pns.dtag.de has one IP number , which also has a corresponding reverse pointer. mis.de, ibo.de, egm.de, sbb.de, ibo.ch and at least 100 other hosts use this as a nameserver. isla-moos.de use this as a mailserver. root.pns.dtag.de are subdomains to this hostname. dtag.de is a domain controlled by two nameservers on different IP networks. pns.dtag.de is hosted on a server in Germany.