ns1.pil.dk has one IP number , which also has a corresponding reverse pointer. ns1.kkowboy.dk, ns1.netimage.dk and ns1.qwebspace.com point to the same IP. n.dk, kd.dk, i1.dk, dri.dk, pil.dk and at least 100 other hosts use this as a nameserver. pil.dk is a domain controlled by three nameservers at pil.dk themselves. All of them are on different IP networks. Incoming mail for pil.dk is handled by two mailservers also at pil.dk. They are on different IP networks. pil.dk has one IP number. ns1.pil.dk is hosted on a server in Denmark.