bela.datacom.sk has one IP number , which also has a corresponding reverse pointer. mx1.datacom.sk and ns1.datacom.sk point to the same IP. gymlet.sk use this as a mailserver. datacom.sk is a domain controlled by three nameservers at datacom.sk themselves. All of them are on different IP networks. Incoming mail for datacom.sk is handled by three mailservers also at datacom.sk. All of them are on different IP networks. datacom.sk has one IP number , but the reverse is beny.datacom.sk. bela.datacom.sk is hosted on a server in Slovakia.