Robtex

Up: 72.2.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.2.52.0/23
Down right: 72.2.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.2.52.3	PTR	h72-2-52-3.bigpipeinc.com
72.2.52.6	PTR	h72-2-52-6.bigpipeinc.com
72.2.52.69	PTR	h72-2-52-69.bigpipeinc.com
72.2.52.70	A	expressway-e.escautomation.com
72.2.52.84	A	gateway.escautomation.com
72.2.52.102	PTR	h72-2-52-102.bigpipeinc.com
72.2.52.102	A	escautomation.com
72.2.52.102	A	portal.escautomation.com
72.2.52.107	PTR	h72-2-52-107.bigpipeinc.com
72.2.52.107	A	realisebuildingpotential.com
72.2.52.107	A	realizebuildingpotential.com
72.2.52.108	PTR	h72-2-52-108.bigpipeinc.com
72.2.52.108	A	cucube-updates.coppertreeanalytics.com
72.2.52.111	PTR	h72-2-52-111.bigpipeinc.com
72.2.52.116	A	patriot-energy.com
72.2.52.177	PTR	h72-2-52-177.bigpipeinc.com
72.2.52.202	A	glenlyon.dyndns-home.com
72.2.52.216	PTR	h72-2-52-216.bigpipeinc.com
72.2.52.254	PTR	h72-2-52-254.bigpipeinc.com
72.2.53.3	PTR	h72-2-53-3.bigpipeinc.com
72.2.53.3	A	mail2.rew.ca
72.2.53.4	A	mail.rew.ca
72.2.53.30	A	exchange.yellowpandait.com
72.2.53.34	A+PTR	exchange.holditall.com
72.2.53.34	A	primary.greatpanther.com
72.2.53.34	A	mail.greatpanther.com
72.2.53.44	A+PTR	mail.pwbsglobal.com
72.2.53.44	A	office.pwbsglobal.com
72.2.53.44	A	mail.thepaymentservices.com
72.2.53.66	PTR	h72-2-53-66.bigpipeinc.com
72.2.53.66	A	owa.mulgrave.com
72.2.53.84	A	mail.tekmira.com
72.2.53.84	A	mail.tekmirapharm.com
72.2.53.86	PTR	h72-2-53-86.bigpipeinc.com
72.2.53.98	PTR	h72-2-53-98.bigpipeinc.com
72.2.53.98	A	autodiscover.houle.ca
72.2.53.99	A+PTR	houleelectric.com
72.2.53.99	A+PTR	downloads.houle.ca
72.2.53.99	A+PTR	ftp.houle.ca
72.2.53.100	PTR	h72-2-53-100.bigpipeinc.com
72.2.53.100	A	mail.houleelectric.com
72.2.53.115	PTR	h72-2-53-115.bigpipeinc.com
72.2.53.115	A	mail.iyinisiw.com
72.2.53.115	A	webmail.iyinisiw.com
72.2.53.116	PTR	h72-2-53-116.bigpipeinc.com
72.2.53.116	A	support.fitwacc.net
72.2.53.118	A	ux1.vidc.bc.ca.fitwacc.net
72.2.53.147	PTR	h72-2-53-147.bigpipeinc.com
72.2.53.147	A	callcenteraward.com
72.2.53.147	A	www.sqmgroup.com
72.2.53.170	PTR	h72-2-53-170.bigpipeinc.com
72.2.53.170	A	quest-mail.com
72.2.53.170	A	ionicmail.com
72.2.53.178	PTR	cometcomputing.com
72.2.53.204	A+PTR	gbmail.gourmetbaker.com
72.2.53.242	A	srv3.mercana.com
72.2.54.0	PTR	mail.arcteryx.com
72.2.54.4	PTR	mail.arcteryx.com
72.2.54.5	PTR	h72-2-54-5.arcteryx.com
72.2.54.40	A+PTR	ana.yourlibrary.ca
72.2.54.40	A	ana.rpl.richmond.bc.ca
