mail.profinetworks.cz has no NS records.
NS records for this zone are defined at profinetworks.cz.
NS records for this zone are defined at profinetworks.cz.
Question and response
Question
dig mail.profinetworks.cz. NS
Answer
The response has no answer records.
Authority
profinetworks.cz. 900 SOA ns.web4u.cz. admin.web4u.cz. 2026021901 14400 3600 1209600 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0