Robtex

Up: 198.22.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 198.22.21.0/25
Down right: 198.22.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.22.21.8	A+PTR	ns1.mhhs.org
198.22.21.10	A	ns2.mhhs.org
198.22.21.34	A	healthsolutions.memorialhermann.org
198.22.21.34	A	houstonmovinghelp.org
198.22.21.34	A	jointpain.memorialhermann.org
198.22.21.41	A+PTR	smtp.memorialhermann.org
198.22.21.52	A+PTR	csg.mhhs.org
198.22.21.52	A	csg.f5.mhhs.org
198.22.21.95	PTR	womanhospitaltx.com
198.22.21.95	PTR	womanshospitalhouston.com
198.22.21.95	PTR	womansmemorialhermann.com
198.22.21.121	A	vdi.f5.mhhs.org
198.22.21.121	A	vdi.memorialhermann.org
198.22.21.157	A+PTR	sip.memorialhermann.org
198.22.21.163	A	chat.f5.mhhs.org
198.22.21.168	A	eclinworksftp1.f5.mhhs.org
198.22.21.180	A+PTR	f5-gtm-mc-01-extdns.mhhs.org
198.22.21.180	A+PTR	swgtm.mhhs.org
198.22.21.217	A+PTR	www.newphysicianlink.org
198.22.21.217	A+PTR	newphysicianlink.org
198.22.21.218	A	nemch.org