Robtex

Up: 72.20.38.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.20.38.0/25
Down right: 72.20.38.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.20.38.4	PTR
72.20.38.9	PTR
72.20.38.11	PTR
72.20.38.24	PTR	gm-gen.ru
72.20.38.25	PTR
72.20.38.27	PTR	sibirdosug.com
72.20.38.29	PTR
72.20.38.29	A	empfinance.org
72.20.38.34	PTR
72.20.38.50	PTR	p4r4d0x.net
72.20.38.55	PTR	murderface.org
72.20.38.61	A	dss.d1sh.org
72.20.38.78	PTR
72.20.38.78	A	skinny.blondes.withbig.tits.need.toungeaction.com
72.20.38.79	PTR
72.20.38.79	A	p.zzap.me
72.20.38.99	PTR	72.20.38.99.staminus.net
72.20.38.99	A	foolweasel.master.vg
72.20.38.102	PTR
72.20.38.102	A	morphforest.com
72.20.38.119	PTR
72.20.38.130	PTR
72.20.38.130	A	omfgwtfbbq.org
72.20.38.132	PTR	saved.his.porno.to.dvdrdrive.com
72.20.38.134	PTR
72.20.38.134	A	pgpmail.biz
72.20.38.134	A	mail1.digitalguard.biz
72.20.38.135	PTR	72.20.38.135.staminus.net
72.20.38.135	A	brycerahim.com
72.20.38.135	A	www.brycerahim.com
72.20.38.137	A+PTR	freedns2.registrar-servers.com
72.20.38.137	A	ns1.pokwa.net
72.20.38.137	A	ns2.hizzacked.com
72.20.38.138	PTR	dns5-5.registrar-servers.com
72.20.38.140	PTR	dns5-5.registrar-servers.com
72.20.38.146	PTR
72.20.38.147	PTR
72.20.38.147	A	behind.proxysocket.com
72.20.38.148	PTR
72.20.38.148	A	protected.proxysocket.com
72.20.38.161	PTR
72.20.38.162	PTR
72.20.38.170	PTR
72.20.38.194	PTR	punya.pacar.yang.sangat.perhatian.co.cc
72.20.38.202	PTR	power.puff.g1rl.in
72.20.38.218	PTR	own.a.lot.of.girl.from.vietnam.ro
72.20.38.229	PTR	cewek.cut3.in
72.20.38.239	PTR	nd.psybnc.org
72.20.38.246	PTR	lord.org.in