Robtex

Up: 168.1.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 168.1.20.0/25
Down right: 168.1.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
168.1.20.0	A+PTR	0.14.01a8.ip4.static.sl-reverse.com
168.1.20.2	PTR	168.1.20.2-static.reverse.softlayer.com
168.1.20.11	A+PTR	b.14.01a8.ip4.static.sl-reverse.com
168.1.20.30	PTR	168.1.20.30-static.reverse.softlayer.com
168.1.20.66	A+PTR	web1.graceworldwide.anchor.net.au
168.1.20.66	A	gracerecords.com.au
168.1.20.66	A	grace.com.au
168.1.20.68	A+PTR	web1.slatteryauctions.anchor.net.au
168.1.20.68	A	slatteryassetadvisory.com
168.1.20.68	A	slatteryauctions.com.au
168.1.20.71	A+PTR	web1.apeagers.anchor.net.au
168.1.20.71	A	simplr.com.au
168.1.20.152	PTR	168.1.20.152-static.reverse.softlayer.com
168.1.20.179	PTR	b3.14.01a8.ip4.static.sl-reverse.com
168.1.20.202	PTR	sr777.itsolution.sydney
168.1.20.202	A	ns1.itsolution.sydney
168.1.20.202	A	mail.srimandir.org
168.1.20.214	PTR	d6.14.01a8.ip4.static.sl-reverse.com
168.1.20.214	A	mail.thecentralreview.com
168.1.20.214	A	www.tranquilspaces.com
168.1.20.221	PTR	dd.14.01a8.ip4.static.sl-reverse.com
168.1.20.221	A	cattonhall.com.au
168.1.20.221	A	calgarypetstop.ca