Robtex

Up: 72.161.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.161.80.0/23
Down right: 72.161.82.0/23

IP	Type	Hostname
72.161.80.1	A+PTR	72-161-80-1.dyn.centurytel.net
72.161.80.23	A+PTR	72-161-80-23.dyn.centurytel.net
72.161.80.186	A+PTR	72-161-80-186.dyn.centurytel.net
72.161.81.2	A+PTR	72-161-81-2.dyn.centurytel.net
72.161.81.4	A+PTR	72-161-81-4.dyn.centurytel.net
72.161.81.8	A+PTR	72-161-81-8.dyn.centurytel.net
72.161.81.17	A+PTR	72-161-81-17.dyn.centurytel.net
72.161.81.20	A+PTR	72-161-81-20.dyn.centurytel.net
72.161.81.21	A+PTR	72-161-81-21.dyn.centurytel.net
72.161.81.24	A+PTR	72-161-81-24.dyn.centurytel.net
72.161.81.25	A+PTR	72-161-81-25.dyn.centurytel.net
72.161.81.30	A+PTR	72-161-81-30.dyn.centurytel.net
72.161.81.33	A+PTR	72-161-81-33.dyn.centurytel.net
72.161.81.34	A+PTR	72-161-81-34.dyn.centurytel.net
72.161.81.36	A+PTR	72-161-81-36.dyn.centurytel.net
72.161.81.46	A+PTR	72-161-81-46.dyn.centurytel.net
72.161.81.49	A+PTR	72-161-81-49.dyn.centurytel.net
72.161.81.50	A+PTR	72-161-81-50.dyn.centurytel.net
72.161.81.52	A+PTR	72-161-81-52.dyn.centurytel.net
72.161.81.53	A+PTR	72-161-81-53.dyn.centurytel.net
72.161.81.54	A+PTR	72-161-81-54.dyn.centurytel.net
72.161.81.55	A+PTR	72-161-81-55.dyn.centurytel.net
72.161.81.69	A+PTR	72-161-81-69.dyn.centurytel.net
72.161.81.70	A+PTR	72-161-81-70.dyn.centurytel.net
72.161.81.72	A+PTR	72-161-81-72.dyn.centurytel.net
72.161.81.76	A+PTR	72-161-81-76.dyn.centurytel.net
72.161.81.78	A+PTR	72-161-81-78.dyn.centurytel.net
72.161.81.81	A+PTR	72-161-81-81.dyn.centurytel.net
72.161.81.84	A+PTR	72-161-81-84.dyn.centurytel.net
72.161.81.93	A+PTR	72-161-81-93.dyn.centurytel.net
72.161.81.97	A+PTR	72-161-81-97.dyn.centurytel.net
72.161.81.101	A+PTR	72-161-81-101.dyn.centurytel.net
72.161.81.104	A+PTR	72-161-81-104.dyn.centurytel.net
72.161.81.106	A+PTR	72-161-81-106.dyn.centurytel.net
72.161.81.119	A+PTR	72-161-81-119.dyn.centurytel.net
72.161.81.122	A+PTR	72-161-81-122.dyn.centurytel.net
72.161.81.124	A+PTR	72-161-81-124.dyn.centurytel.net
72.161.81.125	A+PTR	72-161-81-125.dyn.centurytel.net
72.161.81.127	A+PTR	72-161-81-127.dyn.centurytel.net
72.161.81.131	A+PTR	72-161-81-131.dyn.centurytel.net
72.161.81.132	A+PTR	72-161-81-132.dyn.centurytel.net
72.161.81.135	A+PTR	72-161-81-135.dyn.centurytel.net
72.161.81.136	A+PTR	72-161-81-136.dyn.centurytel.net
72.161.81.140	A+PTR	72-161-81-140.dyn.centurytel.net
72.161.81.143	A+PTR	72-161-81-143.dyn.centurytel.net
72.161.81.147	A+PTR	72-161-81-147.dyn.centurytel.net
72.161.81.156	A+PTR	72-161-81-156.dyn.centurytel.net
72.161.81.157	A+PTR	72-161-81-157.dyn.centurytel.net
72.161.81.159	A+PTR	72-161-81-159.dyn.centurytel.net
72.161.81.165	A+PTR	72-161-81-165.dyn.centurytel.net
72.161.81.174	A+PTR	72-161-81-174.dyn.centurytel.net
72.161.81.183	A+PTR	72-161-81-183.dyn.centurytel.net
72.161.81.187	A+PTR	72-161-81-187.dyn.centurytel.net
72.161.81.194	A+PTR	72-161-81-194.dyn.centurytel.net
72.161.81.200	A+PTR	72-161-81-200.dyn.centurytel.net
72.161.81.203	A+PTR	72-161-81-203.dyn.centurytel.net
72.161.81.206	A+PTR	72-161-81-206.dyn.centurytel.net
72.161.81.212	A+PTR	72-161-81-212.dyn.centurytel.net
72.161.81.214	A+PTR	72-161-81-214.dyn.centurytel.net
72.161.81.232	A+PTR	72-161-81-232.dyn.centurytel.net
72.161.81.247	A+PTR	72-161-81-247.dyn.centurytel.net
72.161.81.248	A+PTR	72-161-81-248.dyn.centurytel.net
72.161.81.251	A+PTR	72-161-81-251.dyn.centurytel.net
72.161.83.17	A+PTR	72-161-83-17.dyn.centurytel.net
72.161.83.168	A+PTR	72-161-83-168.dyn.centurytel.net