Robtex

Up: 123.243.224.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.228.0/23
Down right: 123.243.230.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.228.6	A+PTR	123-243-228-6.static.tpgi.com.au
123.243.228.7	A+PTR	123-243-228-7.static.tpgi.com.au
123.243.228.10	PTR	123-243-228-10.static.tpgi.com.au
123.243.228.16	A+PTR	123-243-228-16.static.tpgi.com.au
123.243.228.16	A	gumify.com
123.243.228.16	A	mail.gumify.com
123.243.228.23	A+PTR	123-243-228-23.static.tpgi.com.au
123.243.228.27	A+PTR	123-243-228-27.static.tpgi.com.au
123.243.228.29	A+PTR	123-243-228-29.static.tpgi.com.au
123.243.228.34	A+PTR	123-243-228-34.static.tpgi.com.au
123.243.228.35	A+PTR	123-243-228-35.static.tpgi.com.au
123.243.228.43	A+PTR	123-243-228-43.static.tpgi.com.au
123.243.228.65	A+PTR	123-243-228-65.static.tpgi.com.au
123.243.228.81	A+PTR	123-243-228-81.static.tpgi.com.au
123.243.228.88	PTR	mail.ataust.com.au
123.243.228.95	A+PTR	123-243-228-95.static.tpgi.com.au
123.243.228.99	A+PTR	123-243-228-99.static.tpgi.com.au
123.243.228.101	A+PTR	123-243-228-101.static.tpgi.com.au
123.243.228.103	A+PTR	123-243-228-103.static.tpgi.com.au
123.243.228.134	A+PTR	123-243-228-134.static.tpgi.com.au
123.243.228.147	A	123-243-228-147.static.tpgi.com.au
123.243.228.158	A+PTR	123-243-228-158.static.tpgi.com.au
123.243.228.169	A+PTR	123-243-228-169.static.tpgi.com.au
123.243.228.177	A+PTR	123-243-228-177.static.tpgi.com.au
123.243.228.181	A+PTR	123-243-228-181.static.tpgi.com.au
123.243.228.182	A	123-243-228-182.static.tpgi.com.au
123.243.228.190	A+PTR	123-243-228-190.static.tpgi.com.au
123.243.228.204	A+PTR	123-243-228-204.static.tpgi.com.au
123.243.228.205	PTR	123-243-228-205.static.tpgi.com.au
123.243.228.205	A	ns.sturgislumber.com
123.243.228.205	A	home.datamine.tk
123.243.228.214	A+PTR	123-243-228-214.static.tpgi.com.au
123.243.228.228	A+PTR	123-243-228-228.static.tpgi.com.au
123.243.228.232	A+PTR	123-243-228-232.static.tpgi.com.au
123.243.228.253	PTR	123-243-228-253.static.tpgi.com.au
123.243.228.255	A+PTR	123-243-228-255.static.tpgi.com.au
123.243.229.26	PTR	123-243-229-26.static.tpgi.com.au
123.243.229.92	A+PTR	123-243-229-92.tpgi.com.au
123.243.229.120	PTR	123-243-229-120.static.tpgi.com.au
123.243.229.120	A	ns1.cypcopic.com.au
123.243.229.120	A	liam1.nethack.net
123.243.230.63	PTR	123-243-230-63.static.tpgi.com.au
123.243.230.63	A	mail.guardiansolutions.com.au
123.243.230.69	PTR	123-243-230-69.static.tpgi.com.au
123.243.230.69	A	mail.mmcentre.com.au
123.243.230.70	A	mail.adaptive-is.com.au
123.243.230.203	PTR	123-243-230-203.static.tpgi.com.au
123.243.230.203	A	domesticsecurity.com.au
123.243.230.203	A	mail.domesticsecurity.com.au
123.243.231.176	A	seraphina.com.au
123.243.231.197	PTR	123-243-231-197.static.tpgi.com.au
123.243.231.197	A	www.cresswickgardensholidayunits.com
123.243.231.197	A	mail.naroomaonline.com
123.243.231.207	A	123-243-231-207.static.tpgi.com.au