Robtex

Up: 123.100.66.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.100.67.0/25
Down right: 123.100.67.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.100.67.1	PTR	123-100-67-1.maxnet.net.nz
123.100.67.19	PTR	123-100-67-19.maxnet.net.nz
123.100.67.71	A	homepages.maxnet.co.nz
123.100.67.113	PTR	www01.vocus.net.nz
123.100.67.113	A	cosnet.co.nz
123.100.67.113	A	124-198-137-180.dynamic.dsl.maxnet.co.nz
123.100.67.138	A+PTR	revenge.maxnet.net.nz
123.100.67.139	A	magnificent.maxnet.net.nz
123.100.67.143	PTR	royaloak.maxnet.net.nz
123.100.67.153	A+PTR	quinn.maxnet.net.nz
123.100.67.158	A	smtp02.maxnet.net.nz
123.100.67.163	A	lightspeed.maxnet.net.nz
123.100.67.169	PTR	vip-mailstore-01.maxnet.net.nz
123.100.67.169	A	imap.maxnet.net.nz
123.100.67.169	A	pop3.maxnet.co.nz
123.100.67.182	A+PTR	mx-in.vocus.net.nz
123.100.67.183	A	guardian.vocus.net.nz
123.100.67.184	A+PTR	grayson.vocus.net.nz
123.100.67.185	A	sam.vocus.net.nz
123.100.67.192	PTR	123-100-67-192.maxnet.net.nz
123.100.67.196	A+PTR	mangere.vocus.net.nz
123.100.67.222	PTR	vip-nsauth-01.maxnet.net.nz
123.100.67.222	A	ns1.isystems.co.nz
123.100.67.222	A	ns.maxnetnz.com
123.100.67.223	PTR	vip-nsauth-02.maxnet.net.nz
123.100.67.225	PTR	vip-smtp-01.maxnet.net.nz
123.100.67.225	A	smtp-vip.maxnet.net.nz
123.100.67.225	A	smtp.maxnet.co.nz
123.100.67.226	PTR	vip-maxweb-01-alb.maxnet.net.nz
123.100.67.226	A	www.maxnet.net.nz
123.100.67.226	A	202-89-55-142.vocus.co.nz
123.100.67.241	A+PTR	ns01.vocus.net.au
123.100.67.241	A	ns01.vocus.com.au
123.100.67.241	A	ns01.vocus.net.nz
123.100.67.253	A+PTR	lockheed.vocus.net.nz
123.100.67.253	A	maxnet.net.nz
123.100.67.253	A	netguardian.co.nz