Robtex

Up: 72.232.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.232.72.0/23
Down right: 72.232.74.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.232.72.10	A	ns1.aho-inc.org
72.232.72.11	A	ns2.aho-inc.org
72.232.72.26	PTR	ns1.monroesolutions.com
72.232.72.36	PTR	mx36.2fnet.com
72.232.72.37	PTR	monaco.dnsdc.com
72.232.72.58	A	mailgiare.com
72.232.72.58	A	ns1.minnegames.com
72.232.72.59	A	ns2.minnegames.com
72.232.72.70	PTR	mx70.ctela.com
72.232.72.72	PTR	mx72.dttel.com
72.232.72.114	PTR	114.72.232.72.static.reverse.ltdomains.com
72.232.72.146	PTR	ns2.monroesolutions.com
72.232.72.154	A	502.hostxtremplus.net
72.232.72.162	A+PTR	273.hostxtremplus.info
72.232.72.178	A+PTR	415.hostxtremplus.info
72.232.72.178	A	780.hostxtremdns.net
72.232.72.186	A+PTR	416.hostxtremplus.info
72.232.72.202	A+PTR	450.hostxtremplus.info
72.232.72.203	A	451.hostxtremplus.info
72.232.72.204	A+PTR	452.hostxtremplus.info
72.232.72.210	A+PTR	515.hostxtremplus.net
72.232.72.218	A+PTR	870.hostxtremdns.com
72.232.72.218	A	390.hostxtremplus.org
72.232.72.220	A	873.hostxtremdns.com
72.232.72.226	A	395.hostxtremplus.org
72.232.72.228	A	smtp3.muestrasgratis.es
72.232.72.229	A	smtp4.muestrasgratis.es
72.232.72.234	A	513.hostxtremplus.net
72.232.72.242	A	729.hostxtremdns.com
72.232.72.243	A	dns5.hostxtrem.info
72.232.72.244	A	dns6.hostxtrem.info
72.232.72.250	A+PTR	412.hostxtrem.info
72.232.72.251	PTR	anaitgames.com
72.232.73.2	PTR	400.hostxtremplus.org
72.232.73.2	A	mail.golfillas.com
72.232.73.10	PTR	401.hostxtremplus.com
72.232.73.10	A	mejoreshoteles.es
72.232.73.10	A	topsoftwaredownloads.com
72.232.73.12	A	402.hostxtremplus.com
72.232.73.18	A+PTR	500.hostxtremplus.net
72.232.73.26	A	510.hostxtremplus.net
72.232.73.30	A	511.hostxtremplus.net
72.232.73.34	A	512.hostxtremplus.net
72.232.73.50	A	ith-investments.com
72.232.73.50	A	521.hostxtremdns.com
72.232.73.128	A	dev.trollz.com
72.232.73.129	PTR	mp.trollz.com
72.232.73.134	PTR	134.73.232.72.static.reverse.ltdomains.com
72.232.73.134	A	mail.trollz.com
72.232.73.134	A	mail.goodlucktrolls.com
72.232.73.135	PTR	www.libertyskids.com
72.232.74.6	PTR	6.74.232.72.static.reverse.ltdomains.com
72.232.74.7	PTR	7.74.232.72.static.reverse.ltdomains.com
72.232.74.14	PTR	14.74.232.72.static.reverse.ltdomains.com
72.232.74.15	PTR	15.74.232.72.static.reverse.ltdomains.com
72.232.74.17	PTR	17.74.232.72.static.reverse.ltdomains.com
72.232.74.20	PTR	20.74.232.72.static.reverse.ltdomains.com
72.232.74.24	PTR	24.74.232.72.static.reverse.ltdomains.com
72.232.74.28	PTR	sr5.jandkdynamic.net
72.232.74.31	PTR	sr8.jandkdynamic.net
72.232.74.35	PTR	sr12.jandkdynamic.net
72.232.74.42	PTR	42.74.232.72.static.reverse.ltdomains.com
72.232.74.45	PTR	45.74.232.72.static.reverse.ltdomains.com
72.232.74.53	PTR	ns1.autodemo.com
72.232.74.54	PTR	ns2.autodemo.com
72.232.74.55	PTR	55.74.232.72.static.reverse.ltdomains.com
72.232.74.56	PTR	56.74.232.72.static.reverse.ltdomains.com
72.232.74.57	PTR	57.74.232.72.static.reverse.ltdomains.com
72.232.74.61	PTR	61.74.232.72.static.reverse.ltdomains.com
72.232.74.62	PTR	62.74.232.72.static.reverse.ltdomains.com
72.232.74.64	PTR	mx64.turndrift.com
72.232.74.66	PTR	mx66.turndrift.com
72.232.74.73	PTR	mx73.mindturn.com
72.232.74.83	PTR	mx83.theinnerspin.com
72.232.74.85	PTR	mx85.theinnerspin.com
72.232.74.86	PTR	mx86.spinmysite.com
72.232.74.87	PTR	mx87.spinmysite.com
