Robtex

Up: 5.10.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 5.10.192.0/25
Down right: 5.10.192.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.10.192.0	PTR	0.192.10.5.in-addr.arpa
5.10.192.2	A+PTR	ns1.eun.wipabv.net
5.10.192.3	A+PTR	smtp1.wipabv.net
5.10.192.4	A	smtp2.wipabv.net
5.10.192.5	PTR	smtp2.wipabv.net
5.10.192.10	A	email.bontekoe.info
5.10.192.10	A	spam-relay.wipabv.net
5.10.192.10	A	spam-relay.daasonline.nl
5.10.192.50	A	mx1.wipabv.net
5.10.192.87	PTR	geelhoed.eun.wipabv.net
5.10.192.115	A+PTR	mail.itadvice.de