Robtex

Up: 217.12.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 217.12.152.0/22
Down right: 217.12.156.0/22

IP	Type	Hostname
217.12.152.22	A+PTR	turk.server.as25501.net
217.12.152.37	A+PTR	sw4.device.as25501.net
217.12.152.199	A+PTR	lyon.ilo.as25501.net
217.12.152.202	A+PTR	pico.ilo.as25501.net
217.12.153.8	A	backup.peerex.net
217.12.153.9	A+PTR	alamo.server.as25501.net
217.12.153.10	A	web3.peerex.net
217.12.153.12	A+PTR	ns1.server.as25501.net
217.12.153.21	A+PTR	imgconf1.server.as25501.net
217.12.153.22	A	ellis.server.as25501.net
217.12.153.22	A	mx.staff.service.as25501.net
217.12.153.29	A+PTR	mr3.peerex.net
217.12.153.31	A+PTR	jaffrey.spidererrol.co.uk
217.12.153.33	A+PTR	update.server.as25501.net
217.12.153.66	A	svn.peerex.net
217.12.153.67	A+PTR	queue.service.as25501.net
217.12.153.67	A	queue.peerex.net
217.12.153.70	A	vpn.peerex.net
217.12.153.72	A+PTR	mx3.peerex.net
217.12.153.79	A	web1.peerex.net
217.12.153.83	A+PTR	market.server.as25501.net
217.12.153.83	A	market.peerex.net
217.12.153.85	A+PTR	www.galaxy4.co.uk
217.12.154.9	A+PTR	sw3.mafooweb.network.as25501.net
217.12.154.9	A	gw.mafooweb.peerex.net
217.12.154.10	A	sw4.mafooweb.network.as25501.net
217.12.154.10	A	mx.berlitz.eu
217.12.154.12	A	mx.berlitz.eu
217.12.154.13	PTR	mukota.mafoo.org
217.12.155.1	A	rye.peerex.net
217.12.155.1	A	lyme.peerex.net
217.12.156.1	PTR	br1.zenlan.network.as25501.net
217.12.156.1	A	br1.server.as25501.net