72.232.74.89	PTR	mx89.spinmysite.com
72.232.74.90	PTR	mx90.spinmysite.com
72.232.74.96	PTR	96.74.232.72.static.reverse.ltdomains.com
72.232.74.97	PTR	97.74.232.72.static.reverse.ltdomains.com
72.232.74.98	PTR	98.74.232.72.static.reverse.ltdomains.com
72.232.74.101	PTR	101.74.232.72.static.reverse.ltdomains.com
72.232.74.104	PTR	104.74.232.72.static.reverse.ltdomains.com
72.232.74.110	PTR	110.74.232.72.static.reverse.ltdomains.com
72.232.74.112	PTR	112.74.232.72.static.reverse.ltdomains.com
72.232.74.113	PTR	113.74.232.72.static.reverse.ltdomains.com
72.232.74.115	PTR	115.74.232.72.static.reverse.ltdomains.com
72.232.74.116	PTR	116.74.232.72.static.reverse.ltdomains.com
72.232.74.119	PTR	119.74.232.72.static.reverse.ltdomains.com
72.232.74.122	PTR	122.74.232.72.static.reverse.ltdomains.com
72.232.74.128	PTR	128.74.232.72.static.reverse.ltdomains.com
72.232.74.130	PTR	130.74.232.72.static.reverse.ltdomains.com
72.232.74.131	PTR	131.74.232.72.static.reverse.ltdomains.com
72.232.74.137	PTR	137.74.232.72.static.reverse.ltdomains.com
72.232.74.138	PTR	138.74.232.72.static.reverse.ltdomains.com
72.232.74.139	PTR	139.74.232.72.static.reverse.ltdomains.com
72.232.74.141	PTR	141.74.232.72.static.reverse.ltdomains.com
72.232.74.142	PTR	142.74.232.72.static.reverse.ltdomains.com
72.232.74.150	PTR	neener.neener.org
72.232.74.151	PTR	151.74.232.72.static.reverse.ltdomains.com
72.232.74.152	PTR	152.74.232.72.static.reverse.ltdomains.com
72.232.74.154	PTR	154.74.232.72.static.reverse.ltdomains.com
72.232.74.165	PTR	165.74.232.72.static.reverse.ltdomains.com
72.232.74.170	PTR	170.74.232.72.static.reverse.ltdomains.com
72.232.74.180	A	ns1.startotal.com
72.232.74.182	PTR	182.74.232.72.static.reverse.ltdomains.com
72.232.74.188	PTR	188.74.232.72.static.reverse.ltdomains.com
72.232.74.189	PTR	189.74.232.72.static.reverse.ltdomains.com
72.232.74.193	PTR	193.74.232.72.static.reverse.ltdomains.com
72.232.74.196	PTR	superbeauty.hostinthebox.net
72.232.74.198	PTR	superbeauty.hostinthebox.net
72.232.74.202	PTR	202.74.232.72.static.reverse.ltdomains.com
72.232.74.204	PTR	204.74.232.72.static.reverse.ltdomains.com
72.232.74.205	PTR	205.74.232.72.static.reverse.ltdomains.com
72.232.74.210	PTR	210.74.232.72.static.reverse.ltdomains.com
72.232.74.217	PTR	217.74.232.72.static.reverse.ltdomains.com
72.232.74.219	PTR	219.74.232.72.static.reverse.ltdomains.com
72.232.74.223	PTR	223.74.232.72.static.reverse.ltdomains.com
72.232.74.224	PTR	224.74.232.72.static.reverse.ltdomains.com
72.232.74.226	PTR	226.74.232.72.static.reverse.ltdomains.com
72.232.74.228	PTR	228.74.232.72.static.reverse.ltdomains.com
72.232.74.234	PTR	234.74.232.72.static.reverse.ltdomains.com
72.232.74.236	PTR	236.74.232.72.static.reverse.ltdomains.com
72.232.74.238	PTR	238.74.232.72.static.reverse.ltdomains.com
72.232.74.241	PTR	241.74.232.72.static.reverse.ltdomains.com
72.232.74.243	PTR	243.74.232.72.static.reverse.ltdomains.com
72.232.74.247	PTR	247.74.232.72.static.reverse.ltdomains.com
72.232.74.251	PTR	251.74.232.72.static.reverse.ltdomains.com
72.232.75.40	PTR	mx40.buygreat.net
72.232.75.130	PTR	miami.dnsdc3.com
72.232.75.132	PTR	keywest.dnsdc7.com
72.232.75.134	A	thebodyshopgarage.com
72.232.75.139	PTR	kiev.dnsdc.com
72.232.75.139	A	ns1.lcwebservices.com
72.232.75.144	PTR	144.75.232.72.static.reverse.ltdomains.com
72.232.75.144	A	ns2.lcwebservices.com
72.232.75.160	PTR	kovcpa.com