Robtex

Up: 216.78.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.78.80.0/23
Down right: 216.78.82.0/23

IP	Type	Hostname
216.78.80.9	A+PTR	host-216-78-80-9.bgk.bellsouth.net
216.78.80.38	A+PTR	host-216-78-80-38.bgk.bellsouth.net
216.78.80.54	A+PTR	host-216-78-80-54.bgk.bellsouth.net
216.78.80.67	A+PTR	host-216-78-80-67.bgk.bellsouth.net
216.78.80.73	A+PTR	host-216-78-80-73.bgk.bellsouth.net
216.78.80.120	A+PTR	host-216-78-80-120.bgk.bellsouth.net
216.78.80.134	A+PTR	host-216-78-80-134.bgk.bellsouth.net
216.78.80.169	A+PTR	host-216-78-80-169.bgk.bellsouth.net
216.78.80.210	A+PTR	host-216-78-80-210.bgk.bellsouth.net
216.78.81.26	A+PTR	host-216-78-81-26.bgk.bellsouth.net
216.78.81.39	A+PTR	host-216-78-81-39.bgk.bellsouth.net
216.78.81.48	A+PTR	host-216-78-81-48.bgk.bellsouth.net
216.78.81.74	A+PTR	host-216-78-81-74.bgk.bellsouth.net
216.78.81.83	A+PTR	host-216-78-81-83.bgk.bellsouth.net
216.78.81.85	A+PTR	host-216-78-81-85.bgk.bellsouth.net
216.78.81.88	A+PTR	host-216-78-81-88.bgk.bellsouth.net
216.78.81.92	A+PTR	host-216-78-81-92.bgk.bellsouth.net
216.78.81.99	A+PTR	host-216-78-81-99.bgk.bellsouth.net
216.78.81.106	A+PTR	host-216-78-81-106.bgk.bellsouth.net
216.78.81.138	A+PTR	host-216-78-81-138.bgk.bellsouth.net
216.78.81.161	A+PTR	host-216-78-81-161.bgk.bellsouth.net
216.78.81.211	A+PTR	host-216-78-81-211.bgk.bellsouth.net
216.78.81.218	A+PTR	host-216-78-81-218.bgk.bellsouth.net
216.78.81.228	A+PTR	host-216-78-81-228.bgk.bellsouth.net
216.78.83.79	A+PTR	host-216-78-83-79.bgk.bellsouth.net
216.78.83.83	A+PTR	host-216-78-83-83.bgk.bellsouth.net
216.78.83.106	A+PTR	host-216-78-83-106.bgk.bellsouth.net
216.78.83.231	A+PTR	host-216-78-83-231.bgk.bellsouth.net
216.78.83.246	A+PTR	host-216-78-83-246.bgk.bellsouth.net
216.78.83.251	A+PTR	host-216-78-83-251.bgk.bellsouth.net