There is a central registry for every country code top-level domain (ccTLD). (Internet Verwaltungs- und Betriebsgesellschaft m.b.H.) is the central office for the registration and administration of all domains ending with .at, or operates a database with all domain entries as well as special nameservers so that these domains can be reached. The Vienna University Computer Center (ZID) maintains this registry database and these nameservers within a close cooperation and on the basis of a contract with