Robtex

Up: 72.160.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 72.160.52.0/23
Down right: 72.160.54.0/23

IP	Type	Hostname
72.160.52.19	A+PTR	72-160-52-19.dyn.centurytel.net
72.160.52.97	A+PTR	72-160-52-97.dyn.centurytel.net
72.160.52.144	A+PTR	72-160-52-144.dyn.centurytel.net
72.160.52.206	A+PTR	72-160-52-206.dyn.centurytel.net
72.160.53.240	A	72-160-53-240.dyn.centurytel.net
72.160.53.248	PTR	72-160-53-248.dyn.centurytel.net
72.160.54.0	A+PTR	72-160-54-0.dyn.centurytel.net
72.160.54.13	A+PTR	72-160-54-13.dyn.centurytel.net
72.160.54.20	A+PTR	72-160-54-20.dyn.centurytel.net
72.160.54.22	A+PTR	72-160-54-22.dyn.centurytel.net
72.160.54.31	A+PTR	72-160-54-31.dyn.centurytel.net
72.160.54.32	A+PTR	72-160-54-32.dyn.centurytel.net
72.160.54.39	A+PTR	72-160-54-39.dyn.centurytel.net
72.160.54.46	A+PTR	72-160-54-46.dyn.centurytel.net
72.160.54.52	A+PTR	72-160-54-52.dyn.centurytel.net
72.160.54.59	A+PTR	72-160-54-59.dyn.centurytel.net
72.160.54.64	A+PTR	72-160-54-64.dyn.centurytel.net
72.160.54.81	A+PTR	72-160-54-81.dyn.centurytel.net
72.160.54.86	A+PTR	72-160-54-86.dyn.centurytel.net
72.160.54.97	A+PTR	72-160-54-97.dyn.centurytel.net
72.160.54.102	A+PTR	72-160-54-102.dyn.centurytel.net
72.160.54.115	A+PTR	72-160-54-115.dyn.centurytel.net
72.160.54.116	A+PTR	72-160-54-116.dyn.centurytel.net
72.160.54.121	A+PTR	72-160-54-121.dyn.centurytel.net
72.160.54.126	A+PTR	72-160-54-126.dyn.centurytel.net
72.160.54.133	A+PTR	72-160-54-133.dyn.centurytel.net
72.160.54.166	A+PTR	72-160-54-166.dyn.centurytel.net
72.160.54.170	A+PTR	72-160-54-170.dyn.centurytel.net
72.160.54.176	A+PTR	72-160-54-176.dyn.centurytel.net
72.160.54.178	A+PTR	72-160-54-178.dyn.centurytel.net
72.160.54.180	A	72-160-54-180.dyn.centurytel.net
72.160.54.204	PTR	72-160-54-204.dyn.centurytel.net
72.160.54.212	A+PTR	72-160-54-212.dyn.centurytel.net
72.160.54.231	A+PTR	72-160-54-231.dyn.centurytel.net
72.160.54.233	A+PTR	72-160-54-233.dyn.centurytel.net
72.160.54.238	A+PTR	72-160-54-238.dyn.centurytel.net
72.160.54.245	A+PTR	72-160-54-245.dyn.centurytel.net
72.160.54.252	A+PTR	72-160-54-252.dyn.centurytel.net
72.160.54.253	A+PTR	72-160-54-253.dyn.centurytel.net
72.160.55.143	PTR	72-160-55-143.dyn.centurytel.net