Robtex

Up: 217.20.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 217.20.0.0/23
Down right: 217.20.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.20.0.2	A+PTR	uniserv.uniplan.it
217.20.0.2	A	postfix.uniplan.it
217.20.0.2	A	www.uniplan.it
217.20.0.3	PTR	uniserv1.uniplan.it
217.20.0.11	A+PTR	mail.uniplan.it
217.20.0.13	A+PTR	locri.ra-di-o.it
217.20.0.13	A	ra-di-o.it
217.20.0.14	A	mail2.uniplan.it
217.20.0.30	A	webserver.uniplan.it
217.20.0.31	A	mailserver.uniplan.it
217.20.0.71	A	composizione.it
217.20.0.71	A	www.composizioni.it
217.20.0.73	PTR	pippo.listlabs.it
217.20.0.73	A	uniplanlabs.it
217.20.0.73	A	ruins.it
217.20.0.80	PTR	planhouse.natum.it
217.20.0.90	A	natum.it
217.20.0.90	A	rodolfovitolo.it
217.20.0.90	A	anova.it
217.20.0.113	A	gioiatauro.geotrace.it
217.20.0.157	A	cnet.uniplan.it
217.20.0.158	PTR	ubcs07.uniplan.it
217.20.0.158	A	geotrace.it
217.20.0.158	A	www.uniplansoftware.it
217.20.0.160	A	sarim.geotrace.it
217.20.0.160	A	ecoambiente.geotrace.it
217.20.0.178	A	uniot.it
217.20.0.181	A+PTR	www.carbonaradinola.ra-di-o.it
217.20.0.181	A	ra-di-o.it
217.20.0.181	A	www.ostuni.ra-di-o.it
217.20.0.193	A	scafati-wgis.itinerarituristici.it
217.20.0.195	A+PTR	pippo.ra-di-o.it
217.20.0.246	A+PTR	clessidra.mexall.it
217.20.0.247	PTR	www.serravalle1.geotrace.it
217.20.1.3	A	uniplanelectronics.eu
217.20.1.3	A	uniplanelectronics.it
217.20.1.30	A	portodigenova.it
217.20.1.30	A	labuanviaggi.it
217.20.1.30	A	microtecnologie.it
217.20.1.101	A	rodolfovitolo.it
217.20.1.101	A	gaiadenicola.it
217.20.1.101	A	teklastyle.it