ns1.regzone.cz has one IP number , which also has a corresponding reverse pointer. iocaste.czechia.com point to the same IP. zh.cz, ad1.cz, zas.sk, fok.cz, zlk.cz and at least 100 other hosts use this as a nameserver. gfpvm.cz, mylove.cz, dobazaru.sk, dobazaru.cz, ve-vyskach.cz and at least two other hosts use this as a mailserver. regzone.cz is a domain controlled by two nameservers on different IP networks. Incoming mail for regzone.cz is handled by three mailservers having a total of eight IP numbers. Some of them are on the same IP network. regzone.cz has one IP number. ns1.regzone.cz is hosted on a server in Czech Republic.