Robtex

Up: 68.249.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.249.40.0/23
Down right: 68.249.42.0/23

IP	Type	Hostname
68.249.42.4	PTR	adsl-68-249-42-4.dsl.sgnwmi.ameritech.net
68.249.42.11	PTR	adsl-68-249-42-11.dsl.sgnwmi.ameritech.net
68.249.42.12	PTR	adsl-68-249-42-12.dsl.sgnwmi.ameritech.net
68.249.42.13	PTR	adsl-68-249-42-13.dsl.sgnwmi.ameritech.net
68.249.42.14	PTR	adsl-68-249-42-14.dsl.sgnwmi.ameritech.net
68.249.42.15	PTR	adsl-68-249-42-15.dsl.sgnwmi.ameritech.net
68.249.42.26	PTR	adsl-68-249-42-26.dsl.sgnwmi.ameritech.net
68.249.42.28	PTR	adsl-68-249-42-28.dsl.sgnwmi.ameritech.net
68.249.42.31	PTR	adsl-68-249-42-31.dsl.sgnwmi.ameritech.net
68.249.42.33	PTR	adsl-68-249-42-33.dsl.sgnwmi.ameritech.net
68.249.42.34	PTR	adsl-68-249-42-34.dsl.sgnwmi.ameritech.net
68.249.42.36	PTR	adsl-68-249-42-36.dsl.sgnwmi.ameritech.net
68.249.42.44	PTR	adsl-68-249-42-44.dsl.sgnwmi.ameritech.net
68.249.42.55	PTR	adsl-68-249-42-55.dsl.sgnwmi.ameritech.net
68.249.42.56	PTR	adsl-68-249-42-56.dsl.sgnwmi.ameritech.net
68.249.42.63	PTR	adsl-68-249-42-63.dsl.sgnwmi.ameritech.net
68.249.42.68	PTR	adsl-68-249-42-68.dsl.sgnwmi.ameritech.net
68.249.42.72	PTR	adsl-68-249-42-72.dsl.sgnwmi.ameritech.net
68.249.42.116	PTR	adsl-68-249-42-116.dsl.sgnwmi.ameritech.net
68.249.42.123	PTR	adsl-68-249-42-123.dsl.sgnwmi.ameritech.net
68.249.42.126	PTR	adsl-68-249-42-126.dsl.sgnwmi.ameritech.net
68.249.42.133	PTR	adsl-68-249-42-133.dsl.sgnwmi.ameritech.net
68.249.42.136	PTR	adsl-68-249-42-136.dsl.sgnwmi.ameritech.net
68.249.42.150	PTR	adsl-68-249-42-150.dsl.sgnwmi.ameritech.net
68.249.42.158	PTR	adsl-68-249-42-158.dsl.sgnwmi.ameritech.net
68.249.42.162	PTR	adsl-68-249-42-162.dsl.sgnwmi.ameritech.net
68.249.42.165	PTR	adsl-68-249-42-165.dsl.sgnwmi.ameritech.net
68.249.42.172	PTR	adsl-68-249-42-172.dsl.sgnwmi.ameritech.net
68.249.42.176	PTR	adsl-68-249-42-176.dsl.sgnwmi.ameritech.net
68.249.42.177	PTR	adsl-68-249-42-177.dsl.sgnwmi.ameritech.net
68.249.42.181	PTR	adsl-68-249-42-181.dsl.sgnwmi.ameritech.net
68.249.42.193	PTR	adsl-68-249-42-193.dsl.sgnwmi.ameritech.net
68.249.42.194	PTR	adsl-68-249-42-194.dsl.sgnwmi.ameritech.net
68.249.42.207	PTR	adsl-68-249-42-207.dsl.sgnwmi.ameritech.net
68.249.42.220	PTR	adsl-68-249-42-220.dsl.sgnwmi.ameritech.net
68.249.42.221	PTR	adsl-68-249-42-221.dsl.sgnwmi.ameritech.net
68.249.42.222	PTR	adsl-68-249-42-222.dsl.sgnwmi.ameritech.net
68.249.42.224	PTR	adsl-68-249-42-224.dsl.sgnwmi.ameritech.net
68.249.42.230	PTR	adsl-68-249-42-230.dsl.sgnwmi.ameritech.net
68.249.42.247	PTR	adsl-68-249-42-247.dsl.sgnwmi.ameritech.net