72.2.54.45	A+PTR	cns2.yourlibrary.ca
72.2.54.55	PTR	ns2.yourlibrary.ca
72.2.54.75	PTR	h72-2-54-75.bigpipeinc.com
72.2.54.75	A	autodiscover.joeyrestaurants.com
72.2.54.75	A	owa.joeyrestaurants.com
72.2.54.80	PTR	h72-2-54-80.bigpipeinc.com
72.2.54.80	A	ftpupload.joeyrestaurants.com
72.2.54.81	PTR	h72-2-54-81.bigpipeinc.com
72.2.54.115	PTR	mail.yokohama.ca
72.2.54.116	A+PTR	mail1.yokohamatire.ca
72.2.54.116	A	mail.yokohama.ca
72.2.54.116	A	mail.yokohamatire.ca
72.2.54.117	PTR	h72-2-54-117.bigpipeinc.com
72.2.54.117	A	yokonet.ca
72.2.54.140	A	calvpn1.nexeninc.com
72.2.54.162	A+PTR	mail.rainmaker.com
72.2.54.162	A	wale.mainframe.ca
72.2.54.162	A	atlantis.rainmaker.com
72.2.54.165	A	ftp.rainmaker.com
72.2.54.166	A+PTR	rainmaker.ca
72.2.54.166	A+PTR	rainmakerentertainment.com
72.2.54.166	PTR	www.rainmaker.ca
72.2.54.171	PTR	h72-2-54-171.bigpipeinc.com
72.2.54.171	A	mailmx.rainmaker.com
72.2.54.188	A	nonym.rainmaker.com
72.2.54.188	A	webmail.rainmaker.com
72.2.54.188	A	imap.rainmaker.com
72.2.54.189	A	vpn.rainmaker.com
72.2.54.205	PTR	mx1.svarog.ca
72.2.55.65	A+PTR	mail.questu.ca
72.2.55.65	A	qvm-smtp1.questu.ca
72.2.55.69	A	barracuda.questu.ca
72.2.55.72	PTR	h72-2-55-72.bigpipeinc.com
72.2.55.72	A	webmail.questu.ca
72.2.55.75	A	donatetoquest.com
72.2.55.97	PTR	h72-2-55-97.bigpipeinc.com
72.2.55.97	A	switch.navarik.com
72.2.55.130	PTR	h72-2-55-130.bigpipeinc.com
72.2.55.130	A	webdns-1.silvernet.ca
72.2.55.131	A+PTR	mail.silvernetworks.ca
72.2.55.131	A	silvernet.ca
72.2.55.131	A	mail.westexpress.ca
72.2.55.133	PTR	h72-2-55-133.bigpipeinc.com
72.2.55.133	A	mail.silvernet.ca
72.2.55.137	PTR	h72-2-55-137.bigpipeinc.com
72.2.55.137	A	mail.amherstvethospital.com
72.2.55.144	A	mx.galaxyplastics.com
72.2.55.146	PTR	h72-2-55-146.bigpipeinc.com
72.2.55.146	A	mail.computerworks.ca
72.2.55.146	A	mail.computerworks.bc.ca
72.2.55.149	PTR	h72-2-55-149.bigpipeinc.com
72.2.55.149	A	mail.phoenixglassinc.com
72.2.55.151	A	mail.creativeenergycanada.com
72.2.55.157	A	webdns-2.silvernet.ca
72.2.55.168	PTR	remote.ldcu.ca
72.2.55.227	PTR	host72-2-55-227.conair.ca
72.2.55.227	A	dcddesign.com
72.2.55.231	PTR	fml.conair.ca
72.2.55.243	PTR	host-72-2-55-243.conair.ca
72.2.55.243	A	chamberlainspring.com
72.2.55.243	A	summaimages.com
72.2.55.244	PTR	host-72-2-55-244.conair.ca
72.2.55.244	A	nationalimporters.com
72.2.55.245	A	powershopper.com
72.2.55.253	PTR	host-72-2-55-253.conair.ca
72.2.55.253	A	mail.powershopper.com
72.2.55.253	A	mail.dragon-leaf.com