*.tunemag.dk has one IP number , which is the same as for tunemag.dk, but the reverse is zapp.inwx.net. di-i.de, apor.it, inwx.de, iesy.com, imosh.de and at least 100 other hosts point to the same IP. tunemag.dk is a domain controlled by three nameservers at inwx.de. All of them are on different IP networks. Incoming mail for tunemag.dk is handled by one mailserver having a total of two IP numbers. They are on the same IP network. *.tunemag.dk is hosted on a server in Germany even though the hostname implies Denmark.