Robtex

Up: 192.164.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 192.164.64.0/22
Down right: 192.164.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.164.64.0	A+PTR	192-164-64-0.adsl.highway.telekom.at
192.164.64.1	A+PTR	192-164-64-1.adsl.highway.telekom.at
192.164.64.99	A	heykey.net
192.164.65.51	A	ess.co.at
192.164.65.112	A+PTR	192-164-65-112.adsl.highway.telekom.at
192.164.66.97	A+PTR	192-164-66-97.adsl.highway.telekom.at
192.164.66.250	A	thoma.co.at
192.164.67.27	A+PTR	192-164-67-27.adsl.highway.telekom.at
192.164.67.27	A	weasl-it.com
192.164.67.230	PTR	192-164-67-230.adsl.highway.telekom.at
192.164.67.230	A	autohaus-reisner.at
192.164.67.230	A	pia-deutschland.de
192.164.67.255	A+PTR	192-164-67-255.adsl.highway.telekom.at
192.164.68.0	PTR	192-164-68-0.adsl.highway.telekom.at
192.164.68.1	A+PTR	192-164-68-1.adsl.highway.telekom.at
192.164.68.3	A+PTR	192-164-68-3.adsl.highway.telekom.at
192.164.68.12	PTR	d012.akg-acoustics.com
192.164.68.16	A+PTR	192-164-68-16.adsl.highway.telekom.at
192.164.68.17	PTR	d017.akg-acoustics.com
192.164.68.19	PTR	d019.akg-acoustics.com
192.164.68.192	PTR	d192.akg-acoustics.com
192.164.68.193	A+PTR	192-164-68-193.adsl.highway.telekom.at
192.164.68.194	A+PTR	192-164-68-194.adsl.highway.telekom.at
192.164.68.195	A+PTR	192-164-68-195.adsl.highway.telekom.at
192.164.68.200	PTR	d200.akg-acoustics.com
192.164.68.201	A+PTR	192-164-68-201.adsl.highway.telekom.at
192.164.68.202	PTR	d202.akg-acoustics.com
192.164.68.203	A+PTR	192-164-68-203.adsl.highway.telekom.at
192.164.68.204	A	192-164-68-204.adsl.highway.telekom.at
192.164.68.210	PTR	d210.akg-acoustics.com
192.164.68.211	PTR	d211.akg-acoustics.com
192.164.68.213	A	192-164-68-213.adsl.highway.telekom.at
192.164.68.215	A	192-164-68-215.adsl.highway.telekom.at
192.164.68.216	PTR	d216.akg-acoustics.com
192.164.68.217	PTR	d217.akg-acoustics.com
192.164.68.219	PTR	d219.akg-acoustics.com
192.164.68.220	A	192-164-68-220.adsl.highway.telekom.at
192.164.68.221	A	192-164-68-221.adsl.highway.telekom.at
192.164.68.222	A	192-164-68-222.adsl.highway.telekom.at
192.164.68.226	A+PTR	192-164-68-226.adsl.highway.telekom.at
192.164.68.227	A+PTR	192-164-68-227.adsl.highway.telekom.at
192.164.68.232	PTR	d232.akg-acoustics.com
192.164.68.238	A	192-164-68-238.adsl.highway.telekom.at
192.164.68.249	A+PTR	192-164-68-249.adsl.highway.telekom.at
192.164.68.251	A+PTR	192-164-68-251.adsl.highway.telekom.at
192.164.68.254	A	192-164-68-254.adsl.highway.telekom.at
192.164.69.218	PTR	192-164-69-218.adsl.highway.telekom.at
192.164.70.28	A+PTR	192-164-70-28.adsl.highway.telekom.at
192.164.71.255	PTR	192-164-71-255.adsl.highway.telekom.at