Robtex

Up: 68.21.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.21.76.0/23
Down right: 68.21.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.21.76.151	A+PTR	68-21-76-151.ded.ameritech.net
68.21.76.162	PTR	68-21-76-162.hacd-hud.com
68.21.76.163	PTR	mail.hacd-hud.com
68.21.76.186	A	mail.mervis.com
68.21.76.186	A	mail.vermiliondevelopment.com
68.21.76.189	A	mervisadvantage.com
68.21.76.189	A	mervisadvantagerecycling.com
68.21.76.189	A	illinicastings.biz
68.21.76.213	A	restaurantequipmentdeal.com
68.21.76.218	A	68-21-76-218.ded.ameritech.net
68.21.76.221	A	68-21-76-221.ded.ameritech.net
68.21.76.226	A	gw.strata-decision.com
68.21.76.236	A	notes2.strata-decision.com
68.21.76.239	A	*.stratanetwork.com
68.21.76.239	A	demo.stratanetwork.com
68.21.78.9	PTR	adsl-68-21-78-9.ameritech.net
68.21.78.12	PTR	adsl-68-21-78-12.ameritech.net
68.21.78.13	PTR	adsl-68-21-78-13.ameritech.net
68.21.78.17	A	www.fryeclan.net
68.21.78.17	A	server.fryeclan.net
68.21.78.18	A	bandit.fryeclan.net
68.21.78.19	A	sasha.fryeclan.net
68.21.78.20	A	whisper.fryeclan.net
68.21.78.20	A	virgilio.advseo.pl
68.21.78.20	A	mail.fryeclan.net
68.21.78.21	A	galileo.fryeclan.net
68.21.78.27	PTR	adsl-68-21-78-27.ameritech.net
68.21.78.44	PTR	adsl-68-21-78-44.ameritech.net
68.21.78.48	PTR	adsl-68-21-78-48.ameritech.net
68.21.78.58	PTR	adsl-68-21-78-58.ameritech.net
68.21.78.66	PTR	adsl-68-21-78-66.ameritech.net
68.21.78.73	PTR	adsl-68-21-78-73.ameritech.net
68.21.78.81	PTR	adsl-68-21-78-81.ameritech.net
68.21.78.104	PTR	adsl-68-21-78-104.ameritech.net
68.21.78.107	PTR	adsl-68-21-78-107.ameritech.net
68.21.78.113	PTR	adsl-68-21-78-113.ameritech.net
68.21.78.118	PTR	adsl-68-21-78-118.ameritech.net
68.21.78.119	PTR	adsl-68-21-78-119.ameritech.net
68.21.78.129	PTR	adsl-68-21-78-129.ameritech.net
68.21.78.132	PTR	adsl-68-21-78-132.ameritech.net
68.21.78.133	PTR	adsl-68-21-78-133.ameritech.net
68.21.78.135	PTR	adsl-68-21-78-135.ameritech.net
68.21.78.136	PTR	adsl-68-21-78-136.ameritech.net
68.21.78.145	PTR	adsl-68-21-78-145.ameritech.net
68.21.78.150	PTR	adsl-68-21-78-150.ameritech.net
68.21.78.158	PTR	adsl-68-21-78-158.ameritech.net
68.21.78.159	PTR	adsl-68-21-78-159.ameritech.net
68.21.78.161	PTR	adsl-68-21-78-161.ameritech.net
68.21.78.161	A	bigballofmud.com
68.21.78.161	A	zaramama.org
68.21.78.163	PTR	adsl-68-21-78-163.ameritech.net
68.21.78.168	PTR	adsl-68-21-78-168.ameritech.net
68.21.78.175	PTR	adsl-68-21-78-175.ameritech.net
