Robtex

Up: 173.1.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.1.64.0/21
Down right: 173.1.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.1.64.1	PTR	173.1.64.1.reverse.gogrid.com
173.1.64.2	PTR	173.1.64.2.reverse.gogrid.com
173.1.64.3	PTR	173.1.64.3.reverse.gogrid.com
173.1.64.64	PTR	173.1.64.64.reverse.gogrid.com
173.1.64.82	PTR	173.1.64.82.reverse.gogrid.com
173.1.65.2	PTR	173.1.65.2.reverse.gogrid.com
173.1.65.66	PTR	173.1.65.66.reverse.gogrid.com
173.1.65.218	A	maxoptic-usa.com
173.1.66.1	PTR	173.1.66.1.reverse.gogrid.com
173.1.66.25	A	flexhmi.com
173.1.66.25	A	mooseworkssoftware.com
173.1.66.50	A	igloocoder.net
173.1.66.66	PTR	173.1.66.66.reverse.gogrid.com
173.1.66.81	PTR	173.1.66.81.reverse.gogrid.com
173.1.66.82	PTR	173.1.66.82.reverse.gogrid.com
173.1.67.50	A+PTR	dev1.esignforms.com
173.1.67.50	A+PTR	bpndev.yozons.com
173.1.67.52	A	yozons.com
173.1.67.52	A	ssd2.yozons.com
173.1.67.82	PTR	i3pros.com
173.1.67.146	PTR	www.woodgrovebank.com
173.1.67.146	A	smtp.woodgrovebank.com
173.1.67.147	A+PTR	www.blueyonderairlines.com
173.1.67.147	A	blueyonderairlines.com
173.1.68.3	PTR	173.1.68.3.reverse.gogrid.com
173.1.68.4	A	ezlord.com
173.1.68.16	PTR	173.1.68.16.reverse.gogrid.com
173.1.68.51	PTR	173.1.68.51.reverse.gogrid.com
173.1.68.67	PTR	173.1.68.67.reverse.gogrid.com
173.1.68.83	PTR	173.1.68.83.reverse.gogrid.com
173.1.69.49	PTR	173.1.69.49.reverse.gogrid.com
173.1.69.64	PTR	173.1.69.64.reverse.gogrid.com
173.1.69.67	PTR	173.1.69.67.reverse.gogrid.com
173.1.70.1	PTR	173.1.70.1.reverse.gogrid.com
173.1.70.2	PTR	173.1.70.2.reverse.gogrid.com
173.1.70.18	PTR	logosundp.org
173.1.70.73	A	www.artistatic.com
173.1.70.73	A	the-running-chicken.com
173.1.70.73	A	dc-8120b1ef.onlinegrocer.us
173.1.70.96	PTR	173.1.70.96.reverse.gogrid.com
173.1.70.99	PTR	173.1.70.99.reverse.gogrid.com
173.1.71.2	PTR	173.1.71.2.reverse.gogrid.com
173.1.71.16	PTR	173.1.71.16.reverse.gogrid.com
173.1.71.35	PTR	173.1.71.35.reverse.gogrid.com
173.1.71.65	PTR	173.1.71.65.reverse.gogrid.com
173.1.71.82	PTR	173.1.71.82.reverse.gogrid.com
173.1.71.130	A	digitalrealtycolocation.com
173.1.71.130	A	digitalrealtycolo.com
173.1.72.19	PTR	fmanywhere.net
173.1.72.64	PTR	173.1.72.64.reverse.gogrid.com
173.1.72.99	PTR	173.1.72.99.reverse.gogrid.com
173.1.72.100	A	kern-online.dk
173.1.72.100	A	mail.kern-online.dk
173.1.72.130	A	patientswithoutborders.us
173.1.72.210	PTR	173.1.72.210.reverse.gogrid.com
173.1.72.211	PTR	173.1.72.211.reverse.gogrid.com
173.1.72.211	A	ns2.abruzzo.com.br
173.1.72.242	A	voisiteusa.com
173.1.72.242	A	mail.voisiteusa.com
173.1.73.2	PTR	173.1.73.2.reverse.gogrid.com
173.1.73.18	PTR	173.1.73.18.reverse.gogrid.com
173.1.73.66	PTR	173.1.73.66.reverse.gogrid.com
173.1.73.98	A	trunk.centermh.org
173.1.73.132	A	mail.eblib.org
173.1.73.132	A	appspot.com--stcrownroad.cn.alibaba.com
173.1.73.147	PTR	bank-up.com
173.1.73.194	PTR	topnetdata.com
173.1.73.194	A	topali.ca
173.1.73.194	A	mail.study-at-coventry.com
173.1.74.19	PTR	173.1.74.19.reverse.gogrid.com
173.1.74.82	PTR	master.wm.com
173.1.74.98	PTR	master.localdomain.com
173.1.74.99	PTR	173.1.74.99.reverse.gogrid.com
173.1.74.211	PTR	173.1.74.211.reverse.gogrid.com
173.1.74.211	A	needeat.mobi
173.1.74.211	A	need2eat.net
173.1.75.19	A	suitabilify.com
173.1.76.147	PTR	173.1.76.147.reverse.gogrid.com
173.1.76.147	A	chancetogive.org
173.1.76.147	A	chancetogive.com
173.1.76.220	A	geo.isl-proxy.net
173.1.76.220	A	groop.islonline.net
173.1.77.35	PTR	mail1.unitedcorporate.com
173.1.77.35	A+PTR	mail3.uchc.edu
173.1.78.2	A	ns2.creditcardesearch.com
173.1.78.2	A	ns2.motorrepairloans.com
173.1.78.3	PTR	173.1.78.3.reverse.gogrid.com
173.1.78.10	A	ns1.goprodns.net
173.1.78.11	A	ns2.goprodns.net
173.1.78.33	PTR	173.1.78.33.reverse.gogrid.com
173.1.78.34	PTR	173.1.78.34.reverse.gogrid.com
173.1.78.34	A	autotal.net
173.1.78.34	A	unitedverde.com
173.1.78.35	PTR	173.1.78.35.reverse.gogrid.com
173.1.79.3	A	www.xanadutec.com