Robtex

Up: 91.90.144.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.90.144.0/25
Down right: 91.90.144.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.90.144.0	PTR	network.muc1.mivitec.net
91.90.144.2	A	bacula2.mivitec.net
91.90.144.3	A	server443.mivitec.net
91.90.144.5	PTR	server0.mivitec.net
91.90.144.5	PTR	server445.mivitec.net
91.90.144.5	A	faxgw.de
91.90.144.7	A+PTR	debian2354.mivitec.net
91.90.144.10	PTR	mailscanner.mivitec.net
91.90.144.10	A	mail.handtake.com
91.90.144.10	A	mail.winprofi.de
91.90.144.15	PTR	server4415.mivitec.net
91.90.144.15	A	business-continuity-solutions.info
91.90.144.15	A	business-continuity-solutions.eu
91.90.144.16	PTR	server4416.mivitec.net
91.90.144.16	A	liebesschaukel-bestellen.de
91.90.144.16	A	mail.liebesschaukel-bestellen.de
91.90.144.17	A+PTR	service-l.mivitec.net
91.90.144.20	PTR	server4420.mivitec.net
91.90.144.20	A	plan-solutions.de
91.90.144.20	A	mail2.plansolutions.de
91.90.144.36	PTR	o-r-d-e-r.net
91.90.144.36	A	derregistrar.com
91.90.144.36	A	derregistrar.de
91.90.144.41	A+PTR	server4441.mivitec.net
91.90.144.45	PTR	server4445.mivitec.net
91.90.144.45	A	mail.fax-gw.de
91.90.144.45	A	mail.faxgw.de
91.90.144.53	PTR	dns2.mivitec.net
91.90.144.53	A	dns2.winprofi.de
91.90.144.53	A	ns2.serversofort.de
91.90.144.66	A	*.mivitec.com
91.90.144.66	A	ns1.mivitec.com
91.90.144.70	A	rz-muenchen.mivitec.net
91.90.144.87	A+PTR	support.mivitec.net
91.90.144.90	A	mail.mivitec-tv.de
91.90.144.90	A	mivitec-tv.de
91.90.144.96	A	updates.mivitec.net
91.90.144.99	A	service.mivitec.net
91.90.144.102	A+PTR	noc-fw.mivitec.net
91.90.144.123	PTR	server44123.mivitec.net
91.90.144.123	A	mail.clipbutler.de
91.90.144.123	A	power-sexshop.de
91.90.144.126	A	mail.kirche-suelz-klettenberg.de
91.90.144.128	PTR	server44128.mivitec.net
91.90.144.128	A	sbs11.mivitec.biz
91.90.144.130	PTR	mailout.mivitec.net
91.90.144.132	PTR	server44132.mivitec.net
91.90.144.139	A+PTR	mailscanner3.mivitec.net
91.90.144.139	A	mail.baruwa.mivitec.net
91.90.144.139	A	mail.mailscanner3.mivitec.net
91.90.144.194	PTR	mivitec.de
91.90.144.194	A	schoten24.de
91.90.144.194	A	mail.meinbackup.at
91.90.144.200	A	server44200.mivitec.net
91.90.144.211	A+PTR	mailscanner2.mivitec.net
91.90.144.211	A	mx2.muenchner.de
91.90.144.211	A	mailscanner2.datacenter.mivitec.net
91.90.144.212	PTR	mailscanner2.mivitec.net
91.90.144.220	PTR	mx-int.mivitec.net
91.90.144.220	A	mail.mivitec.com
91.90.144.220	A	mail.mivitec.de
91.90.144.222	A	datacenter.mivitec.net
91.90.144.225	PTR	server44225.mivitec.net
91.90.144.234	PTR	server44234.mivitec.net
91.90.144.252	A	mail.datacenter-munich.com
91.90.144.252	A	mail.munich-datacenter.com
91.90.144.252	A	datacenter-munich.com