cz. postmaster.dec59.ruk.cuni.cz. 2026032313 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0