Robtex

Up: 91.138.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 91.138.32.0/20
Down right: 91.138.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.138.32.12	PTR	static-customer.12.32.138.91.yetnet.ch
91.138.32.12	A	owa.yetnet.ch
91.138.32.19	A+PTR	mail.kkg.ch
91.138.32.21	PTR	office.kkg.ch
91.138.32.21	A	mail.fidos.ch
91.138.32.26	A	mail2.kkg.ch
91.138.32.32	PTR	pcsgo.ch
91.138.32.33	PTR	pcsgo.ch
91.138.32.34	PTR	xn--bauteilbrse-yfb.ch
91.138.32.34	A	www.pcsgo.ch
91.138.32.52	A	mail.pcs-go.ch
91.138.32.64	PTR	static-customer.64.32.138.91.yetnet.ch
91.138.32.67	PTR	ns1.schnyder.ch
91.138.32.67	A	mail.kms-lenzburg.ch
91.138.32.67	A	schnyder.ch
91.138.32.71	PTR	static-customer.71.32.138.91.yetnet.ch
91.138.32.72	PTR	static-customer.72.32.138.91.yetnet.ch
91.138.32.99	A+PTR	mail.lean-projects.com
91.138.32.100	A+PTR	sharepoint.lean-projects.com
91.138.32.101	A+PTR	portal.lean-projects.com
91.138.32.130	A	www.alfred-brack.ch
91.138.32.130	A	alfred-brack.ch
91.138.32.146	A+PTR	smtp1.fehlmann.com
91.138.32.146	A	smtp1.fehlmann.de
91.138.32.194	A+PTR	mail.storsys.com
91.138.32.200	PTR	static-customer.200.32.138.91.yetnet.ch
91.138.32.205	A+PTR	demo.resportal.net
91.138.32.229	PTR	static-customer.229.32.138.91.yetnet.ch
91.138.32.229	A	mybiostore.de
91.138.32.229	A	www.yardobio.ch
91.138.32.230	PTR	mailserver.biopartner.ch
91.138.32.232	PTR	static-customer.232.32.138.91.yetnet.ch
91.138.33.19	PTR	static-customer.19.33.138.91.yetnet.ch
91.138.33.19	A	work2net.ch
91.138.33.23	A	work2web.ch
91.138.33.25	PTR	static-customer.25.33.138.91.yetnet.ch
91.138.33.25	A	dns.immotrust-hug.ch
91.138.33.26	A	mail.printit.ch
91.138.33.43	A+PTR	mail.rosta.ch
91.138.33.43	A	mail.rosta.com
91.138.33.58	PTR	mail.bs-ag.ch
91.138.33.58	A	mail.swisswin.ch
91.138.33.58	A	mail.myinka.ch
91.138.33.74	A+PTR	owa.fluekiger.com
91.138.33.76	A	mail.perlenbox.ch
91.138.33.76	A	mail.corepoint.ch
91.138.33.76	A	as.fluekiger.com
91.138.33.82	PTR	owa.daeniken.ch
91.138.33.98	PTR	static-customer.98.33.138.91.yetnet.ch
91.138.33.98	A	mail.heubergerservice.ch
91.138.33.98	A	mail.filr.ch
91.138.33.100	PTR	static-customer.100.33.138.91.yetnet.ch
91.138.33.100	A	ns01.heubergerservice.ch
91.138.33.101	PTR	static-customer.101.33.138.91.yetnet.ch
91.138.33.103	PTR	static-customer.103.33.138.91.yetnet.ch
91.138.33.140	A+PTR	mail.meagag.ch
91.138.33.166	A+PTR	owa.yetnet.ch
91.138.33.210	A+PTR	mx.globogal.ch
91.138.33.210	A	mail.globogal.ch
91.138.35.240	A+PTR	mail2.matho.net
91.138.35.240	A	exchange.nl-web.ch
91.138.35.240	A	mail2.mesaag.ch
91.138.36.4	A+PTR	4-36-138-91.dyn.cable.fcom.ch
91.138.36.4	A	vogtuh.com
91.138.36.11	A+PTR	11-36-138-91.dyn.cable.fcom.ch
91.138.36.57	PTR	57-36-138-91.dyn.cable.fcom.ch
91.138.36.57	A	mail.xen-lab.net
91.138.36.57	A	xen-lab.net
91.138.36.64	A	mail.xen-lab.net
91.138.36.64	A	xen-lab.net
91.138.36.71	A+PTR	71-36-138-91.dyn.cable.fcom.ch
91.138.36.71	A	mail.evelynswonderland.com
91.138.37.186	A+PTR	186-37-138-91.dyn.cable.fcom.ch
91.138.39.18	A+PTR	18-39-138-91.dyn.cable.fcom.ch
91.138.39.18	A	ludescher.info
91.138.39.18	A	ludescher.ch
91.138.40.123	PTR	123-40-138-91.dyn.cable.fcom.ch
91.138.41.90	PTR	90-41-138-91.dyn.cable.fcom.ch
91.138.41.208	PTR	208-41-138-91.dyn.cable.fcom.ch
91.138.41.234	PTR	234-41-138-91.dyn.cable.fcom.ch
91.138.42.60	A+PTR	60-42-138-91.dyn.cable.fcom.ch
91.138.42.60	A	saft.no-ip.org
91.138.42.93	PTR	93-42-138-91.dyn.cable.fcom.ch
91.138.42.93	A	3cx.fbs.ch
91.138.42.126	A+PTR	126-42-138-91.dyn.cable.fcom.ch
91.138.45.109	PTR	109-45-138-91.dyn.cable.fcom.ch
91.138.45.109	A	mail.ofblueday.ch
91.138.46.19	PTR	dyn-cable-customer.19.46.138.91.yetnet.ch
91.138.46.75	A	m3m.ch
91.138.47.52	PTR	52-47-138-91.dyn.cable.fcom.ch
91.138.47.52	A	gnocchi.ch
91.138.47.175	A+PTR	175-47-138-91.dyn.cable.fcom.ch
91.138.47.175	A	saft.no-ip.org
91.138.48.20	PTR	20-48-138-91.dyn.cable.fcom.ch
91.138.48.20	A	speziell.ch
91.138.48.220	PTR	dyn-cable-customer.220.48.138.91.yetnet.ch
91.138.51.48	A	svelos.ch
91.138.51.66	A	mr2.sytes.net
91.138.51.66	A	www.freecardo.com
91.138.55.74	A	mail.huizeken.be
91.138.57.162	A	ludescher.ch