Robtex

Up: 192.164.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 192.164.64.0/20
Down right: 192.164.80.0/20
(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	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
192.164.68.16	A	192-164-68-16.adsl.highway.telekom.at
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
192.164.68.201	A	192-164-68-201.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
192.164.68.238	A	192-164-68-238.adsl.highway.telekom.at
192.164.68.249	A	192-164-68-249.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
192.164.72.4	A	vpn.oeamtc.at
192.164.72.6	A+PTR	pat.oeamtc.at
192.164.72.7	A+PTR	scm1.oeamtc.at
192.164.72.8	A	mail1.oeamtc.at
192.164.72.131	A	cfvvideo.oeamtc.at
192.164.72.169	A+PTR	webmail.oeamtc.at
192.164.72.170	A+PTR	iowa.oeamtc.at
192.164.72.179	A+PTR	vpn.oeamtc.at
192.164.72.180	A	entitlement.oeamtc.at
192.164.72.212	A+PTR	unterwegs.oeamtc.at
192.164.72.214	A	espoke.assistance-data.com
192.164.72.218	A+PTR	jira.oeamtc.at
192.164.72.230	A	mailrelay1.oeamtc.at
192.164.79.100	A	mail.oeamtc.at
192.164.80.1	A+PTR	192-164-80-1.adsl.highway.telekom.at
192.164.80.60	A+PTR	192-164-80-60.adsl.highway.telekom.at
192.164.80.200	A+PTR	192-164-80-200.adsl.highway.telekom.at
192.164.80.200	A	b4psdvuwjdttjy2h.myfritz.net
192.164.80.240	A	192-164-80-240.adsl.highway.telekom.at
192.164.83.21	A+PTR	192-164-83-21.adsl.highway.telekom.at
192.164.84.1	A+PTR	192-164-84-1.adsl.highway.telekom.at
192.164.85.1	PTR	192-164-85-1.adsl.highway.telekom.at
192.164.85.181	A+PTR	192-164-85-181.adsl.highway.telekom.at
192.164.86.10	PTR	192-164-86-10.adsl.highway.telekom.at
192.164.87.64	PTR	192-164-87-64.adsl.highway.telekom.at
192.164.87.68	A+PTR	192-164-87-68.adsl.highway.telekom.at
192.164.88.45	A+PTR	192-164-88-45.adsl.highway.telekom.at
192.164.88.135	PTR	192-164-88-135.adsl.highway.telekom.at
192.164.88.210	PTR	192-164-88-210.adsl.highway.telekom.at
192.164.91.249	PTR	192-164-91-249.adsl.highway.telekom.at
192.164.92.192	A+PTR	192-164-92-192.adsl.highway.telekom.at