Robtex

Up: 81.21.176.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.21.184.0/22
Down right: 81.21.188.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.21.184.86	A	*.frenckencollege.nl
81.21.184.86	A	mx1.frenckencollege.nl
81.21.184.98	A+PTR	smtp.schoolwerkplek.nl
81.21.184.103	A	mail.speedee.nl
81.21.184.161	A	mail2.commanderijcollege.nl
81.21.184.217	PTR	yesman.aero
81.21.185.2	A	email.gepro-osi.nl
81.21.185.2	A	gepro.nl
81.21.185.2	A	gepro-osi.nl
81.21.185.16	A+PTR	ns2.schoolwerkplek.eu
81.21.185.16	A	ns2.swp.nl
81.21.185.74	A	novaconcepts.nl
81.21.186.5	A	backup.swp.nl
81.21.186.10	A+PTR	ns1.swp.nl
81.21.186.11	PTR	dc01.beheer.swp.nl
81.21.186.11	A	beheer.swp.nl
81.21.186.114	A	magisterplatform.nl
81.21.186.116	A	test.magisterplatform.nl
81.21.186.245	A	gammelbrak.nl
81.21.187.2	PTR	cluster.mwp.nl
81.21.187.2	A	beeckland.nl
81.21.187.2	A	l1lv3te4iq6v9k99ev0c73n9a5i1aqcu.lyceumelst.nl
81.21.187.15	A	guido.mwp.nl
81.21.187.17	A	psg.mwp.nl
81.21.187.17	A	mijnschool.psg.nl
81.21.187.18	A	amersfoortseberg.mwp.nl
81.21.187.18	A	www.amersfoortseberg.nl
81.21.187.32	A	csggaasterland.nl
81.21.187.33	A	cvo-zwfryslan.nl
81.21.187.34	A	*.marnecollege.nl
81.21.187.34	A	www.marnecollege.nl
81.21.187.40	A	*.wdezwijger.nl
81.21.187.43	A	vcl.mwp.nl
81.21.187.50	A	www.veurslyceum.nl
81.21.187.52	A	sgravendreef.mwp.nl
81.21.187.52	A	www.sgravendreefcollege.nl
81.21.187.53	A	novum.mwp.nl
81.21.187.54	A	www.sgravendreefcollege.nl
81.21.187.58	A	staring.mwp.nl
81.21.187.61	A	zwijsen-college.nl
81.21.187.61	A	zwijsen.mwp.nl
81.21.187.61	A	www.zwijsen-college.nl
81.21.187.64	A	www.hmcollege.nl
81.21.187.64	A	hmcweb.hmcollege.nl
81.21.187.64	A	hmlc.mwp.nl
81.21.187.66	A	www.mcvo.nl
81.21.188.85	A	swcint.swp.nl
81.21.188.188	A	rmlint.swp.nl
81.21.188.247	A	singellandint.swp.nl
81.21.189.49	A	raayland.swp.nl
81.21.189.75	A	canisius.swp.nl
81.21.189.87	A	onc.swp.nl
81.21.189.94	A	vozuid.swp.nl
81.21.189.115	A	heemlanden.swp.nl
81.21.189.121	A	wolfert.swp.nl
81.21.189.142	A	ams.swp.nl
81.21.189.148	A	hpc.swp.nl
81.21.189.150	A	grotiuscollege.swp.nl
81.21.189.155	A	jeroen.swp.nl
81.21.189.178	A	veenlanden.swp.nl
81.21.189.180	A	groenehart.swp.nl
81.21.189.182	A	amsterdams.swp.nl
81.21.189.188	A	rml.swp.nl
81.21.189.201	A	minkema.swp.nl
81.21.189.216	A	sv.swp.nl
81.21.189.229	A	daltonvoorburg.swp.nl
81.21.189.250	A	cursusmasterplan.swp.nl
81.21.190.65	A	ludgerint.swp.nl
81.21.190.160	A	deredeint.swp.nl
81.21.190.196	A	spinozaint.swp.nl
81.21.191.8	A	helpdesk.swp.nl
81.21.191.44	A	magister.willem2.nl
81.21.191.44	A	willem2.swp.nl
81.21.191.48	A	dc.swp.nl
81.21.191.79	A	passie.swp.nl
81.21.191.112	A	vossius.swp.nl
81.21.191.132	A	jeroenbosch.swp.nl
81.21.191.133	A	sgtongerlo.swp.nl
81.21.191.146	A	varendonck.swp.nl
81.21.191.149	A	jvo.swp.nl
81.21.191.152	A	ulenhof.swp.nl
81.21.191.154	A	kalsbeek.swp.nl
81.21.191.164	A	mencia.swp.nl
81.21.191.169	A	lodenstein.swp.nl
81.21.191.175	A	chrlyceumdelft.swp.nl
81.21.191.181	A	trevianum.swp.nl
81.21.191.195	A	morgencollege.swp.nl
81.21.191.197	A	odulphus.swp.nl
81.21.191.198	A	guido.swp.nl
81.21.191.213	A	02yh.swp.nl
81.21.191.223	A	waerdenborch.swp.nl
81.21.191.235	A	dockinga.swp.nl
81.21.191.239	A	overlaat.swp.nl