68.21.78.177	PTR	adsl-68-21-78-177.ameritech.net
68.21.78.185	PTR	adsl-68-21-78-185.ameritech.net
68.21.78.192	PTR	adsl-68-21-78-192.ameritech.net
68.21.78.195	PTR	adsl-68-21-78-195.ameritech.net
68.21.78.196	PTR	adsl-68-21-78-196.ameritech.net
68.21.78.203	PTR	adsl-68-21-78-203.ameritech.net
68.21.78.204	PTR	adsl-68-21-78-204.ameritech.net
68.21.78.211	PTR	adsl-68-21-78-211.chinafriendclub.com
68.21.78.214	PTR	adsl-68-21-78-214.chinafriendclub.com
68.21.78.217	PTR	adsl-68-21-78-217.ameritech.net
68.21.78.227	PTR	adsl-68-21-78-227.ameritech.net
68.21.78.249	PTR	adsl-68-21-78-249.ameritech.net
68.21.79.3	A+PTR	adsl-68-21-79-3.dsl.chmpil.ameritech.net
68.21.79.17	A+PTR	adsl-68-21-79-17.dsl.chmpil.ameritech.net
68.21.79.20	A+PTR	adsl-68-21-79-20.dsl.chmpil.ameritech.net
68.21.79.23	A+PTR	adsl-68-21-79-23.dsl.chmpil.ameritech.net
68.21.79.28	PTR	adsl-68-21-79-28.basementexpert.com
68.21.79.50	A+PTR	adsl-68-21-79-50.dsl.chmpil.ameritech.net
68.21.79.54	A+PTR	adsl-68-21-79-54.dsl.chmpil.ameritech.net
68.21.79.55	A+PTR	adsl-68-21-79-55.dsl.chmpil.ameritech.net
68.21.79.62	A+PTR	adsl-68-21-79-62.dsl.chmpil.ameritech.net
68.21.79.63	A+PTR	adsl-68-21-79-63.dsl.chmpil.ameritech.net
68.21.79.76	A+PTR	adsl-68-21-79-76.dsl.chmpil.ameritech.net
68.21.79.78	A+PTR	adsl-68-21-79-78.dsl.chmpil.ameritech.net
68.21.79.97	A+PTR	adsl-68-21-79-97.dsl.chmpil.ameritech.net
68.21.79.101	A+PTR	adsl-68-21-79-101.dsl.chmpil.ameritech.net
68.21.79.117	A+PTR	adsl-68-21-79-117.dsl.chmpil.ameritech.net
68.21.79.131	A+PTR	adsl-68-21-79-131.dsl.chmpil.ameritech.net
68.21.79.157	A	mail.danvillemetal.com
68.21.79.169	A+PTR	adsl-68-21-79-169.dsl.chmpil.ameritech.net
68.21.79.176	A+PTR	adsl-68-21-79-176.dsl.chmpil.ameritech.net
68.21.79.185	A+PTR	adsl-68-21-79-185.dsl.chmpil.ameritech.net
68.21.79.195	A+PTR	adsl-68-21-79-195.dsl.chmpil.ameritech.net
68.21.79.206	A+PTR	adsl-68-21-79-206.dsl.chmpil.ameritech.net
68.21.79.224	A+PTR	adsl-68-21-79-224.dsl.chmpil.ameritech.net
68.21.79.225	A+PTR	adsl-68-21-79-225.dsl.chmpil.ameritech.net
68.21.79.236	A+PTR	adsl-68-21-79-236.dsl.chmpil.ameritech.net
68.21.79.243	A+PTR	adsl-68-21-79-243.dsl.chmpil.ameritech.net
68.21.79.244	A+PTR	adsl-68-21-79-244.dsl.chmpil.ameritech.net
68.21.79.248	A+PTR	adsl-68-21-79-248.dsl.chmpil.ameritech.net
68.21.79.249	A+PTR	adsl-68-21-79-249.dsl.chmpil.ameritech.net
68.21.79.251	A+PTR	adsl-68-21-79-251.dsl.chmpil.ameritech.net
68.21.79.253	A+PTR	adsl-68-21-79-253.dsl.chmpil.ameritech.net