Robtex

Up: 208.163.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 208.163.128.0/20
Down right: 208.163.144.0/20

IP	Type	Hostname
208.163.128.0	PTR	nc-208-163-128-0.dyn.centurytel.net
208.163.129.76	PTR	fl-208-163-129-76.dhcp.embarqhsd.net
208.163.130.0	PTR	nc-208-163-130-0.dyn.centurytel.net
208.163.133.66	PTR	fl-208-163-133-66.dhcp.embarqhsd.net
208.163.136.37	PTR	nc-208-163-136-37.dyn.centurytel.net
208.163.138.194	A	rickyfriend.com
208.163.138.194	A	rick-friend.com
208.163.144.130	PTR	nc-208-163-144-130.dyn.centurytel.net
208.163.144.172	A	fl-208-163-144-172.dhcp.embarqhsd.net
208.163.145.208	PTR	nc-208-163-145-208.dyn.centurytel.net
208.163.147.138	PTR	nc-208-163-147-138.dyn.centurytel.net