Robtex

Up: 212.243.120.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.243.121.0/25
Down right: 212.243.121.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.243.121.20	A+PTR	ns2.netgrouper.ch
212.243.121.23	A+PTR	nstemp.netgrouper.ch
212.243.121.28	A	smtp05.netgrouper.ch
212.243.121.33	A+PTR	cws03.netgrouper.ch
212.243.121.33	A	cws01.netgrouper.ch
212.243.121.35	A+PTR	mta02.netgrouper.ch
212.243.121.40	A	webmail.4plcs.com
212.243.121.40	A	mail.4plcentralstation.com
212.243.121.52	A+PTR	mail.swisslex.ch
212.243.121.52	A	mail01.swisslex.ch
212.243.121.53	A	ftp.swisslex.ch
212.243.121.53	A	upload.swisslex.ch
212.243.121.54	A	arv-online.ch
212.243.121.54	A	or2020.ch
212.243.121.54	A	jurnews.ch
212.243.121.55	A	print1.swisslex.ch
212.243.121.55	A	css-prod-web.swisslex.ch
212.243.121.55	A	sorry.swisslex.ch
212.243.121.68	A	mail.medphone.ch
212.243.121.151	A	in-lab.ch
212.243.121.152	A+PTR	pgm-vpn.netgrouper.ch
212.243.121.152	A	netgrouper.ch
212.243.121.157	PTR	bankjobs.ch
212.243.121.157	PTR	nurissa.netgrouper.ch
212.243.121.157	A	chemie-stellen.ch
212.243.121.159	A	www.stellen-anzeiger.ch
212.243.121.159	A	stellen-anzeiger.ch
212.243.121.162	A	edv-jobs.ch
212.243.121.167	A	stellenvermittler.ch
212.243.121.168	A	suissejobs.ch
212.243.121.172	A	itjuniors.ch
212.243.121.173	A	medicjobs.ch
212.243.121.180	A	kontextplan.ch
212.243.121.192	A	mail.careerplus.ch
212.243.121.197	A	sclerose-en-plaques.ch
212.243.121.197	A	www.ms-kids.ch
212.243.121.197	A	sclerosi-multipla.ch