Robtex

Up: 192.135.6.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.135.7.0/25
Down right: 192.135.7.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.135.7.1	PTR	core-gw.ffm0.upstream.as
192.135.7.3	PTR	jupiter.upstream.as
192.135.7.3	A	ns4.pbk2.de
192.135.7.10	A+PTR	castor.regio.net
192.135.7.10	A	mail-in.pbk2.de
192.135.7.10	A	mx1.pylori.de
192.135.7.12	A+PTR	mail0.de.regio.net
192.135.7.12	A	mx2.regio.net
192.135.7.20	A+PTR	mail1.de.regio.net
192.135.7.26	A+PTR	otrs.regio.net
192.135.7.176	A+PTR	on2.regio.net