dns2.powertech.no has one IP number , which also has a corresponding reverse pointer. nj.no, sv.no, lc.no, ad.no, fe.no and at least 100 other hosts use this as a nameserver. phoenixcontact.no use this as a mailserver. powertech.no is a domain controlled by two nameservers at powertech.no themselves. They are on the same IP network. Incoming mail for powertech.no is handled by two mailservers on the same IP network. powertech.no has one IP number. dns2.powertech.no is hosted on a server in Norway.