dns.carnet.hr has one IP number , which also has a corresponding reverse pointer. djw.hr, zid.hr, nsz.hr, sek.hr, fsr.hr and at least 100 other hosts use this as a nameserver. carnet.hr is a domain controlled by two nameservers at carnet.hr themselves. They are on the same IP network. Incoming mail for carnet.hr is handled by two mailservers also at carnet.hr. They are on the same IP network. dns.carnet.hr is hosted on a server in Croatia.