Robtex

Up: 71.80.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 71.80.36.0/23
Down right: 71.80.38.0/23

IP	Type	Hostname
71.80.36.50	A	mail.tennesseenational.com
71.80.36.62	A+PTR	71-80-36-62.static.kgpt.tn.charter.com
71.80.36.98	A	nh3072.dyndns.org
71.80.37.6	A+PTR	71-80-37-6.static.kgpt.tn.charter.com
71.80.37.17	A+PTR	71-80-37-17.static.kgpt.tn.charter.com
71.80.37.27	A+PTR	71-80-37-27.static.kgpt.tn.charter.com
71.80.37.53	A	smtp.cupahr.org
71.80.39.59	PTR	71-80-39-59.static.kgpt.tn.charter.com
71.80.39.108	A	71-80-39-108.dhcp.kgpt.tn.charter.com
71.80.39.173	A+PTR	71-80-39-173.static.kgpt.tn.charter.com
71.80.39.255	A+PTR	71-80-39-255.static.kgpt.tn.charter.com