Robtex

Up: 193.28.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 193.28.5.0/25
Down right: 193.28.5.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.28.5.1	PTR	inet.texion.eu
193.28.5.1	A	webmail.texion.eu
193.28.5.1	A	inet.pley.org
193.28.5.3	A+PTR	mail.pley.org
193.28.5.4	A+PTR	pley.de
193.28.5.152	PTR	home.pley.org
193.28.5.153	A+PTR	martin.pley.org