Robtex

Up: 66.51.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 66.51.16.0/22
Down right: 66.51.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.51.17.154	A+PTR	owa.ironcladtek.com
66.51.17.157	A	ns1.ironcladtek.com
66.51.17.158	A	ns2.ironcladtek.com
66.51.17.220	A+PTR	ninja.ivrnet.com
66.51.17.220	A	nextext.ivrnet.com
66.51.18.59	A	www.exchangetech.ca
66.51.19.38	A	mail.canbriam.com
66.51.19.69	A	remote.progressenergy.com
66.51.19.74	A	ns1.progressenergy.com
66.51.19.75	A	calmail01.progressenergy.com
66.51.19.76	A	autodiscover.progressenergy.com
66.51.19.76	A	outlook.progressenergy.com
66.51.19.116	A	memxit.com
66.51.19.118	A	business.memoryexpress.com
66.51.19.120	A+PTR	mail.memoryexpress.com
66.51.19.121	A	memoryexpress.com
66.51.19.122	A	media.memoryexpress.com
66.51.19.126	A	abd1.memxit.com
66.51.19.149	A	crazyassholes.com
66.51.19.150	A	noc.vitalbiz.com
66.51.19.183	A	faculty180.ca
66.51.19.213	A	citrix.spyglassresources.com
66.51.19.217	A	mail.spyglassresources.com
66.51.19.235	A	calgaryhybridcloudhosting.com
66.51.19.235	A	madisonavebuilders.com
66.51.19.235	A	www.albertacancerclinicaltrials.ca
66.51.20.19	A	paymaster.ivrnet.com
66.51.21.40	A	ssi3dreality.com
66.51.21.40	A	sitevisit360.com
66.51.21.52	PTR	mail.safe-cloud.ca
66.51.21.52	A	kaseya3.fsinc.ca
66.51.21.55	A	clerc.safe-cloud.ca
66.51.21.88	A	shanghaienergycorporation.com
66.51.22.148	A+PTR	siacharts.com
66.51.22.148	A	siawm.com
66.51.22.148	A	www.siacharts.com
66.51.22.248	A	peyto.com
66.51.23.197	A	plastifab.com
66.51.23.197	A	pfbsustainability.com
66.51.23.197	A	www.advantageicf.com
66.51.23.251	A	desideratafea.com