ns2.vnet.ee has one IP number , which also has a corresponding reverse pointer. ntk.ee, vnk.ee, glj.ee, vkg.ee, mtr.ee and at least 100 other hosts use this as a nameserver. vnet.ee is a domain controlled by two nameservers at vnet.ee themselves. They are on different IP networks. Incoming mail for vnet.ee is handled by one mailserver also at vnet.ee. vnet.ee has one IP number , but the reverse is mail.vnet.ee. ns2.vnet.ee is hosted on a server in Estonia.