Robtex

Up: 217.18.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.18.81.0/25
Down right: 217.18.81.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.18.81.1	PTR	beequick.nse.co.uk
217.18.81.1	A	www.netsolutionseurope.com
217.18.81.1	A	mailserver1.nseuk.org
217.18.81.2	PTR	spock.nse.co.uk
217.18.81.2	A	mailserver2.coyfamily.com
217.18.81.2	A	mailserver2.officebox.co.uk
217.18.81.80	PTR	vip-80-spock.nse.co.uk
217.18.81.80	A	yachtfone.com
217.18.81.80	A	www.boatfone.com
217.18.81.85	PTR	vip-85-spock.nse.co.uk
217.18.81.85	A	propertybox.com
217.18.81.85	A	mailserver2.propertybox.net
217.18.81.143	A+PTR	fastnet.nse.co.uk