Robtex

Up: 185.50.184.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 185.50.188.0/23
Down right: 185.50.190.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
185.50.189.7	PTR	exchange1.ad.edsi-tech.com
185.50.189.7	A	exchange.edsi-tech.com
185.50.189.17	A+PTR	mx1.edsi-tech.com
185.50.189.18	A+PTR	mx3.edsi-tech.com
185.50.189.18	A	backup-mx.edsi-tech.com
185.50.189.22	A	lake-geneva-region.info
185.50.189.22	A	lake-geneva-region.com
185.50.189.22	A	proxy1.mycity.travel
185.50.189.25	PTR	mail.edsi-tech.com
185.50.189.25	A	mail.zivana.ch
185.50.189.25	A	mail.sequoiapartners.ch
185.50.189.30	PTR	web-lb.edsi-tech.com
185.50.189.30	A	apexsa.ch
185.50.189.30	A	edsi-tech.be
185.50.189.57	A+PTR	mx1-qls1.edsi-tech.com
185.50.189.57	A	mailfilter1.edsi-tech.com
185.50.189.99	PTR	dns1.edsi-tech.com
185.50.189.117	A+PTR	mx2.edsi-tech.com
185.50.190.57	A+PTR	mx1-qls2.edsi-tech.com
185.50.190.57	A	mailfilter2.edsi-tech.com
185.50.190.59	A	galphanet.com
185.50.190.59	A	stldesign.ch
185.50.190.88	A	tiendaslyf.com
185.50.190.190	PTR	dns1-qls2.edsi-tech.com
185.50.190.190	A	dns-test.edsi-tech.info
185.50.190.250	PTR	dns2.edsi-tech.com
185.50.191.6	PTR	web-lb.mycity.travel
185.50.191.6	A	tourdulac.ch
185.50.191.6	A	protourisme.ch
185.50.191.10	A+PTR	dns1.edsi-tech.com
185.50.191.12	A	ex01.2fk.ch
185.50.191.53	PTR	as204136-gw.edsi-tech.com
185.50.191.68	A+PTR	btc-ct-105.edsi-tech.com
185.50.191.72	A	lab5.houriet.com
185.50.191.72	A	houriet.com
185.50.191.132	A+PTR	quranforsoul.org
185.50.191.244	A	alliance-tt.edsi-tech.info
185.50.191.246	PTR	www.otv24.ch
185.50.191.246	A	otv24.ch
185.50.191.250	PTR	tor-exit-node.example.com
185.50.191.252	PTR	media.epfl.ch
185.50.191.252	A	media.edsi-tech.info
185.50.191.253	A	dodis.ch