Robtex

Up: 209.71.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 209.71.88.0/22
Down right: 209.71.92.0/22

IP	Type	Hostname
209.71.88.41	PTR	dialpool0941-pri.dialpool09.voicenet.com
209.71.88.233	PTR	dialpool1238-pri.dialpool12.voicenet.com
209.71.89.4	PTR	dialpool1304-pri.dialpool13.voicenet.com
209.71.89.65	PTR	dialpool1400-pri.dialpool14.voicenet.com
209.71.89.208	PTR	dialpool1615-pri.dialpool16.voicenet.com
209.71.89.226	PTR	dialpool1631-pri.dialpool16.voicenet.com
209.71.90.132	PTR	gaypa.org
209.71.90.154	PTR	www.keepstill.com
209.71.95.52	PTR	banshee.ancients.net
209.71.95.57	PTR	neuron.maxrisc.net