Robtex

Up: 64.41.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.41.16.0/22
Down right: 64.41.20.0/22

IP	Type	Hostname
64.41.16.13	A	user-102i40d.dsl.mindspring.com
64.41.16.67	A+PTR	user-102i423.dsl.mindspring.com
64.41.16.77	A	user-102i42d.dsl.mindspring.com
64.41.16.159	A	user-102i44v.dsl.mindspring.com
64.41.16.188	A	user-102i45s.dsl.mindspring.com
64.41.16.231	A	user-102i477.dsl.mindspring.com
64.41.16.254	A	user-102i47u.dsl.mindspring.com
64.41.17.29	A	user-102i48t.dsl.mindspring.com
64.41.17.248	A	user-102i4fo.dsl.mindspring.com
64.41.18.66	A	user-102i4i2.dsl.mindspring.com
64.41.18.74	A+PTR	user-102i4ia.dsl.mindspring.com
64.41.18.108	A	user-102i4jc.dsl.mindspring.com
64.41.18.185	A	user-102i4lp.dsl.mindspring.com
64.41.19.13	A	user-102i4od.dsl.mindspring.com
64.41.19.91	A+PTR	user-102i4qr.dsl.mindspring.com
64.41.19.146	A	user-102i4si.dsl.mindspring.com
64.41.19.167	A	user-102i4t7.dsl.mindspring.com
64.41.19.222	A	user-102i4uu.dsl.mindspring.com
64.41.20.68	A	user-102i524.dsl.mindspring.com
64.41.20.113	A+PTR	user-102i53h.dsl.mindspring.com
64.41.20.163	A+PTR	user-102i553.dsl.mindspring.com
64.41.20.179	A	user-102i55j.dsl.mindspring.com
64.41.20.184	A	user-102i55o.dsl.mindspring.com
64.41.20.199	A	user-102i567.dsl.mindspring.com
64.41.20.219	A+PTR	user-102i56r.dsl.mindspring.com
64.41.20.253	A	user-102i57t.dsl.mindspring.com
64.41.21.14	A	user-102i58e.dsl.mindspring.com
64.41.21.54	A	user-102i59m.dsl.mindspring.com
64.41.21.64	A	user-102i5a0.dsl.mindspring.com
64.41.21.84	A	user-102i5ak.dsl.mindspring.com
64.41.21.85	A	user-102i5al.dsl.mindspring.com
64.41.21.103	A	user-102i5b7.dsl.mindspring.com
64.41.21.125	A	user-102i5bt.dsl.mindspring.com
64.41.21.139	A+PTR	user-102i5cb.dsl.mindspring.com
64.41.22.143	A	user-102i5kf.dsl.mindspring.com
64.41.22.224	A	user-102i5n0.dsl.mindspring.com
64.41.23.3	PTR	user-102i5o3.dsl.mindspring.com
64.41.23.216	A+PTR	user-102i5uo.dsl.mindspring.com
64.41.23.225	A+PTR	user-102i5v1.dsl.mindspring.com