Robtex

Up: 217.146.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.146.12.0/25
Down right: 217.146.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.146.12.2	A+PTR	server21401.teamviewer.com
217.146.12.3	A+PTR	server21402.teamviewer.com
217.146.12.4	A+PTR	server21403.teamviewer.com
217.146.12.5	A+PTR	server21404.teamviewer.com
217.146.12.6	A+PTR	server21405.teamviewer.com
217.146.12.18	PTR	mumbai.tigerbackbone.com
217.146.12.18	A	mum.tigervpn.com
217.146.12.26	A	mum.tigervpn.com
217.146.12.38	A	india.franchiseasia.com
217.146.12.38	A	franchiseasia.com
217.146.12.42	A+PTR	server21406.teamviewer.com
217.146.12.43	A+PTR	server21407.teamviewer.com
217.146.12.44	A+PTR	server21408.teamviewer.com
217.146.12.66	A+PTR	mumbai1up.monitis.com
217.146.12.110	A	in6-36tyt3x7.wtfast.com
217.146.12.132	A+PTR	in-mum-anx-r001.teamviewer.com
217.146.12.132	A	router4.dyntest.teamviewer-test.com
217.146.12.132	A	router4.rlb.teamviewer.com
217.146.12.133	A+PTR	in-mum-anx-r002.teamviewer.com
217.146.12.133	A	router5.dyntest.teamviewer-test.com
217.146.12.134	A+PTR	in-mum-anx-r003.teamviewer.com
217.146.12.134	A	router6.dyntest.teamviewer-test.com
217.146.12.134	A	router6.rlb.teamviewer.com
217.146.12.135	A+PTR	in-mum-anx-r004.teamviewer.com
217.146.12.135	A	router7.rlb.teamviewer.com
217.146.12.136	A+PTR	in-mum-anx-r005.teamviewer.com
217.146.12.137	A+PTR	in-mum-anx-r006.teamviewer.com
217.146.12.137	A	router9.dyntest.teamviewer-test.com
217.146.12.138	A+PTR	in-mum-anx-r007.teamviewer.com
217.146.12.138	A	router10.dyntest.teamviewer-test.com
217.146.12.139	A	in-mum-anx-r008.teamviewer.com
217.146.12.139	A	router11.dyntest.teamviewer-test.com
217.146.12.139	A	router11.rlb.teamviewer.com
217.146.12.140	A+PTR	in-mum-anx-r009.teamviewer.com
217.146.12.140	A	router12.rlb.teamviewer.com
217.146.12.140	A	router12.dyntest.teamviewer-test.com
217.146.12.141	A+PTR	in-mum-anx-r010.teamviewer.com
217.146.12.141	A	router13.dyntest.teamviewer-test.com