Robtex

Up: 123.243.242.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.242.0/25
Down right: 123.243.242.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.242.1	A+PTR	123-243-242-1.tpgi.com.au
123.243.242.2	A	123-243-242-2.tpgi.com.au
123.243.242.3	A	123-243-242-3.tpgi.com.au
123.243.242.4	A	123-243-242-4.tpgi.com.au
123.243.242.5	A	123-243-242-5.tpgi.com.au
123.243.242.6	A	123-243-242-6.tpgi.com.au
123.243.242.7	A	123-243-242-7.tpgi.com.au
123.243.242.8	A	123-243-242-8.tpgi.com.au
123.243.242.9	A	123-243-242-9.tpgi.com.au
123.243.242.22	A+PTR	123-243-242-22.tpgi.com.au
123.243.242.26	A+PTR	123-243-242-26.tpgi.com.au
123.243.242.34	A+PTR	123-243-242-34.tpgi.com.au
123.243.242.41	A+PTR	123-243-242-41.tpgi.com.au
123.243.242.54	A+PTR	123-243-242-54.tpgi.com.au
123.243.242.55	A+PTR	123-243-242-55.tpgi.com.au
123.243.242.74	A	123-243-242-74.tpgi.com.au
123.243.242.85	A+PTR	123-243-242-85.tpgi.com.au
123.243.242.96	A+PTR	123-243-242-96.tpgi.com.au
123.243.242.98	PTR	123-243-242-98.tpgi.com.au
123.243.242.102	A+PTR	123-243-242-102.tpgi.com.au
123.243.242.113	A+PTR	123-243-242-113.tpgi.com.au
123.243.242.118	A+PTR	123-243-242-118.tpgi.com.au
123.243.242.129	A+PTR	123-243-242-129.tpgi.com.au
123.243.242.160	A	123-243-242-160.tpgi.com.au
123.243.242.163	A+PTR	123-243-242-163.tpgi.com.au
123.243.242.164	A	slardar.net
123.243.242.170	A+PTR	123-243-242-170.tpgi.com.au
123.243.242.191	A+PTR	123-243-242-191.tpgi.com.au
123.243.242.202	A	123-243-242-202.tpgi.com.au
123.243.242.209	A+PTR	123-243-242-209.tpgi.com.au
123.243.242.229	A+PTR	123-243-242-229.tpgi.com.au
123.243.242.233	A+PTR	123-243-242-233.tpgi.com.au
123.243.242.238	A+PTR	123-243-242-238.tpgi.com.au
123.243.242.240	PTR	blue.hermes.net.au
123.243.242.240	A	jac-ans.net
123.243.242.240	A	davidscheel.com