Robtex

Up: 123.243.228.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.230.0/24
Down right: 123.243.231.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
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