Robtex

Up: 64.17.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.17.68.0/23
Down right: 64.17.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.17.68.14	A+PTR	host-64-17-68-14.beyondbb.com
64.17.68.24	A+PTR	host-64-17-68-24.beyondbb.com
64.17.68.26	PTR	h64-17-68-26.crlbnm.broadband.dynamic.tds.net
64.17.68.26	A	host-64-17-68-26.beyondbb.com
64.17.68.112	A+PTR	host-64-17-68-112.beyondbb.com
64.17.68.119	PTR	host-64-17-68-119.beyondbb.com
64.17.68.210	A	host-64-17-68-210.beyondbb.com
64.17.69.20	A+PTR	h64-17-69-20.cbcvnm.broadband.dynamic.tds.net
64.17.69.20	A	host-64-17-69-20.beyondbb.com
64.17.69.20	A	h64-17-69-20.crlbnm.broadband.dynamic.tds.net
64.17.69.46	A	host-64-17-69-46.beyondbb.com
64.17.69.49	A	host-64-17-69-49.beyondbb.com
64.17.69.125	A+PTR	h64-17-69-125.crlbnm.broadband.dynamic.tds.net
64.17.69.125	A	host-64-17-69-125.beyondbb.com
64.17.69.125	A	h64-17-69-125.cbcvnm.broadband.dynamic.tds.net
64.17.69.168	A+PTR	h64-17-69-168.cbcvnm.broadband.dynamic.tds.net
64.17.69.168	A	h64-17-69-168.crlbnm.broadband.dynamic.tds.net
64.17.69.168	A	host-64-17-69-168.beyondbb.com
64.17.69.175	A	host-64-17-69-175.beyondbb.com
64.17.69.178	A+PTR	h64-17-69-178.cbcvnm.broadband.dynamic.tds.net
64.17.69.178	A	host-64-17-69-178.beyondbb.com
64.17.69.178	A	h64-17-69-178.crlbnm.broadband.dynamic.tds.net
64.17.69.181	A+PTR	h64-17-69-181.crlbnm.broadband.dynamic.tds.net
64.17.69.189	A+PTR	host-64-17-69-189.beyondbb.com
64.17.69.232	PTR	host-64-17-69-232.beyondbb.com
64.17.69.235	A+PTR	h64-17-69-235.crlbnm.broadband.dynamic.tds.net
64.17.69.235	A	h64-17-69-235.cbcvnm.broadband.dynamic.tds.net
64.17.69.235	A	host-64-17-69-235.beyondbb.com
64.17.70.57	A	host-64-17-70-57.beyondbb.com
64.17.70.84	A	host-64-17-70-84.beyondbb.com
64.17.70.112	A	mail.cnelsonnc.com
64.17.70.124	A	host-64-17-70-124.beyondbb.com
64.17.70.135	A	tschuetz.com
64.17.70.161	A	host-64-17-70-161.beyondbb.com
64.17.70.186	PTR	h64-17-70-186.ftcmco.broadband.dynamic.tds.net
64.17.70.186	A	h64-17-70-186.ftclco.broadband.dynamic.tds.net
64.17.70.186	A	host-64-17-70-186.beyondbb.com
64.17.71.2	PTR	host-64-17-71-2.beyondbb.com
64.17.71.2	A	64-17-71-2.mo.warpdriveonline.com
64.17.71.5	A	will.garthmansion.com
64.17.71.11	A	host-64-17-71-11.beyondbb.com
64.17.71.29	PTR	h64-17-71-29.crlbnm.broadband.dynamic.tds.net
64.17.71.29	A	host-64-17-71-29.beyondbb.com
64.17.71.64	PTR	h64-17-71-64.crlbnm.broadband.dynamic.tds.net
64.17.71.64	A	host-64-17-71-64.beyondbb.com
64.17.71.64	A	64-17-71-64.mo.warpdriveonline.com
64.17.71.66	PTR	h64-17-71-66.cbcvnm.broadband.dynamic.tds.net
64.17.71.66	A	h64-17-71-66.crlbnm.broadband.dynamic.tds.net
64.17.71.98	A+PTR	host-64-17-71-98.beyondbb.com
64.17.71.129	A+PTR	h64-17-71-129.cbcvnm.broadband.dynamic.tds.net
64.17.71.129	A	host-64-17-71-129.beyondbb.com
64.17.71.129	A	h64-17-71-129.crlbnm.broadband.dynamic.tds.net
64.17.71.148	A	64-17-71-148.mo.warpdriveonline.com
64.17.71.150	A+PTR	host-64-17-71-150.beyondbb.com
64.17.71.150	A	64-17-71-150.mo.warpdriveonline.com
64.17.71.191	PTR	host-64-17-71-191.beyondbb.com
64.17.71.210	A+PTR	h64-17-71-210.cbcvnm.broadband.dynamic.tds.net
64.17.71.210	A	host-64-17-71-210.beyondbb.com
64.17.71.210	A	h64-17-71-210.crlbnm.broadband.dynamic.tds.net
64.17.71.229	A	host-64-17-71-229.beyondbb.com