Robtex

Up: 192.153.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.153.5.0/25
Down right: 192.153.5.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.153.5.1	A+PTR	avantwireless.com
192.153.5.1	PTR	backdeck.com
192.153.5.1	A+PTR	mail.avantwireless.com
192.153.5.10	A+PTR	router.backdeck.com
192.153.5.20	A+PTR	dns.avantwireless.com
192.153.5.20	A+PTR	dualie.avantwireless.com
192.153.5.20	A+PTR	ns2.avantwireless.com
192.153.5.56	A	jpengnv.com
192.153.5.142	A	mail.diloretoreno.com
192.153.5.149	A+PTR	mail.wm7d.net
192.153.5.149	A	yostguns.com
192.153.5.149	A	ns.wm7d.net