Robtex

Up: 71.31.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 71.31.72.0/23
Down right: 71.31.74.0/23

IP	Type	Hostname
71.31.72.46	A	h46.72.31.71.dynamic.ip.windstream.net
71.31.72.188	A+PTR	h188.72.31.71.dynamic.ip.windstream.net
71.31.72.255	A+PTR	h255.72.31.71.dynamic.ip.windstream.net
71.31.73.213	PTR	h213.73.31.71.dynamic.ip.windstream.net
71.31.73.222	A+PTR	h222.73.31.71.dynamic.ip.windstream.net
71.31.73.246	A+PTR	h246.73.31.71.dynamic.ip.windstream.net
71.31.74.41	A+PTR	h41.74.31.71.dynamic.ip.windstream.net
71.31.74.80	PTR	h80.74.31.71.dynamic.ip.windstream.net
71.31.74.140	A+PTR	h140.74.31.71.dynamic.ip.windstream.net
71.31.75.26	A+PTR	h26.75.31.71.dynamic.ip.windstream.net