*.oasis.de has one IP number , which is the same as for oasis.de, but the reverse is tatooine-1.eurodns.com. bdh.fr, gvp.fr, 110.fr, ayu.fr, m-d.fr and at least 100 other hosts point to the same IP. oasis.de is a domain controlled by two nameservers at eurodns.com. They are on the same IP network. Incoming mail for oasis.de is handled by one mailserver at oasis.de themselves. *.oasis.de is hosted on a server in Luxembourg even though the hostname implies Germany.