Robtex

Up: 64.21.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.21.240.0/22
Down right: 64.21.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.21.242.3	A+PTR	ip-64-21-242-3.far.ideaone.net
64.21.242.16	A+PTR	ip-64-21-242-16.far.ideaone.net
64.21.242.17	A+PTR	ip-64-21-242-17.far.ideaone.net
64.21.242.18	A+PTR	ip-64-21-242-18.far.ideaone.net
64.21.242.24	A+PTR	ip-64-21-242-24.far.ideaone.net
64.21.242.27	A+PTR	ip-64-21-242-27.far.ideaone.net
64.21.242.32	A+PTR	ip-64-21-242-32.far.ideaone.net
64.21.242.33	A+PTR	ip-64-21-242-33.far.ideaone.net
64.21.242.39	A	ip-64-21-242-39.far.ideaone.net
64.21.242.40	A+PTR	ip-64-21-242-40.far.ideaone.net
64.21.242.47	A	ip-64-21-242-47.far.ideaone.net
64.21.242.50	A+PTR	ip-64-21-242-50.far.ideaone.net
64.21.242.59	A+PTR	ip-64-21-242-59.far.ideaone.net
64.21.242.66	A+PTR	ip-64-21-242-66.far.ideaone.net
64.21.242.71	A	ip-64-21-242-71.far.ideaone.net
64.21.242.73	A+PTR	ip-64-21-242-73.far.ideaone.net
64.21.242.74	PTR	ip-64-21-242-74.far.ideaone.net
64.21.242.76	A	ip-64-21-242-76.far.ideaone.net
64.21.242.77	A	ip-64-21-242-77.far.ideaone.net
64.21.242.78	A	ip-64-21-242-78.far.ideaone.net
64.21.242.84	A	ip-64-21-242-84.far.ideaone.net
64.21.242.87	A	ip-64-21-242-87.far.ideaone.net
64.21.242.110	A	ip-64-21-242-110.far.ideaone.net
64.21.242.111	A	ip-64-21-242-111.far.ideaone.net
64.21.242.117	A	ip-64-21-242-117.far.ideaone.net
64.21.242.129	A+PTR	ip-64-21-242-129.far.ideaone.net
64.21.242.139	A+PTR	ip-64-21-242-139.far.ideaone.net
64.21.242.147	A+PTR	ip-64-21-242-147.far.ideaone.net
64.21.242.149	A	ip-64-21-242-149.far.ideaone.net
64.21.242.155	PTR	mail.thecomputerplace.com
64.21.242.156	A	ip-64-21-242-156.far.ideaone.net
64.21.242.159	A	ip-64-21-242-159.far.ideaone.net
64.21.242.165	A	ip-64-21-242-165.far.ideaone.net
64.21.242.167	A	ip-64-21-242-167.far.ideaone.net
64.21.242.190	A	ip-64-21-242-190.far.ideaone.net
64.21.242.191	A	ip-64-21-242-191.far.ideaone.net
64.21.242.192	A+PTR	ip-64-21-242-192.far.ideaone.net
64.21.242.195	A+PTR	ip-64-21-242-195.far.ideaone.net
64.21.242.200	A+PTR	ip-64-21-242-200.far.ideaone.net
64.21.242.202	A+PTR	ip-64-21-242-202.far.ideaone.net
64.21.242.204	A	ip-64-21-242-204.far.ideaone.net
64.21.242.217	A+PTR	ip-64-21-242-217.far.ideaone.net
64.21.242.218	A+PTR	ip-64-21-242-218.far.ideaone.net
64.21.242.221	A	ip-64-21-242-221.far.ideaone.net
64.21.242.254	A	ip-64-21-242-254.far.ideaone.net
64.21.243.90	A+PTR	ip-64-21-243-90.far.ideaone.net
64.21.243.200	PTR	ip-64-21-243-200.far.ideaone.net
64.21.244.1	A+PTR	ip-64-21-244-1.far.ideaone.net
64.21.244.2	A+PTR	ip-64-21-244-2.far.ideaone.net
64.21.244.3	A+PTR	ip-64-21-244-3.far.ideaone.net
64.21.244.4	A	ip-64-21-244-4.far.ideaone.net
