ns2.digmia.com has one IP number , which also has a corresponding reverse pointer. ns03.post.sk point to the same IP. sk.cx, cvd.sk, hpi.sk, duel.sk, bahai.sk and at least 45 other hosts use this as a nameserver. digmia.com is a domain controlled by three nameservers at digmia.com themselves. Two of them are on the same IP network. Incoming mail for digmia.com is handled by two mailservers also at digmia.com. They are on different IP networks. digmia.com has one IP number. ns2.digmia.com is hosted on a server in Slovakia.