Robtex

Up: 192.163.20.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 192.163.22.0/24
Down right: 192.163.23.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.163.22.1	PTR	den1-edge-1.co.west.pcsuni.com
192.163.22.2	A+PTR	den1-edge-1-1.co.west.pcsuni.com
192.163.22.32	A	hpbx-235.co.west.pcsuni.com
192.163.22.50	A+PTR	hpbx-283.co.west.pcsuni.com
192.163.23.1	PTR	den1-edge-1.co.west.pcsuni.com
192.163.23.2	PTR	den1-edge-1-1.co.west.pcsuni.com
192.163.23.132	PTR	den1-webhost-1.webservices.perfectcloudsolutions.com
192.163.23.132	A	cheaperfords.com
192.163.23.132	A	freewayfordonline.com
192.163.23.141	A	perfectcloudsupport.com
192.163.23.158	PTR	den2-webhost-1.corp.yfci.net
192.163.23.158	A	yfci.net