ns.belleville.cz has no NS records.
NS records for this zone are defined at belleville.cz.
NS records for this zone are defined at belleville.cz.
Question and response
Question
dig ns.belleville.cz. NS
Answer
The response has no answer records.
Authority
belleville.cz. 2560 SOA ns1.websupport.cz. admin.websupport.cz. 1757172708 7200 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0