smtp.starnet.cz has no NS records.
NS records for this zone are defined at starnet.cz.
NS records for this zone are defined at starnet.cz.
Question and response
Question
dig smtp.starnet.cz. NS
Answer
The response has no answer records.
Authority
starnet.cz. 3600 SOA ns1.starnet.cz. radek.krejca.starnet.cz. 2026031601 3600 3600 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0