Robtex

Up: 212.121.104.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.121.104.0/25
Down right: 212.121.104.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.121.104.35	PTR	rt104bb121-212-35.routit.net
212.121.104.35	A	mail.luxaflex.nl
212.121.104.35	A	mail.luxaflex-nederland.nl
212.121.104.52	PTR	rt104bb121-212-52.routit.net
212.121.104.52	A	t-e-c-h-n-o-w-l-e-d-g-e.de
212.121.104.52	A	orthovizier.nl
212.121.104.68	A	vpn.hiwa.nl
212.121.104.98	PTR	kantoor.nl-jobs.com
212.121.104.99	PTR	rt104bb121-212-99.routit.net
212.121.104.106	A+PTR	kantoor.sockshouse.nl
212.121.104.106	A	webmail.sockshouse.nl
212.121.104.106	A	mail.sockshouse.nl
212.121.104.114	PTR	rt104bb121-212-114.routit.net
212.121.104.124	PTR	rt104bb121-212-124.routit.net
212.121.104.169	A	mx1.dutchservicegroep.nl
212.121.104.169	A	mx1.dutchservicegroup.nl
212.121.104.176	PTR	rt104bb121-212-176.routit.net
212.121.104.176	A	mail.delangekeizer.nl
212.121.104.177	A	mail.douque.com
212.121.104.180	PTR	rt104bb121-212-180.routit.net
212.121.104.194	A	brace-automotive.com
212.121.104.195	PTR	rt104bb121-212-195.routit.net
212.121.104.195	A	brace-automotive.com
212.121.104.195	A	www.brace-automotive.com
212.121.104.206	A	routit-airport.nl
212.121.104.214	PTR	rt104bb121-212-214.routit.net
212.121.104.214	A	mail.imtrans.nl
212.121.104.217	PTR	rt104bb121-212-217.routit.net
212.121.104.226	PTR	rt104bb121-212-226.routit.net
212.121.104.243	PTR	rt104bb121-212-243.routit.net
212.121.104.243	A	mx1.sasservices.it
212.121.104.243	A	mx2.sasservices.it
212.121.104.250	A	remote.bnmotoren.nl