Robtex

Up: 188.172.252.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 188.172.252.0/24
Down right: 188.172.253.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.172.252.4	A	server26703.teamviewer.com
188.172.252.5	A	server26704.teamviewer.com
188.172.252.6	PTR	indexsq188172252.ctelnetco.com
188.172.252.6	A	server26705.teamviewer.com
188.172.252.9	PTR	cr-01.0v-00-05.anx16.lim.pe.anexia-it.com
188.172.252.18	A	live-lim.twitch.tv
188.172.252.26	PTR	indexxl188172252.ctelnetco.com
188.172.252.26	A	server26706.teamviewer.com
188.172.252.27	PTR	indexcuvbm188172252.ctelnetco.com
188.172.252.27	A	server26707.teamviewer.com
188.172.252.28	PTR	indexrvj188172252.ctelnetco.com
188.172.252.28	A	server26708.teamviewer.com
188.172.252.29	A	server26709.teamviewer.com
188.172.252.30	A	server26710.teamviewer.com
188.172.252.34	A+PTR	s4026.pingdom.com
188.172.252.50	A+PTR	lim.uptrends.net
188.172.252.58	A	api.lim.gfpnet.com
188.172.252.68	A+PTR	pe-lim-anx-r001.teamviewer.com
188.172.252.68	A	router14.dyntest.teamviewer-test.com
188.172.252.69	A+PTR	pe-lim-anx-r002.teamviewer.com
188.172.252.69	A	router15.rlb.teamviewer.com
188.172.252.70	PTR	indexjmao188172252.ctelnetco.com
188.172.252.70	A	pe-lim-anx-r003.teamviewer.com
188.172.252.70	A	router16.dyntest.teamviewer-test.com
188.172.252.71	A+PTR	pe-lim-anx-r004.teamviewer.com
188.172.252.72	PTR	indexmnubj188172252.ctelnetco.com
188.172.252.72	A	router2.dyntest.teamviewer-test.com
188.172.252.72	A	router2.rlb.teamviewer.com
188.172.252.94	A+PTR	pe-lim-anx-p001.teamviewer.com
188.172.252.94	A	ping3.teamviewer.com
188.172.252.134	A	lima.remotepc.com