Robtex

Up: 8.28.66.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 8.28.67.0/25
Down right: 8.28.67.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
8.28.67.1	PTR	g02.border01.champ.catalystapps.com
8.28.67.2	PTR	em3.border01.arap.catalystapps.com
8.28.67.3	PTR	e16.fw01.arap.catalystapps.com
8.28.67.5	PTR	e06.fw01.champ.catalystapps.com
8.28.67.6	PTR	vlan8.border02.arap.catalystapps.com
8.28.67.24	A+PTR	prizm.catalystapps.com
8.28.67.32	A+PTR	us02.catalystapps.com
8.28.67.33	A+PTR	secure.caseshare.com
8.28.67.34	A+PTR	ftp.catalystapps.com
8.28.67.35	A+PTR	ul.caybd.com
8.28.67.36	PTR	ovpn.catalystapps.com
8.28.67.38	PTR	insight.catalystapps.com
8.28.67.40	A+PTR	us01.catalystapps.com
8.28.67.41	A+PTR	ovpnsoc.catalystapps.com
8.28.67.41	A	catalystsecure.net
8.28.67.41	A	bach.caseshare.com
8.28.67.42	A+PTR	dilbert.caseshare.com
8.28.67.43	A+PTR	filter.caseshare.com
8.28.67.44	PTR	toolbox.catalystapps.com
8.28.67.45	A+PTR	dm.caseshare.com
8.28.67.46	A+PTR	livenotedev.catalystapps.com
8.28.67.47	A+PTR	sc.caseshare.com
8.28.67.48	A+PTR	zap.caseshare.com
8.28.67.49	PTR	exns02.catalystapps.com
8.28.67.50	A+PTR	demo.catalystapps.com
8.28.67.51	A+PTR	beta.caseshare.com
8.28.67.52	A+PTR	files.caseshare.com
8.28.67.53	A+PTR	secure.catalystapps.com
8.28.67.54	A+PTR	evrs.catalystapps.com
8.28.67.56	A+PTR	ecp.catalystapps.com
8.28.67.57	A+PTR	reit.catalystapps.com
8.28.67.57	A	aigenvironmentalportal.com
8.28.67.58	A+PTR	fairfield.catalystapps.com
8.28.67.59	A+PTR	services.caseshare.com
8.28.67.60	A+PTR	beta.catalystapps.com
8.28.67.61	A+PTR	sci.catalystapps.com
8.28.67.64	A+PTR	onramp.catalystapps.com
8.28.67.65	A+PTR	aig.catalystapps.com
8.28.67.66	A+PTR	ars.catalystapps.com
8.28.67.67	A+PTR	ecs.catalystapps.com
8.28.67.68	A+PTR	stageecsrpt.catalystapps.com
8.28.67.70	A+PTR	barrel01.catalystapps.com
8.28.67.71	A+PTR	stage.catalystapps.com
8.28.67.73	A+PTR	us04.catalystapps.com
8.28.67.74	A+PTR	hatchet.catalystapps.com
8.28.67.75	A+PTR	blackbox.catalystapps.com
8.28.67.76	A+PTR	temple02.catalystapps.com
8.28.67.77	A+PTR	smtp02.catalystapps.com
8.28.67.79	A+PTR	us03.catalystapps.com
8.28.67.81	A+PTR	rd.catalystapps.com
8.28.67.82	A+PTR	ecsrpt.catalystapps.com
8.28.67.83	A+PTR	viewers01.catalystapps.com
8.28.67.84	A+PTR	viewers02.catalystapps.com
8.28.67.87	A+PTR	catalystrelevance.catalystapps.com
8.28.67.94	A+PTR	support.caseshare.com