Robtex

Up: 72.21.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 72.21.40.0/22
Down right: 72.21.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.21.40.28	A	mail.nuyouthantiaging.com
72.21.40.28	A	nuyouthantiaging.com
72.21.40.29	A	mail.nuyouthantiwrinkle.com
72.21.40.29	A	nuyouthantiwrinkle.com
72.21.40.70	A	cofcoagrigrain.com
72.21.40.74	A	agrofoyer.nl
72.21.40.74	A	*.agrofoyer.nl
72.21.40.82	PTR	82.40.21.72.ns1.cpweb.co.uk
72.21.40.82	A	ilston.com
72.21.40.218	A	tech2b.com
72.21.41.2	A	eros-atlas.de
72.21.41.2	A	finalcrew.com
72.21.41.2	A	www.final-order.org
72.21.41.3	PTR	3.41.21.72.static.reverse.ltdomains.com
72.21.41.11	PTR	11.41.21.72.static.reverse.ltdomains.com
72.21.41.69	A	ns2.goldy4host.com
72.21.41.70	A	ns1.goldy4host.com
72.21.41.98	PTR	mail.vxn.ca
72.21.41.130	A	ns1.reserveja.com.br
72.21.41.144	PTR	144.41.21.72.static.reverse.ltdomains.com
72.21.41.144	A	mypedigree.ca
72.21.41.147	A	cesar.com.mx
72.21.41.150	A	whiskas.sk
72.21.41.154	A	mail.slapcast.com
72.21.41.169	PTR	169.41.21.72.static.reverse.ltdomains.com
72.21.41.170	PTR	170.41.21.72.static.reverse.ltdomains.com
72.21.41.171	PTR	171.41.21.72.static.reverse.ltdomains.com
72.21.41.202	PTR	202.41.21.72.static.reverse.ltdomains.com
72.21.41.224	A	garciniadiettotal.com
72.21.41.224	A	mail.garciniadiettotal.com
72.21.41.225	A	auraleipurityserum.com
72.21.41.225	A	mail.auraleipurityserum.com
72.21.41.240	PTR	240.41.21.72.static.reverse.ltdomains.com
72.21.42.16	A	whiskas.lv
72.21.42.17	A	whiskas.lt
72.21.42.18	PTR	www.value-cgi.net
72.21.42.19	PTR	host1.value-cgi.net
72.21.42.19	A	catsan.it
72.21.42.20	A	elaintenpaiva.fi
72.21.42.30	A	whiskas.lu
72.21.42.30	A	actie.snickers.nl
72.21.42.32	PTR	32.42.21.72.static.reverse.ltdomains.com
72.21.42.36	A	ns2.7pe.net
72.21.42.37	A	aquarian.co.uk
72.21.42.38	A	m-ms.hu
72.21.42.41	PTR	41.42.21.72.static.reverse.ltdomains.com
72.21.42.41	A	initiativezahngesundheit.de
72.21.42.42	A	eukanuba.pr
72.21.42.42	A	eukanuba.com.mx
72.21.42.43	PTR	sphinx.adsen.com
72.21.42.45	A	snickers.sk
72.21.42.49	A	skittleswin.com
72.21.42.50	A	pondcare.net
72.21.42.50	A	apiaquarium.com
72.21.42.50	A	pond-care.com
72.21.42.56	PTR	56.42.21.72.static.reverse.ltdomains.com
72.21.42.56	A	whiskas.nl
72.21.42.57	A	hund-fragen-wissen.de
72.21.42.58	A	abccachorro.com
72.21.42.65	PTR	65.42.21.72.static.reverse.ltdomains.com
72.21.42.82	A	mail.cheap-phentermine-4u.com
72.21.42.82	A	mail.fayetteday.com
72.21.42.82	A	mail.spanam.net
72.21.42.84	A	mail.kcby.org
72.21.42.104	A	www.group.bmj.com
72.21.42.104	A	bmjgroup.com
72.21.42.104	A	eso-cdn.group.bmj.com
72.21.42.114	A	ftp.dpipe.bmjgroup.com
72.21.42.121	PTR	121.42.21.72.static.reverse.ltdomains.com
72.21.42.177	A	milionposilkow.pl
72.21.42.180	A	juicyfruitjingle.ca
72.21.42.182	A	www.mars-graduates.kz
