We pick i.root-servers.net, one of the 13 root servers (1), and ask it about kz.hr and learn that hr is delegated to five name servers (2), so we ask ns5.univie.ac.at where we learn that kz.hr is delegated to two name servers, including dns2.in4host.com (3), so we ask that one and get the following answer:
Kz.hr is a domain controlled by two domain name servers at in4host.com. Both are on the same IP network. Incoming mail for kz.hr is handled by one mail server at kz.hr themselves. Kz.hr has one IP number (220.127.116.11), but the reverse is ?.