Robtex

Up: 188.172.234.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 188.172.235.0/25
Down right: 188.172.235.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.172.235.132	A+PTR	ch-zrh-anx-r001.teamviewer.com
188.172.235.133	A+PTR	ch-zrh-anx-r002.teamviewer.com
188.172.235.133	A	routerpool2.rlb.teamviewer.com
188.172.235.134	A+PTR	ch-zrh-anx-r003.teamviewer.com
188.172.235.135	A+PTR	ch-zrh-anx-r004.teamviewer.com
188.172.235.136	A+PTR	ch-zrh-anx-r005.teamviewer.com
188.172.235.137	PTR	188-172-235-137.ctelnetco.com
188.172.235.137	A	ch-zrh-anx-r006.teamviewer.com
188.172.235.138	A+PTR	ch-zrh-anx-r007.teamviewer.com
188.172.235.139	A+PTR	ch-zrh-anx-r008.teamviewer.com
188.172.235.140	A+PTR	ch-zrh-anx-r009.teamviewer.com
188.172.235.141	A+PTR	ch-zrh-anx-r010.teamviewer.com
188.172.235.142	A+PTR	ch-zrh-anx-r011.teamviewer.com
188.172.235.143	PTR	188-172-235-143.ctelnetco.com
188.172.235.143	A	routerpool3.rlb.teamviewer.com
188.172.235.143	A	routerpool4.rlb.teamviewer.com
188.172.235.144	PTR	188-172-235-144.ctelnetco.com
188.172.235.144	A	ch-zrh-anx-r013.teamviewer.com
188.172.235.145	A+PTR	ch-zrh-anx-r014.teamviewer.com
188.172.235.145	A	routerpool9.rlb.teamviewer.com
188.172.235.146	A+PTR	ch-zrh-anx-r015.teamviewer.com
188.172.235.146	A	routerpool8.rlb.teamviewer.com
188.172.235.147	A+PTR	ch-zrh-anx-r016.teamviewer.com
188.172.235.148	A	ch-zrh-anx-r017.teamviewer.com
188.172.235.149	PTR	188-172-235-149.ctelnetco.com
188.172.235.149	A	ch-zrh-anx-r018.teamviewer.com
188.172.235.150	A	ch-zrh-anx-r019.teamviewer.com
188.172.235.151	PTR	188-172-235-151.ctelnetco.com
188.172.235.151	A	ch-zrh-anx-r020.teamviewer.com
188.172.235.152	A	ch-zrh-anx-r021.teamviewer.com
188.172.235.155	A	ch-zrh-anx-r024.teamviewer.com
188.172.235.156	PTR	188-172-235-156.ctelnetco.com
188.172.235.197	PTR	ch-zrh-anx-002.wm.teamviewer-rm.com