Robtex

Up: 66.139.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 66.139.144.0/21
Down right: 66.139.152.0/21

IP	Type	Hostname
66.139.144.144	A+PTR	adsl-66-139-144-144.dsl.okcyok.swbell.net
66.139.147.130	A	mail.mar-k.com
66.139.152.28	A	adsl-66-139-152-28.dsl.okcyok.swbell.net
66.139.152.34	PTR	adsl-66-139-152-34.dsl.okcyok.swbell.net
66.139.152.59	A	adsl-66-139-152-59.dsl.okcyok.swbell.net
66.139.152.63	A	adsl-66-139-152-63.dsl.okcyok.swbell.net
66.139.152.71	A	adsl-66-139-152-71.dsl.okcyok.swbell.net
66.139.152.77	A	adsl-66-139-152-77.dsl.okcyok.swbell.net
66.139.153.17	A	dannerburg.net
66.139.154.218	A	adsl-66-139-154-218.dsl.okcyok.swbell.net
66.139.155.97	A	adsl-66-139-155-97.dsl.okcyok.swbell.net
66.139.155.200	A	adsl-66-139-155-200.dsl.okcyok.swbell.net