Robtex

Up: 87.237.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 87.237.172.0/23
Down right: 87.237.174.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.237.172.9	A+PTR	mail.skos.ch
87.237.172.9	A	mail.cosas.ch
87.237.172.9	A	mail.csias.ch
87.237.172.12	PTR	host-87-237-172-12.dsl-schweiz.ch
87.237.172.12	A	mail1.adx.ch
87.237.172.17	A	home.aironaut.ch
87.237.172.20	PTR	host-87-237-172-20.dsl-schweiz.ch
87.237.172.20	A	www.lessi.ch
87.237.172.42	A+PTR	mail.psmurten.ch
87.237.172.46	PTR	host-87-237-172-46.dsl-schweiz.ch
87.237.172.46	A	smtp.schumacherag.ch
87.237.172.65	PTR	server.admin.hofstettler-mode.ch
87.237.172.68	A	mail.primaform.ch
87.237.172.71	PTR	host-87-237-172-71.dsl-schweiz.ch
87.237.172.71	A	mx01.atelier-creas.ch
87.237.172.71	A	mail.a1-construction.ch
87.237.172.84	A	mail.hotelschuetzen.com
87.237.172.102	PTR	host-87-237-172-102.dsl-schweiz.ch
87.237.172.105	PTR	mail.svnh.ch
87.237.172.112	PTR	dc-mail.bstz.ch
87.237.172.112	PTR	srv05.bstz.ch
87.237.172.123	A+PTR	mail.segeca.ch
87.237.172.123	A	server.admin.segeca.ch
87.237.172.138	PTR	host-87-237-172-138.tcnet.ch
87.237.172.147	A	mail.schnellgerber.ch
87.237.172.147	A	mail.vschnell.ch
87.237.172.171	A+PTR	mail.griwaplan.ch
87.237.172.171	A	mail.griwatreuhand.ch
87.237.172.184	A	mail.kkst.ch
87.237.172.186	PTR	host-87-237-172-186.dsl-schweiz.ch
87.237.172.186	A	mail.kuhn-intercoiffure.ch
87.237.172.186	A	mail.teamkuhn.ch
87.237.172.192	A	mail.bewo.ch
87.237.172.199	A+PTR	mail.fruver.ch
87.237.172.199	A	mail.storeservice.ch
87.237.172.219	PTR	host-87-237-172-219.dsl-schweiz.ch
87.237.172.219	A	mail.ilp-switzerland.ch
87.237.172.219	A	mail.sermax.ch
87.237.172.249	A+PTR	ip-nep2016.asp.infopro.ch
87.237.172.253	A	ip-mail.asp.infopro.ch
87.237.172.254	PTR	host-87-237-172-254.tcnet.ch
87.237.172.254	A	ip-dns.infopro.ch
87.237.173.86	PTR	host-87-237-173-86.dsl-schweiz.ch
87.237.173.189	PTR	host-87-237-173-189.dsl-schweiz.ch
87.237.174.239	PTR	host-87-237-174-239.dsl-schweiz.ch
87.237.174.241	A	flyfish.ch
87.237.175.195	PTR	host-87-237-175-195.dsl-schweiz.ch
87.237.175.228	PTR	host-87-237-175-228.dsl-schweiz.ch
87.237.175.228	A	mail.flyfish.ch