We pick l.root-servers.net, one of the 13 root servers (1), and ask it about eme.bz and learn that bz is delegated to six name servers (2), so we ask b2.cctld.afilias-nst.org where we learn that eme.bz is delegated to two name servers, including ns1.domaindiscover.com (3), so we ask that one and get the following answer:
Eme.bz is a domain controlled by two domain name servers at domaindiscover.com. Both are on the same IP network. Incoming mail for eme.bz is handled by one mail server at eme.bz themselves.