Robtex

Up: 123.243.224.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.224.0/23
Down right: 123.243.226.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.224.63	A+PTR	123-243-224-63.static.tpgi.com.au
123.243.224.71	PTR	123-243-224-71.static.tpgi.com.au
123.243.224.75	PTR	123-243-224-75.static.tpgi.com.au
123.243.224.75	A	mail.genesysit.com.au
123.243.224.75	A	ns1.genesysit.com.au
123.243.224.95	A+PTR	123-243-224-95.static.tpgi.com.au
123.243.224.100	A+PTR	123-243-224-100.static.tpgi.com.au
123.243.224.111	A+PTR	123-243-224-111.static.tpgi.com.au
123.243.224.113	A+PTR	123-243-224-113.static.tpgi.com.au
123.243.224.147	A+PTR	123-243-224-147.static.tpgi.com.au
123.243.224.147	A	mail.unixservice.com.au
123.243.224.147	A	naomi.unixservice.com.au
123.243.224.168	A+PTR	123-243-224-168.static.tpgi.com.au
123.243.224.177	A+PTR	123-243-224-177.static.tpgi.com.au
123.243.224.184	A+PTR	123-243-224-184.static.tpgi.com.au
123.243.224.198	A+PTR	123-243-224-198.static.tpgi.com.au
123.243.224.216	A+PTR	123-243-224-216.static.tpgi.com.au
123.243.224.220	A+PTR	123-243-224-220.static.tpgi.com.au
123.243.224.241	A+PTR	123-243-224-241.static.tpgi.com.au
123.243.225.16	A+PTR	123-243-225-16.static.tpgi.com.au
123.243.225.24	A+PTR	123-243-225-24.static.tpgi.com.au
123.243.225.70	A+PTR	123-243-225-70.static.tpgi.com.au
123.243.225.100	A+PTR	123-243-225-100.static.tpgi.com.au
123.243.225.110	A+PTR	123-243-225-110.static.tpgi.com.au
123.243.225.119	A+PTR	123-243-225-119.static.tpgi.com.au
123.243.225.133	A+PTR	123-243-225-133.static.tpgi.com.au
123.243.225.137	A+PTR	123-243-225-137.static.tpgi.com.au
123.243.225.143	A	123-243-225-143.static.tpgi.com.au
123.243.225.168	A+PTR	123-243-225-168.static.tpgi.com.au
123.243.225.177	A+PTR	123-243-225-177.static.tpgi.com.au
123.243.225.184	A	mrbasicprojects.com
123.243.225.193	A+PTR	123-243-225-193.static.tpgi.com.au
123.243.225.196	A	123-243-225-196.static.tpgi.com.au
123.243.225.197	A+PTR	123-243-225-197.static.tpgi.com.au
123.243.225.201	A+PTR	123-243-225-201.static.tpgi.com.au
123.243.225.249	A+PTR	123-243-225-249.static.tpgi.com.au
123.243.226.17	A+PTR	123-243-226-17.static.tpgi.com.au
123.243.226.25	A+PTR	123-243-226-25.static.tpgi.com.au
123.243.226.59	A+PTR	123-243-226-59.static.tpgi.com.au
123.243.226.62	PTR	123-243-226-62.static.tpgi.com.au
123.243.226.62	A	mail.smileyshouse.net
123.243.226.62	A	123-243-226-62.tpgi.com.au
123.243.226.86	A+PTR	123-243-226-86.static.tpgi.com.au
123.243.226.114	A	123-243-226-114.static.tpgi.com.au
123.243.226.125	A+PTR	123-243-226-125.static.tpgi.com.au
123.243.226.144	A	123-243-226-144.tpgi.com.au
123.243.226.164	A+PTR	123-243-226-164.static.tpgi.com.au
123.243.226.173	A+PTR	123-243-226-173.static.tpgi.com.au
123.243.226.174	A+PTR	123-243-226-174.static.tpgi.com.au
123.243.226.202	PTR	sbs.spinoutsoftware.com.au
123.243.226.214	A+PTR	123-243-226-214.static.tpgi.com.au
123.243.226.216	A+PTR	123-243-226-216.static.tpgi.com.au
123.243.227.15	A+PTR	123-243-227-15.static.tpgi.com.au
123.243.227.84	A+PTR	123-243-227-84.static.tpgi.com.au
123.243.227.89	A+PTR	123-243-227-89.static.tpgi.com.au
123.243.227.107	A+PTR	123-243-227-107.static.tpgi.com.au
123.243.227.133	A+PTR	123-243-227-133.static.tpgi.com.au
123.243.227.159	A+PTR	123-243-227-159.static.tpgi.com.au
123.243.227.179	A+PTR	123-243-227-179.static.tpgi.com.au
123.243.227.208	A+PTR	123-243-227-208.static.tpgi.com.au
123.243.227.210	A	123-243-227-210.static.tpgi.com.au