Robtex

Up: 123.100.102.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.100.102.0/25
Down right: 123.100.102.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.100.102.8	PTR	8-102-100-123.vocus.net.nz
123.100.102.18	PTR	123-100-102-18.maxnet.net.nz
123.100.102.25	A	smtp.dolmar.co.nz
123.100.102.26	A	gateway.dolmar.co.nz
123.100.102.29	PTR	gateway.makita.co.nz
123.100.102.32	PTR	32-102-100-123.vocus.net.nz
123.100.102.37	PTR	123-100-102-37.maxnet.net.nz
123.100.102.37	A	securedsigning.com.au
123.100.102.37	A	securedsigning.co.nz
123.100.102.63	PTR	63-102-100-123.vocus.net.nz
123.100.102.75	PTR	75-102-100-123.vocus.net.nz
123.100.102.78	PTR	78-102-100-123.vocus.net.nz
123.100.102.80	PTR	80-102-100-123.vocus.net.nz
123.100.102.81	PTR	123-100-102-81.maxnet.net.nz
123.100.102.82	PTR	123-100-102-82.maxnet.net.nz
123.100.102.82	A	trillionbiz.com
123.100.102.82	A	extreme.co.nz
123.100.102.88	PTR	88-102-100-123.vocus.net.nz
123.100.102.89	PTR	89-102-100-123.vocus.net.nz
123.100.102.110	PTR	123-100-102-110.maxnet.net.nz
123.100.102.110	A	performancerewards.co.nz
123.100.102.110	A	stil.co.nz
123.100.102.113	PTR	113-102-100-123.vocus.net.nz
123.100.102.114	PTR	123-100-102-114.maxnet.net.nz
123.100.102.119	PTR	119-102-100-123.vocus.net.nz
123.100.102.121	PTR	123-100-102-121.maxnet.net.nz
123.100.102.121	A	dmsexpress.com
123.100.102.121	A	www.dmsexpress.com
123.100.102.129	PTR	129-102-100-123.vocus.net.nz
123.100.102.131	PTR	123-100-102-131.maxnet.net.nz
123.100.102.133	PTR	133-102-100-123.vocus.net.nz
123.100.102.137	PTR	137-102-100-123.vocus.net.nz
123.100.102.141	PTR	141-102-100-123.vocus.net.nz
123.100.102.142	PTR	142-102-100-123.vocus.net.nz
123.100.102.163	A	smtp2.livemail.co.nz
123.100.102.163	A	smtp.doonans.co.nz
123.100.102.163	A	livemail.co.nz
123.100.102.178	PTR	178-102-100-123.vocus.net.nz
123.100.102.187	PTR	187-102-100-123.vocus.net.nz
123.100.102.189	PTR	189-102-100-123.vocus.net.nz
123.100.102.190	PTR	190-102-100-123.vocus.net.nz
123.100.102.201	PTR	201-102-100-123.vocus.net.nz
123.100.102.203	A	smtp.mashtrust.org.nz
123.100.102.205	PTR	205-102-100-123.vocus.net.nz
123.100.102.207	PTR	207-102-100-123.vocus.net.nz
123.100.102.208	PTR	208-102-100-123.vocus.net.nz
123.100.102.224	PTR	123-100-102-224.maxnet.net.nz
123.100.102.228	A	mail.technoform-anz.com
123.100.102.246	PTR	123-100-102-246.maxnet.net.nz
123.100.102.250	A	mail.dpod.com
123.100.102.255	PTR	255-102-100-123.vocus.net.nz