Robtex

Up: 123.243.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.52.0/23
Down right: 123.243.54.0/23

IP	Type	Hostname
123.243.52.32	PTR	123-243-52-32.tpgi.com.au
123.243.52.32	A	www.i-ek.com
123.243.52.32	A	i-ek.com
123.243.52.100	A	123-243-52-100.tpgi.com.au
123.243.52.112	A	123-243-52-112.tpgi.com.au
123.243.52.114	A	123-243-52-114.tpgi.com.au
123.243.52.233	PTR	123-243-52-233.tpgi.com.au
123.243.52.233	A	kotzman.com.au
123.243.53.37	A	mail.morrismargolis.com.au
123.243.53.73	PTR	123-243-53-73.static.tpgi.com.au
123.243.53.108	A	tomcorrigan.com.au
123.243.53.111	A+PTR	123-243-53-111.static.tpgi.com.au
123.243.53.121	PTR	123-243-53-121.static.tpgi.com.au
123.243.53.166	A	mail2.markbryce.com
123.243.53.176	A	tmail.splus.com.au
123.243.53.210	A	123-243-53-210.tpgi.com.au
123.243.53.233	A+PTR	123-243-53-233.static.tpgi.com.au
123.243.53.233	A	123-243-53-233.tpgi.com.au
123.243.53.240	A+PTR	123-243-53-240.static.tpgi.com.au
123.243.53.253	A	mail.pjcamm.com.au
123.243.54.50	PTR	123-243-54-50.tpgi.com.au
123.243.54.56	A	mail.inovlab.com
123.243.54.131	A	123-243-54-131.tpgi.com.au
123.243.54.179	PTR	123-243-54-179.tpgi.com.au
123.243.54.179	A	davinci.hfhgroup.com.au
123.243.54.185	PTR	123-243-54-185.tpgi.com.au
123.243.54.185	A	mail.fryit.com.au
123.243.54.185	A	mail3.heydons.com.au
123.243.54.210	A	bossanova808.net
123.243.55.7	A+PTR	123-243-55-7.static.tpgi.com.au
123.243.55.12	A	123-243-55-12.tpgi.com.au
123.243.55.142	A	mail.treehousechildcare.com.au
123.243.55.161	A	yottajoy.com