64.21.244.12	A	ip-64-21-244-12.far.ideaone.net
64.21.244.17	A+PTR	ip-64-21-244-17.far.ideaone.net
64.21.244.20	A	ip-64-21-244-20.far.ideaone.net
64.21.244.38	A	ip-64-21-244-38.far.ideaone.net
64.21.244.39	A	ip-64-21-244-39.far.ideaone.net
64.21.244.40	A+PTR	ip-64-21-244-40.far.ideaone.net
64.21.244.53	A	ip-64-21-244-53.far.ideaone.net
64.21.244.60	A	ip-64-21-244-60.far.ideaone.net
64.21.244.62	A	ip-64-21-244-62.far.ideaone.net
64.21.244.63	A	ip-64-21-244-63.far.ideaone.net
64.21.244.66	A+PTR	ip-64-21-244-66.far.ideaone.net
64.21.244.71	A	ip-64-21-244-71.far.ideaone.net
64.21.244.72	A+PTR	ip-64-21-244-72.far.ideaone.net
64.21.244.74	A+PTR	ip-64-21-244-74.far.ideaone.net
64.21.244.75	A+PTR	ip-64-21-244-75.far.ideaone.net
64.21.244.77	A	ip-64-21-244-77.far.ideaone.net
64.21.244.86	A	ip-64-21-244-86.far.ideaone.net
64.21.244.90	A+PTR	ip-64-21-244-90.far.ideaone.net
64.21.244.94	A	ip-64-21-244-94.far.ideaone.net
64.21.244.103	A	ip-64-21-244-103.far.ideaone.net
64.21.244.104	A+PTR	ip-64-21-244-104.far.ideaone.net
64.21.244.108	A	ip-64-21-244-108.far.ideaone.net
64.21.244.114	A+PTR	ip-64-21-244-114.far.ideaone.net
64.21.244.116	A	ip-64-21-244-116.far.ideaone.net
64.21.244.122	A+PTR	ip-64-21-244-122.far.ideaone.net
64.21.244.123	A+PTR	ip-64-21-244-123.far.ideaone.net
64.21.244.125	A	ip-64-21-244-125.far.ideaone.net
64.21.244.132	A	ip-64-21-244-132.far.ideaone.net
64.21.244.133	A	ip-64-21-244-133.far.ideaone.net
64.21.244.134	A	ip-64-21-244-134.far.ideaone.net
64.21.244.143	A	ip-64-21-244-143.far.ideaone.net
64.21.244.146	A+PTR	ip-64-21-244-146.far.ideaone.net
64.21.244.150	A	ip-64-21-244-150.far.ideaone.net
64.21.244.167	A	ip-64-21-244-167.far.ideaone.net
64.21.244.171	A+PTR	ip-64-21-244-171.far.ideaone.net
64.21.244.172	A	ip-64-21-244-172.far.ideaone.net
64.21.244.177	A+PTR	ip-64-21-244-177.far.ideaone.net
64.21.244.198	A	ip-64-21-244-198.far.ideaone.net
64.21.244.204	A	ip-64-21-244-204.far.ideaone.net
64.21.244.206	A	ip-64-21-244-206.far.ideaone.net
64.21.244.207	A	ip-64-21-244-207.far.ideaone.net
64.21.244.210	A+PTR	ip-64-21-244-210.far.ideaone.net
64.21.244.211	A+PTR	ip-64-21-244-211.far.ideaone.net
64.21.244.214	A	ip-64-21-244-214.far.ideaone.net
64.21.244.232	A+PTR	ip-64-21-244-232.far.ideaone.net
64.21.244.239	A	ip-64-21-244-239.far.ideaone.net
64.21.244.241	A+PTR	ip-64-21-244-241.far.ideaone.net
64.21.244.245	A	ip-64-21-244-245.far.ideaone.net
64.21.244.246	A	ip-64-21-244-246.far.ideaone.net
64.21.244.252	A	ip-64-21-244-252.far.ideaone.net
64.21.245.2	PTR	mail.satshot.com
64.21.245.2	A	mail.agriimagis.com
64.21.245.9	A	psychiatrynetworks.com
64.21.245.9	A	psychianet.com
64.21.245.18	PTR	hekla.satshot.com
64.21.245.19	PTR	satshot.com
64.21.245.34	A	mail.paradiso.com
