DNS delegation of c.cbsn.cz updated: May 23, 2013 5:30:14 AM
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about c.cbsn.cz and learn that cz is delegated to five name servers (2), so we ask a.ns.nic.cz where we learn that cbsn.cz is delegated to three name servers, including ns3.cbsn.cz (3), so we ask that one and get the following answer:
C.cbsn.cz is a domain controlled by three domain name servers at cbsn.cz having a total of five IP numbers. Two of them are on the same IP network. Incoming mail for c.cbsn.cz is handled by two mail servers at cbsmail.cz. Both are on different IP networks.