Robtex

Up: 193.26.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 193.26.32.0/20
Down right: 193.26.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.26.32.66	A+PTR	pentan1.ruhrgas.com
193.26.32.66	A	proxy1.erdgasonline.de
193.26.32.67	A+PTR	pentan2.ruhrgas.com
193.26.32.67	A	webproxy.ruhrgas.com
193.26.33.234	A	eon-ruhrgas.net
193.26.35.114	A	elstergroup.biz
193.26.35.114	A	elsterindustries.biz
193.26.35.114	A	rgi-online.de
193.26.47.4	PTR	host04.eon-is.com
193.26.47.68	PTR	host68.eon-is.com
193.26.47.69	PTR	host69.eon-is.com
193.26.47.134	PTR	mail5.eon-is.com