Robtex

Up: 193.141.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.141.0.0/23
Down right: 193.141.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.141.0.0	PTR	193-141-0-0.as286.net
193.141.0.50	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.0.59	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.0.72	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.0.82	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.0.255	PTR	193-141-0-255.as286.net
193.141.1.0	PTR	193-141-1-0.as286.net
193.141.1.1	PTR	193-141-1-1.de.kpn-eurorings.net
193.141.1.4	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.1.98	PTR	193-141-1-98.de.kpn-eurorings.net
193.141.1.103	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.1.117	PTR	193-141-1-117.de.kpn-eurorings.net
193.141.1.197	PTR	193-141-1-197.de.kpn-eurorings.net
193.141.1.255	PTR	193-141-1-255.as286.net
193.141.2.2	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.2.2	A	nidan.de.kpn-eurorings.net
193.141.2.101	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.2.149	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.2.175	PTR	unused-static-pa.de.kpn-eurorings.net
193.141.2.255	PTR	193-141-2-255.as286.net
193.141.3.6	A+PTR	ulm.nic.xlink.net
193.141.3.6	A	ns1.strato.de
193.141.3.6	A	ns1.strato.com
193.141.3.10	A	gabi-schwarzmann.de
193.141.3.10	A	mardak.de
193.141.3.10	A	labaguette-ka.de
193.141.3.65	PTR	a01.rzone.de
193.141.3.65	A	sr-data.eu
193.141.3.65	A	silentgreen.de
193.141.3.66	PTR	a02.rzone.de
193.141.3.67	PTR	a03.rzone.de
193.141.3.68	PTR	a04.rzone.de
193.141.3.68	A	frick-immobilien.net
193.141.3.68	A	wohlige-entspannung.de
193.141.3.69	PTR	a05.rzone.de
193.141.3.70	PTR	a06.rzone.de
193.141.3.71	PTR	a07.rzone.de
193.141.3.72	PTR	a08.rzone.de
193.141.3.72	A	interrescue.de
193.141.3.72	A	leiss-juengert.de
193.141.3.73	PTR	a09.rzone.de
193.141.3.74	PTR	a0a.rzone.de
193.141.3.75	PTR	a0b.rzone.de
193.141.3.77	A	funnytamil.com
193.141.3.77	A	operational-research.info
193.141.3.77	A	raptastisch.net