Robtex

Up: 64.81.100.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.81.100.0/25
Down right: 64.81.100.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.81.100.3	A+PTR	dsl081-100-003.den1.dsl.speakeasy.net
64.81.100.12	A+PTR	dsl081-100-012.den1.dsl.speakeasy.net
64.81.100.15	A	mail.open.edu
64.81.100.16	PTR	titanium.netizenweb.com
64.81.100.20	A+PTR	dsl081-100-020.den1.dsl.speakeasy.net
64.81.100.23	A+PTR	dsl081-100-023.den1.dsl.speakeasy.net
64.81.100.31	A+PTR	dsl081-100-031.den1.dsl.speakeasy.net
64.81.100.32	A+PTR	dsl081-100-032.den1.dsl.speakeasy.net
64.81.100.39	A+PTR	dsl081-100-039.den1.dsl.speakeasy.net
64.81.100.40	A+PTR	dsl081-100-040.den1.dsl.speakeasy.net
64.81.100.44	A+PTR	dsl081-100-044.den1.dsl.speakeasy.net
64.81.100.54	A+PTR	dsl081-100-054.den1.dsl.speakeasy.net
64.81.100.56	PTR	ns1.vansickler.net
64.81.100.65	A+PTR	dsl081-100-065.den1.dsl.speakeasy.net
64.81.100.73	A+PTR	dsl081-100-073.den1.dsl.speakeasy.net
64.81.100.74	A+PTR	dsl081-100-074.den1.dsl.speakeasy.net
64.81.100.75	A+PTR	dsl081-100-075.den1.dsl.speakeasy.net
64.81.100.78	A+PTR	dsl081-100-078.den1.dsl.speakeasy.net
64.81.100.80	A+PTR	dsl081-100-080.den1.dsl.speakeasy.net
64.81.100.82	A+PTR	dsl081-100-082.den1.dsl.speakeasy.net
64.81.100.92	A+PTR	dsl081-100-092.den1.dsl.speakeasy.net
64.81.100.93	A+PTR	dsl081-100-093.den1.dsl.speakeasy.net
64.81.100.97	A+PTR	dsl081-100-097.den1.dsl.speakeasy.net
64.81.100.100	A+PTR	dsl081-100-100.den1.dsl.speakeasy.net
64.81.100.101	PTR	dsl081-100-101.den1.dsl.speakeasy.net
64.81.100.101	A	renopages.com
64.81.100.101	A	govingle.com
64.81.100.103	A+PTR	dsl081-100-103.den1.dsl.speakeasy.net
64.81.100.105	A+PTR	dsl081-100-105.den1.dsl.speakeasy.net
64.81.100.108	A+PTR	dsl081-100-108.den1.dsl.speakeasy.net
64.81.100.114	A+PTR	dsl081-100-114.den1.dsl.speakeasy.net
64.81.100.117	A+PTR	dsl081-100-117.den1.dsl.speakeasy.net
64.81.100.120	A+PTR	dsl081-100-120.den1.dsl.speakeasy.net
64.81.100.124	A+PTR	dsl081-100-124.den1.dsl.speakeasy.net
64.81.100.127	PTR	graphite.netizenweb.com
64.81.100.131	A+PTR	dsl081-100-131.den1.dsl.speakeasy.net
64.81.100.132	PTR	bacchus.deforest.org
64.81.100.134	A+PTR	dsl081-100-134.den1.dsl.speakeasy.net
64.81.100.135	A+PTR	dsl081-100-135.den1.dsl.speakeasy.net
64.81.100.148	PTR	vintage.deforest.org
64.81.100.152	PTR	dsl081-100-152.den1.dsl.speakeasy.net
64.81.100.152	A	vidson.org
64.81.100.152	A	kendavidson.com
64.81.100.155	A+PTR	dsl081-100-155.den1.dsl.speakeasy.net
64.81.100.157	A+PTR	dsl081-100-157.den1.dsl.speakeasy.net
64.81.100.159	A+PTR	dsl081-100-159.den1.dsl.speakeasy.net
64.81.100.161	A+PTR	dsl081-100-161.den1.dsl.speakeasy.net
64.81.100.166	A+PTR	dsl081-100-166.den1.dsl.speakeasy.net
64.81.100.169	PTR	parksun01.parksun.com
64.81.100.171	A+PTR	dsl081-100-171.den1.dsl.speakeasy.net
64.81.100.175	A+PTR	dsl081-100-175.den1.dsl.speakeasy.net
64.81.100.177	A+PTR	dsl081-100-177.den1.dsl.speakeasy.net
64.81.100.181	A+PTR	dsl081-100-181.den1.dsl.speakeasy.net
64.81.100.183	A+PTR	dsl081-100-183.den1.dsl.speakeasy.net
64.81.100.184	A+PTR	dsl081-100-184.den1.dsl.speakeasy.net
64.81.100.186	A+PTR	dsl081-100-186.den1.dsl.speakeasy.net
64.81.100.187	PTR	wekelley.com
64.81.100.188	PTR	mail.cyberxape.com
64.81.100.195	A+PTR	dsl081-100-195.den1.dsl.speakeasy.net
64.81.100.196	A+PTR	dsl081-100-196.den1.dsl.speakeasy.net
64.81.100.207	A	carolynf.com
64.81.100.209	A+PTR	dsl081-100-209.den1.dsl.speakeasy.net
64.81.100.210	A+PTR	dsl081-100-210.den1.dsl.speakeasy.net
64.81.100.211	A+PTR	dsl081-100-211.den1.dsl.speakeasy.net
64.81.100.218	A+PTR	dsl081-100-218.den1.dsl.speakeasy.net
64.81.100.220	PTR	calliope.deforest.org
64.81.100.235	PTR	hank.lickey.com
64.81.100.236	A+PTR	dsl081-100-236.den1.dsl.speakeasy.net
64.81.100.239	A+PTR	dsl081-100-239.den1.dsl.speakeasy.net
64.81.100.245	A+PTR	dsl081-100-245.den1.dsl.speakeasy.net
64.81.100.246	A+PTR	dsl081-100-246.den1.dsl.speakeasy.net
64.81.100.254	A+PTR	dsl081-100-254.den1.dsl.speakeasy.net