Robtex

Up: 81.23.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.23.64.0/22
Down right: 81.23.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.23.64.3	A	mail.addexpharma.net
81.23.64.3	A	mail.addexpharmaceuticals.ch
81.23.64.3	A	mail.addex-pharma.ch
81.23.64.10	A	mail.featherlight.ch
81.23.64.76	A	largo.e-xpertsolution.com
81.23.64.76	A	xpsol.ch
81.23.64.76	A	e-xpertsolution.com
81.23.64.81	A+PTR	olrik.e-xpertsolutions.com
81.23.64.84	A	hulk.e-xpertsolutions.net
81.23.65.107	A	mail.deweckperren.ch
81.23.65.107	A	mail.dwpz.ch
81.23.65.130	A+PTR	mail.praxisgroup.ch
81.23.65.130	A	mail.nightingaletrustees.com
81.23.65.130	A	mail.ifmtrust.ch
81.23.65.148	A	exchsrv20.interacid-trading.ch
81.23.65.170	A	oyster-perpetual.cn
81.23.65.170	A	oyster-perpetual.com.cn
81.23.65.170	A	oyster-perpetual.com
81.23.66.12	PTR	gwmail01.syzgroup.com
81.23.66.12	A	gwmail01.oysterfunds.com
81.23.66.12	A	gwmail01.syzbank.net
81.23.67.4	A	mail.dalidemart.com
81.23.69.3	PTR	mailgateway01.dcie.ch
81.23.69.3	A	mail.dcie.ch
81.23.69.12	A	smtp.emcge.com
81.23.69.18	A	mailsrv.dcie.ch
81.23.69.84	PTR	smtp03.blombank.ch
81.23.69.84	A	mail.banorient.ch
81.23.69.87	A	mail.blombank.ch
81.23.69.91	A	smtp01.blombank.ch
81.23.69.117	A+PTR	smtp.pasche.ch
81.23.69.117	A	smtp.cmcic-banquepasche.li
81.23.69.117	A	smtp01.banquehavilland.ch
81.23.69.130	PTR	smtp02.pasche.ch
81.23.69.130	A	smtp02.cmcic-banquepasche.li
81.23.69.130	A	smtp02.agefor.com
81.23.69.147	A+PTR	exchsrv01.ekontrol.net
81.23.69.147	A	mail.ekontrol.net
81.23.69.189	A	linkproof2.safdie.com
81.23.70.11	A	datasrv01.massena.ch
81.23.70.35	A+PTR	mail.atlanticglobal.ch
81.23.71.4	PTR	datasrv01.ehbaumann.com
81.23.71.4	A	crystal-srv.ehbaumann.com
81.23.71.23	PTR	datasrv02.birs.ch
81.23.71.25	A	datasrv01.surcotec.ch
81.23.71.52	A+PTR	datasrv.besuchet.ch
81.23.71.52	A	besuchet.ch
81.23.71.52	A	mail.besuchet.ch