Robtex

Up: 216.244.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.244.40.0/22
Down right: 216.244.44.0/22

IP	Type	Hostname
216.244.40.56	A+PTR	user-3cf8a1o.dsl.mindspring.com
216.244.40.146	A+PTR	user-3cf8a4i.dsl.mindspring.com
216.244.40.164	A	user-3cf8a54.dsl.mindspring.com
216.244.40.169	A+PTR	user-3cf8a59.dsl.mindspring.com
216.244.41.69	A	user-3cf8aa5.dsl.mindspring.com
216.244.41.80	A+PTR	user-3cf8aag.dsl.mindspring.com
216.244.41.201	A+PTR	user-3cf8ae9.dsl.mindspring.com
216.244.41.224	A+PTR	user-3cf8af0.dsl.mindspring.com
216.244.42.14	A	user-3cf8age.dsl.mindspring.com
216.244.42.16	A	user-3cf8agg.dsl.mindspring.com
216.244.42.21	A	user-3cf8agl.dsl.mindspring.com
216.244.42.25	A	user-3cf8agp.dsl.mindspring.com
216.244.42.157	A	user-3cf8akt.dsl.mindspring.com
216.244.42.200	A	user-3cf8am8.dsl.mindspring.com
216.244.42.202	A	user-3cf8ama.dsl.mindspring.com
216.244.42.208	A	user-3cf8amg.dsl.mindspring.com
216.244.43.3	A+PTR	user-3cf8ao3.dsl.mindspring.com
216.244.43.31	A	user-3cf8aov.dsl.mindspring.com
216.244.43.118	A	user-3cf8arm.dsl.mindspring.com
216.244.43.175	A	user-3cf8atf.dsl.mindspring.com
216.244.43.178	A+PTR	user-3cf8ati.dsl.mindspring.com
216.244.44.22	A	user-3cf8b0m.dsl.mindspring.com
216.244.44.118	A	user-3cf8b3m.dsl.mindspring.com
216.244.44.133	A	user-3cf8b45.dsl.mindspring.com
216.244.45.30	A	user-3cf8b8u.dsl.mindspring.com
216.244.45.101	A	user-3cf8bb5.dsl.mindspring.com
216.244.46.123	A+PTR	user-3cf8bjr.dsl.mindspring.com
216.244.46.225	A+PTR	user-3cf8bn1.dsl.mindspring.com
216.244.46.230	A	user-3cf8bn6.dsl.mindspring.com