Robtex

Up: 123.243.192.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.196.0/23
Down right: 123.243.198.0/23

IP	Type	Hostname
123.243.196.37	A	itmaster.com.au
123.243.196.94	A	123-243-196-94.static.tpgi.com.au
123.243.196.126	A	123-243-196-126.static.tpgi.com.au
123.243.196.134	PTR	123-243-196-134.static.tpgi.com.au
123.243.197.4	A+PTR	123-243-197-4.static.tpgi.com.au
123.243.197.10	A+PTR	123-243-197-10.static.tpgi.com.au
123.243.197.17	A+PTR	123-243-197-17.static.tpgi.com.au
123.243.197.59	A+PTR	123-243-197-59.static.tpgi.com.au
123.243.197.71	A+PTR	123-243-197-71.static.tpgi.com.au
123.243.197.101	A+PTR	123-243-197-101.static.tpgi.com.au
123.243.197.102	A+PTR	123-243-197-102.static.tpgi.com.au
123.243.197.114	A+PTR	123-243-197-114.static.tpgi.com.au
123.243.197.123	A+PTR	123-243-197-123.static.tpgi.com.au
123.243.197.151	PTR	123-243-197-151.static.tpgi.com.au
123.243.197.168	A+PTR	123-243-197-168.static.tpgi.com.au
123.243.197.172	A+PTR	123-243-197-172.static.tpgi.com.au
123.243.197.190	A+PTR	123-243-197-190.static.tpgi.com.au
123.243.197.217	A+PTR	123-243-197-217.static.tpgi.com.au
123.243.197.220	A+PTR	123-243-197-220.static.tpgi.com.au
123.243.197.221	A+PTR	123-243-197-221.static.tpgi.com.au
123.243.197.232	A+PTR	123-243-197-232.static.tpgi.com.au
123.243.197.237	A+PTR	123-243-197-237.static.tpgi.com.au
123.243.197.253	PTR	123-243-197-253.static.tpgi.com.au
123.243.198.118	A	123-243-198-118.static.tpgi.com.au
123.243.198.185	A+PTR	123-243-198-185.static.tpgi.com.au
123.243.199.4	PTR	123-243-199-4.static.tpgi.com.au
123.243.199.4	A	gglawyer.com.au
123.243.199.51	A+PTR	123-243-199-51.static.tpgi.com.au
123.243.199.119	A	mail.chriscoombes.com