Robtex

Up: 123.243.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.240.0/25
Down right: 123.243.240.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.240.1	A+PTR	123-243-240-1.tpgi.com.au
123.243.240.2	A	123-243-240-2.tpgi.com.au
123.243.240.3	A+PTR	123-243-240-3.tpgi.com.au
123.243.240.4	A	123-243-240-4.tpgi.com.au
123.243.240.5	A	123-243-240-5.tpgi.com.au
123.243.240.6	A	123-243-240-6.tpgi.com.au
123.243.240.7	A	123-243-240-7.tpgi.com.au
123.243.240.8	A	123-243-240-8.tpgi.com.au
123.243.240.9	A	123-243-240-9.tpgi.com.au
123.243.240.26	A+PTR	123-243-240-26.tpgi.com.au
123.243.240.59	A	mail.stumpit.com.au
123.243.240.59	A	stumpit.com.au
123.243.240.59	A	sydneybathroomsupplies.net.au
123.243.240.61	A	renovationtalk.com.au
123.243.240.62	A	mail.thetenderwriter.com.au
123.243.240.62	A	thetenderwriter.com.au
123.243.240.100	PTR	123-243-240-100.tpgi.com.au
123.243.240.100	A	mail.amsredfern.org.au
123.243.240.134	A	remote.damshel.net
123.243.240.138	A	mail.eternal.id.au
123.243.240.142	PTR	123-243-240-142.tpgi.com.au
123.243.240.164	A+PTR	123-243-240-164.tpgi.com.au
123.243.240.164	A	mx1.alx.jcdecaux.com.au
123.243.240.170	A	concordaust.com
123.243.240.171	A	icpfirefly.com.au
123.243.240.196	A	exchange.osmicro.net.au