Robtex

Up: 192.41.226.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.41.227.0/25
Down right: 192.41.227.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.41.227.3	A+PTR	time.ise.fhg.de
192.41.227.3	A+PTR	timeserver-external.ise.fhg.de
192.41.227.3	A+PTR	ts.ise.fhg.de
192.41.227.4	A+PTR	time.ise.fhg.de
192.41.227.4	A+PTR	timeserver-external.ise.fhg.de
192.41.227.4	A+PTR	ts.ise.fhg.de
192.41.227.74	A	th.ise.fhg.de
192.41.227.75	A+PTR	sg.ise.fhg.de
192.41.227.88	A+PTR	att.ise.fhg.de
192.41.227.100	A+PTR	news-ext.ise.fhg.de
192.41.227.100	PTR	news-gw.ise.fhg.de