Robtex

Up: 208.106.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 208.106.72.0/22
Down right: 208.106.76.0/22

IP	Type	Hostname
208.106.72.0	PTR	208-106-72-0.adsl.shasta.com
208.106.73.7	A	208-106-73-7.adsl.shasta.com
208.106.73.212	A	208-106-73-212.adsl.shasta.com
208.106.74.27	A+PTR	208-106-74-27.adsl.shasta.com
208.106.74.162	A+PTR	208-106-74-162.adsl.shasta.com
208.106.76.0	PTR	208-106-76-0.adsl.dynamic.c-zone.net
208.106.76.161	PTR	208-106-76-161.dedicated.static.sonic.net