Robtex

Up: 213.196.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 213.196.12.0/25
Down right: 213.196.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.196.12.1	PTR	ge-0-0-31.rtr1.ams-rb.hostnet.nl
213.196.12.4	A	mail.ongelukinduitsland.nl
213.196.12.4	A	mail.flexalu.eu
213.196.12.4	A	mail.fruitschaal.nl
213.196.12.13	A	mail.outlookinside.com
213.196.12.13	A	mail.outlookdisclaimer.com
213.196.12.13	A	mail.outlookgroupcalendar.com
213.196.12.19	PTR	server45.hostnet.nl
213.196.12.19	A	matrion.net
213.196.12.28	A	*.sailcenter.nl
213.196.12.100	A	hosted-desktop.nl
213.196.12.100	A	mail.hosted-desktop.nl
213.196.12.202	A	mx1.makelaardijpieterkooi.nl
213.196.12.203	A	mx2.makelaardijpieterkooi.nl