Robtex

Up: 81.63.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 81.63.0.0/18
Down right: 81.63.64.0/18

IP	Type	Hostname
81.63.62.22	A	stag-messagingproxy.swisscom.ch
81.63.79.88	PTR	88.79.63.81.cust.bluewin.ch
81.63.94.78	A	78.94.63.81.cust.bluewin.ch
81.63.99.120	A	120.99.63.81.cust.bluewin.ch
81.63.106.155	PTR	155.106.63.81.cust.bluewin.ch
81.63.127.231	A	home.webdiscounter.ch