Robtex

Up: 173.1.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.1.144.0/21
Down right: 173.1.152.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.1.144.0	PTR	173.1.144.0.reverse.gogrid.com
173.1.144.242	PTR	173.1.144.242.reverse.gogrid.com
173.1.145.100	A	ada.tactika.com
173.1.145.100	A	tactika.com
173.1.145.100	A	ecommerce-101.com
173.1.145.114	PTR	cloud.technossus.com
173.1.145.114	A	wescrum.com
173.1.146.2	PTR	173.1.146.2.reverse.gogrid.com
173.1.147.3	PTR	173.1.147.3.reverse.gogrid.com
173.1.148.34	PTR	173.1.148.34.reverse.gogrid.com
173.1.148.34	A	tryixus.com
173.1.148.35	PTR	emssixus.com
173.1.148.35	A	getixus.com
173.1.149.2	PTR	173.1.149.2.reverse.gogrid.com
173.1.149.27	A	1o1.biz
173.1.150.1	PTR	173.1.150.1.reverse.gogrid.com
173.1.150.2	PTR	173.1.150.2.reverse.gogrid.com
173.1.150.53	A	mail.nitrocloud.net
173.1.150.53	A	nitrocloud.net
173.1.150.90	A	freecarbids.com
173.1.150.92	A	saintjeorgetrust.org
173.1.150.92	A	zettaspatial.com
173.1.150.92	A	sklawassociate.com
173.1.150.146	PTR	getpaidsurveys.com
173.1.150.146	A	www.wholookingforme.com
173.1.150.146	A	mail.creditcard-default.com
173.1.152.0	PTR	173.1.152.0.reverse.gogrid.com
173.1.152.171	A	dev.petblvd.com
173.1.153.2	PTR	173.1.153.2.reverse.gogrid.com
173.1.154.0	PTR	173.1.154.0.reverse.gogrid.com
173.1.155.164	A	ns1.mrmusica.com
173.1.155.164	A	www.latinoemgoldex.com
173.1.155.164	A	mail.comprascocoas.net
173.1.156.3	PTR	servers.evilchat.net
173.1.156.178	A	mailex.cardomain.com
173.1.156.242	PTR	173.1.156.242.reverse.gogrid.com
173.1.156.242	A	rtlsjournal.com
173.1.156.242	A	findjobsnear.com
173.1.157.34	PTR	tennisdrills.tv
173.1.157.35	A	*.hmievents.com
173.1.157.35	A	hmievents.com
173.1.157.35	A	www.hmievents.com
173.1.157.42	A	gfsevents.com
173.1.157.162	A	mail.practiceprogram.org
173.1.157.162	A	practiceprogram.org
173.1.158.99	A	mdyantra.com
173.1.158.99	A	www.mdyantra.com
173.1.158.99	A	xerung.com
173.1.159.1	PTR	173.1.159.1.reverse.gogrid.com
173.1.159.53	A	ads1.encuentra24.com