Robtex

Up: 64.108.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.108.40.0/23
Down right: 64.108.42.0/23

IP	Type	Hostname
64.108.41.79	A	adsl-64-108-41-79.dsl.rcfril.ameritech.net
64.108.41.108	A+PTR	adsl-64-108-41-108.dsl.rcfril.ameritech.net
64.108.42.42	A+PTR	adsl-64-108-42-42.dsl.rcfril.ameritech.net
64.108.42.64	A+PTR	adsl-64-108-42-64.dsl.rcfril.ameritech.net
64.108.42.163	A+PTR	adsl-64-108-42-163.dsl.rcfril.ameritech.net
64.108.42.218	A+PTR	adsl-64-108-42-218.dsl.rcfril.ameritech.net
64.108.43.114	A+PTR	adsl-64-108-43-114.dsl.rcfril.ameritech.net
64.108.43.193	A+PTR	adsl-64-108-43-193.dsl.rcfril.ameritech.net
64.108.43.253	A+PTR	adsl-64-108-43-253.dsl.rcfril.ameritech.net