Robtex

Up: 72.160.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.160.204.0/23
Down right: 72.160.206.0/23

IP	Type	Hostname
72.160.206.19	A+PTR	72-160-206-19.dyn.centurytel.net
72.160.206.29	A+PTR	72-160-206-29.dyn.centurytel.net
72.160.206.61	A+PTR	72-160-206-61.dyn.centurytel.net
72.160.206.66	A+PTR	72-160-206-66.dyn.centurytel.net
72.160.206.68	A+PTR	72-160-206-68.dyn.centurytel.net
72.160.206.73	A+PTR	72-160-206-73.dyn.centurytel.net
72.160.206.82	A+PTR	72-160-206-82.dyn.centurytel.net
72.160.206.92	A+PTR	72-160-206-92.dyn.centurytel.net
72.160.206.98	A+PTR	72-160-206-98.dyn.centurytel.net
72.160.206.100	A+PTR	72-160-206-100.dyn.centurytel.net
72.160.206.119	A+PTR	72-160-206-119.dyn.centurytel.net
72.160.206.126	A+PTR	72-160-206-126.dyn.centurytel.net
72.160.206.138	A+PTR	72-160-206-138.dyn.centurytel.net
72.160.206.140	A+PTR	72-160-206-140.dyn.centurytel.net
72.160.206.157	A+PTR	72-160-206-157.dyn.centurytel.net
72.160.206.159	A+PTR	72-160-206-159.dyn.centurytel.net
72.160.206.172	A+PTR	72-160-206-172.dyn.centurytel.net
72.160.206.179	A+PTR	72-160-206-179.dyn.centurytel.net
72.160.206.200	A+PTR	72-160-206-200.dyn.centurytel.net
72.160.206.201	A+PTR	72-160-206-201.dyn.centurytel.net
72.160.206.206	A+PTR	72-160-206-206.dyn.centurytel.net
72.160.206.208	A+PTR	72-160-206-208.dyn.centurytel.net
72.160.206.211	A+PTR	72-160-206-211.dyn.centurytel.net
72.160.206.212	A+PTR	72-160-206-212.dyn.centurytel.net
72.160.206.221	A+PTR	72-160-206-221.dyn.centurytel.net
72.160.206.223	A+PTR	72-160-206-223.dyn.centurytel.net
72.160.206.229	A+PTR	72-160-206-229.dyn.centurytel.net
72.160.206.231	A+PTR	72-160-206-231.dyn.centurytel.net
72.160.206.241	A+PTR	72-160-206-241.dyn.centurytel.net
72.160.206.247	A+PTR	72-160-206-247.dyn.centurytel.net