Robtex

Up: 123.243.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.120.0/23
Down right: 123.243.122.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.120.46	A	netwizer.com
123.243.120.46	A	123-243-120-46.static.tpgi.com.au
123.243.120.62	A	123-243-120-62.static.tpgi.com.au
123.243.120.73	A+PTR	123-243-120-73.static.tpgi.com.au
123.243.120.109	PTR	candl.com.au
123.243.121.46	A	mail.thongle.net
123.243.121.46	A	123-243-121-46.static.tpgi.com.au
123.243.121.70	PTR	123-243-121-70.static.tpgi.com.au
123.243.121.149	PTR	123-243-121-149.static.tpgi.com.au
123.243.121.149	A	mail.sunshinetax.com.au
123.243.121.149	A	sunshinetax.com.au
123.243.122.13	PTR	123-243-122-13.static.tpgi.com.au
123.243.122.52	PTR	123-243-122-52.static.tpgi.com.au
123.243.122.52	A	mail.sinexgroup.biz
123.243.122.52	A	australiapolymarble.com
123.243.122.80	A+PTR	123-243-122-80.static.tpgi.com.au
123.243.122.186	PTR	123-243-122-186.static.tpgi.com.au
123.243.122.194	A	harrison.estate
123.243.122.249	PTR	123-243-122-249.static.tpgi.com.au
123.243.122.249	A	mail.grs.net.au
123.243.123.106	PTR	123-243-123-106.static.tpgi.com.au
123.243.123.106	A	starwing.com.au
123.243.123.106	A	tradecraft.com.au
123.243.123.108	A	setacademy.com.au
123.243.123.126	PTR	autodiscover.asmcm.com
123.243.123.159	PTR	123-243-123-159.static.tpgi.com.au
123.243.123.159	A	mail.icom.net.au
123.243.123.170	PTR	123-243-123-170.static.tpgi.com.au
123.243.123.170	A	ozflame.com
123.243.123.185	A+PTR	kenidea.com
123.243.123.185	A	0.mx.smtp.kenidea.com
123.243.123.185	A	mail.kenidea.com