Robtex

Up: 72.15.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.15.52.0/23
Down right: 72.15.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.15.52.34	A	mail1.dpptoronto.com
72.15.52.210	A	removemyname.ca
72.15.53.4	PTR	navedge01.navantis.com
72.15.53.5	PTR	navedge02.navantis.com
72.15.53.10	A	navantisoncloud.com
72.15.53.10	A	peopleworkscrm.com
72.15.53.10	A	www.navantis.com
72.15.53.13	A	navedge01.navantis.com
72.15.53.14	A	navedge02.navantis.com
72.15.53.19	A	dolphin-software.com
72.15.53.19	A	navantisonline.com
72.15.53.43	A	dolphin-software.com
72.15.53.51	A	smhpa.ca
72.15.53.52	A	peopleworkscrm.com
72.15.54.36	A	mail.nbs-enb.ca
72.15.54.82	A	fw.shareowner.com
72.15.54.83	A	mail.shareowner.com
72.15.54.86	A	shareowner.com
72.15.54.86	A	www.shareowner.com
72.15.54.104	A	truition.co.uk
72.15.54.104	A	truition.ca
72.15.54.144	A	taylim.ca
72.15.54.162	A+PTR	email.fnlawyers.com
72.15.54.162	A	mail.fnlawyers.com
72.15.54.170	A	hellounclebob.com
72.15.54.170	A	byulab.com
72.15.54.170	A	ns1.brainstormlab.com
72.15.54.197	A	mail.facesharing.com
72.15.54.197	A	futurmillionnaire.com
72.15.54.197	A	facesharing.com
72.15.54.199	PTR	72-15-54-199.beanfield.net
72.15.54.199	A	fbot.ca
72.15.54.214	A+PTR	bangin.unixsluts.com
72.15.54.215	PTR	asciipr0n.com
72.15.54.216	PTR	unixadmin.ca
72.15.54.216	A	dns.chicks-dig-unix.net
72.15.54.216	A	*.chicks-dig-unix.net
72.15.54.221	A	mail.sundancehome.com
72.15.54.221	A	mail.sundancehomes.ca
72.15.54.222	A	ns2.mohsho.ca
72.15.54.222	A	ns2.mohsho.com
72.15.54.223	PTR	mail.mohsho.com
72.15.54.225	PTR	ns1.rdcomp.ca
72.15.54.225	A	mail.auriga.on.ca
72.15.54.228	A	01systemstudio.com
72.15.54.228	A	ghettocyb.org
72.15.54.228	A	blackpixelrecords.com
72.15.54.234	PTR	vps3.mohsho.com
72.15.54.234	A	proxasystems.com
72.15.54.234	A	shorebatmitzvah.com
72.15.54.247	A	ns4.mohsho.com
72.15.54.247	A	csbbcs.org
72.15.54.247	A	www.csbbcs.org
72.15.55.42	A	upincstudio.ca
72.15.55.42	A	gsbranding.net
72.15.55.53	A	cookbruk.com
72.15.55.82	A	antispam.tng.ca
72.15.55.101	A	gtsystemmonitor.com
72.15.55.115	A+PTR	rainbow.cubearmy.com
72.15.55.115	A	dns.rydiumnetwork.com
72.15.55.139	A	cmcfaculty.com
72.15.55.148	A	ecclesiastical.ca
72.15.55.148	A	eccles-ins.com
72.15.55.149	A	northamrealty.net
72.15.55.149	A	northamrealty.org
72.15.55.152	A+PTR	webmail.quartetmail.com
72.15.55.155	A+PTR	mail01.quartetmail.com
72.15.55.156	A	stonewebcasts.com
72.15.55.195	A	issa-rp.com
72.15.55.230	A	mail.amw3000.com
72.15.55.235	A	mail.bedrocan.ca