72.21.42.242	A+PTR	search4-3.lon2.prod.sli-systems.net
72.21.43.49	A	napigw3.dev.cosocloud.com
72.21.43.65	PTR	65.43.21.72.static.reverse.ltdomains.com
72.21.43.65	A	sheba.nl
72.21.43.66	A	sheba.de
72.21.43.66	A	dns3.ax-hosting.com
72.21.43.67	A+PTR	dns4.ax-hosting.com
72.21.43.72	A	www.whiskas.hu
72.21.43.72	A	whiskas.hu
72.21.43.73	PTR	73.43.21.72.static.reverse.ltdomains.com
72.21.43.73	A	whiskas.me
72.21.43.75	PTR	75.43.21.72.static.reverse.ltdomains.com
72.21.43.75	A	whiskas.ca
72.21.43.90	PTR	ns1.serverffc.com
72.21.43.96	PTR	96.43.21.72.static.reverse.ltdomains.com
72.21.43.96	A	m-ms.com.hr
72.21.43.96	A	m-ms.rs
72.21.43.114	A	strategiesforchroniccare.com
72.21.43.114	A	morethanscleroderma.ca
72.21.43.124	A	snickers-srbija.com
72.21.43.189	A	winwithsnickers.com
72.21.43.192	A	healthyfitnessclub.com
72.21.43.192	A	mail.healthyfitnessclub.com
72.21.43.193	A	mail.completecleanseplus.com
72.21.43.193	A	completecleanseplus.com
72.21.43.195	PTR	195.43.21.72.static.reverse.ltdomains.com
72.21.43.240	A	whiskas.co.uk
72.21.43.241	PTR	241.43.21.72.static.reverse.ltdomains.com
72.21.43.241	A	www.whiskas.pl
72.21.43.241	A	whiskas.pl
72.21.43.242	PTR	rome.fluidata.com
72.21.43.242	A	sheba.ch
72.21.43.249	PTR	249.43.21.72.static.reverse.ltdomains.com
72.21.43.249	A	sheba.hu
72.21.43.250	A	dreamies-snacks.ch
72.21.43.252	A	perfect-fit.at
72.21.43.253	A	pedigree.it
72.21.44.114	A	muckrakingmoms.com
72.21.44.170	A	ns1.allarabhost.com
72.21.44.171	PTR	171.44.21.72.static.reverse.ltdomains.com
72.21.44.171	A	ns2.allarabhost.com
72.21.44.186	A	toolkit.synovate.com
72.21.45.74	PTR	ns1.magicdns.biz
72.21.45.90	PTR	90.45.21.72.static.reverse.ltdomains.com
72.21.45.90	A	ns1.vektorious.com
72.21.45.91	A	ns2.vektorious.com
72.21.45.137	PTR	137.45.21.72.static.reverse.ltdomains.com
72.21.45.137	A	sfdrmartens.com
72.21.45.178	PTR	host72.21.45.178.bluewave-network.com
72.21.45.178	A	shell.net.nz
72.21.45.202	PTR	202.45.21.72.static.reverse.ltdomains.com
72.21.45.202	A	mars-foodservice.fr
72.21.45.203	A	1in6freeicecreams.com
72.21.45.204	A	unclebens.de
72.21.45.205	A	marsverkoop.nl
72.21.45.210	PTR	210.45.21.72.static.reverse.ltdomains.com
72.21.45.210	A	airwaves.si
72.21.45.213	A	twix.lt
72.21.45.215	A	psyczykoty.pl
72.21.45.219	A	seedsofchange.co.uk
72.21.45.223	A	mars-inhousedagen.com
72.21.46.154	A	mail.planindiatrip.com
72.21.46.154	A	planindiatrip.com
72.21.46.184	PTR	184.46.21.72.static.reverse.ltdomains.com
72.21.46.212	A	ns1.hostminas.com
72.21.46.213	A	ns2.hostminas.com
72.21.46.219	A	wwweu2.dfsvenue.com
72.21.46.250	PTR	bite1.biteus.org
72.21.47.31	A	ns2.kivuli.net
72.21.47.31	A	ns2.sapphirewebdesign.co.uk
72.21.47.35	A	rhass.co.uk
72.21.47.50	A	ns9.locustworldlabs.net
72.21.47.63	A	ceptor.co.uk
72.21.47.85	A	meridiangate.co.uk
72.21.47.85	A	scrypt.co.uk