Robtex

Up: 81.7.224.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.7.232.0/22
Down right: 81.7.236.0/22

IP	Type	Hostname
81.7.233.2	PTR	ns1648.ztomy.com
81.7.233.48	PTR	host-81-7-233-48.static.solpa.net
81.7.234.43	PTR	emailsec.vitodata.ch
81.7.234.81	A+PTR	81-7-234-81.static.cablecom.ch
81.7.234.138	PTR	81-7-234-138.static.cablecom.ch
81.7.234.158	A	ns1.cclhost.ch
81.7.234.165	A	mx1.servercentral.ch
81.7.234.165	A	mx1.ingenta.ch
81.7.234.165	A	81.7.234.165.ingenta.ch
81.7.234.166	A	mx2.ingenta.ch
81.7.234.241	A+PTR	mx10.spitalzollikerberg.ch
81.7.234.241	A	mail.mrbond.ch
81.7.234.242	A+PTR	81-7-234-242.static.cablecom.ch
81.7.234.243	PTR	81-7-234-243.static.cablecom.ch
81.7.234.244	A	rio-pool.ch
81.7.234.248	A+PTR	81-7-234-248.static.cablecom.ch
81.7.234.249	A+PTR	81-7-234-249.static.cablecom.ch
81.7.234.250	PTR	81-7-234-250.static.cablecom.ch
81.7.234.251	PTR	81-7-234-251.static.cablecom.ch
81.7.234.252	A	81-7-234-252.static.cablecom.ch
81.7.234.253	A	81-7-234-253.static.cablecom.ch
81.7.236.30	A	mx02.stabilizer2000.com
81.7.236.30	A	mx02.interstein.com
81.7.236.49	PTR	81-7-236-49.static.cablecom.net
81.7.236.58	PTR	81-7-236-58.static.cablecom.net
81.7.236.58	A	webportal-gateway.solarmax.com
81.7.236.58	A	solarmaxmail.de
81.7.236.115	A+PTR	mail.sager.ch
81.7.236.115	A	mail.wiegla.de
81.7.237.2	A	p01wetnwfw01.pestalozzi.com
81.7.237.3	A	p01wetnwfw02.pestalozzi.com
81.7.237.34	A+PTR	isis1.green-pack.ch
81.7.237.61	A	gaia.datatransit.org
81.7.237.69	A	webmail.toponline.ch
81.7.237.69	A	smtp.toponline.ch
81.7.237.69	A	gateway.toponline.ch
81.7.237.71	A	redaktion.radiotop.ch
81.7.237.72	PTR	81-7-237-72.static.cablecom.net
81.7.237.100	A	akermann.ch
81.7.237.100	A	mail.akermann.ch
81.7.237.100	A	*.akermann.ch
81.7.237.196	A	mail01.pool-informatik.com
81.7.237.197	A	mail.simoninis.ch
81.7.237.197	A	mail.kinderkrebs.ch
81.7.237.197	A	mail.powermail.ch
81.7.237.200	PTR	owa.pool-rz.ch