64.21.245.35	A	ideaone-245-35.ideaone.net
64.21.245.49	PTR	exchange.odayequipment.com
64.21.245.49	A	ideaone-245-49.ideaone.net
64.21.245.57	A	ideaone-245-57.ideaone.net
64.21.245.71	A	mail01.ryanpotato.com
64.21.245.71	A	smtp.rdoequipment.com
64.21.245.71	A	mx.bbrental.com
64.21.245.78	A	topconca.com
64.21.245.78	A	triplewequipment.com
64.21.245.78	A	rdocaterstaters.com
64.21.245.84	A	rdomail.rdoequipment.com
64.21.245.85	A	ip-64-21-245-85.far.ideaone.net
64.21.245.86	A	topconca.com
64.21.245.86	A	bbequipmentrental.com
64.21.245.98	A	ideaone-245-98.ideaone.net
64.21.245.101	A	voip.ideaone.net
64.21.245.114	PTR	ip-64-21-245-114.far.ideaone.net
64.21.245.137	PTR	cp.northstar-tg.com
64.21.245.137	A	ns2.northstarpolygraph.net
64.21.245.137	A	northstarpolygraph.net
64.21.245.144	A	fcmcitrix.northstar-tg.com
64.21.245.145	A+PTR	filter01.northstar-tg.com
64.21.245.146	A+PTR	filter02.northstar-tg.com
64.21.245.150	A	mail.bradferdassociates.com
64.21.245.154	A	ppo.payrollproinc.com
64.21.245.156	A	mail.northstar-tg.com
64.21.245.156	A	ntgexchange.com
64.21.245.175	A	secure.trackinfo.com
64.21.245.182	A	viphorseplayer.com
64.21.245.196	A	playfanex.com
64.21.245.196	A	fanattle.com
64.21.245.196	A	fanex.com
64.21.245.235	A	mail.sunderlandgroup.com
64.21.245.251	A	mail.avenueright.com
64.21.245.253	A	avenueright.net
64.21.246.15	A	ip-64-21-246-15.far.ideaone.net
64.21.246.16	A+PTR	ip-64-21-246-16.far.ideaone.net
64.21.246.20	A	ip-64-21-246-20.far.ideaone.net
64.21.246.59	A+PTR	ip-64-21-246-59.far.ideaone.net
64.21.246.89	A+PTR	ip-64-21-246-89.far.ideaone.net
64.21.246.111	A	ip-64-21-246-111.far.ideaone.net
64.21.246.117	A	ip-64-21-246-117.far.ideaone.net
64.21.246.134	A	ip-64-21-246-134.far.ideaone.net
64.21.246.142	A	ip-64-21-246-142.far.ideaone.net
64.21.246.148	A	ip-64-21-246-148.far.ideaone.net
64.21.246.157	A	ip-64-21-246-157.far.ideaone.net
64.21.246.165	A	ip-64-21-246-165.far.ideaone.net
64.21.246.176	A+PTR	ip-64-21-246-176.far.ideaone.net
64.21.246.190	A	ip-64-21-246-190.far.ideaone.net
64.21.246.211	A+PTR	ip-64-21-246-211.far.ideaone.net
64.21.246.212	A	ip-64-21-246-212.far.ideaone.net
64.21.246.234	A+PTR	ip-64-21-246-234.far.ideaone.net
64.21.246.240	A+PTR	ip-64-21-246-240.far.ideaone.net
64.21.246.244	A	ip-64-21-246-244.far.ideaone.net
64.21.247.14	A	mail.midwesttestinglabs.com
64.21.247.16	A+PTR	ip-64-21-247-16.far.ideaone.net
64.21.247.16	A	mail.redriv.com
64.21.247.17	A	mail.sunbutter.com
64.21.247.17	A	redriver-vaneck.nl
64.21.247.74	A+PTR	ip-64-21-247-74.far.ideaone.net
64.21.247.76	A	ip-64-21-247-76.far.ideaone.net
64.21.247.89	A+PTR	mail.gjesdahllaw.com
64.21.247.89	A	mail.gjesdahlfamilylaw.com
64.21.247.89	A	mail.fmfamilylawyers.com