Robtex

Up: 123.243.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 123.243.68.0/23
Down right: 123.243.70.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.243.68.2	A	mail.widdupbarilla.com.au
123.243.68.2	A	mail.integrityfg.com.au
123.243.68.2	A	widdupbarilla.com.au
123.243.68.4	A+PTR	123-243-68-4.static.tpgi.com.au
123.243.68.6	A	123-243-68-6.tpgi.com.au
123.243.68.32	A+PTR	123-243-68-32.static.tpgi.com.au
123.243.68.61	A	123-243-68-61.tpgi.com.au
123.243.68.99	A+PTR	123-243-68-99.static.tpgi.com.au
123.243.68.126	A	123-243-68-126.static.tpgi.com.au
123.243.68.140	A+PTR	123-243-68-140.static.tpgi.com.au
123.243.68.146	A+PTR	123-243-68-146.static.tpgi.com.au
123.243.68.147	A+PTR	mail.placidus.net
123.243.68.147	A	milkyway.placidus.net
123.243.68.147	A	wildhare.com.au
123.243.68.157	A	mail2.masos.com.au
123.243.68.241	A+PTR	123-243-68-241.static.tpgi.com.au
123.243.69.6	A	123-243-69-6.tpgi.com.au
123.243.69.30	PTR	123-243-69-30.tpgi.com.au
123.243.69.30	A	marcopolofoods.com
123.243.69.30	A	mail.marcopolofoods.com
123.243.69.42	PTR	123-243-69-42.tpgi.com.au
123.243.69.42	A	mail.outlookonline.com.au
123.243.69.135	A+PTR	123-243-69-135.tpgi.com.au
123.243.69.142	A	123-243-69-142.tpgi.com.au
123.243.69.153	A	123-243-69-153.tpgi.com.au
123.243.69.196	A	123-243-69-196.tpgi.com.au
123.243.69.222	PTR	123-243-69-222.tpgi.com.au
123.243.69.235	A	123-243-69-235.tpgi.com.au
123.243.70.10	A+PTR	123-243-70-10.static.tpgi.com.au
123.243.70.22	A+PTR	123-243-70-22.static.tpgi.com.au
123.243.70.35	A+PTR	123-243-70-35.static.tpgi.com.au
123.243.70.39	A+PTR	123-243-70-39.static.tpgi.com.au
123.243.70.68	A+PTR	123-243-70-68.static.tpgi.com.au
123.243.70.79	A	123-243-70-79.static.tpgi.com.au
123.243.70.83	A	123-243-70-83.tpgi.com.au
123.243.70.86	A+PTR	123-243-70-86.static.tpgi.com.au
123.243.70.115	A+PTR	123-243-70-115.static.tpgi.com.au
123.243.70.128	A	123-243-70-128.static.tpgi.com.au
123.243.70.131	PTR	123-243-70-131.static.tpgi.com.au
123.243.70.134	A+PTR	123-243-70-134.static.tpgi.com.au
123.243.70.143	A+PTR	123-243-70-143.static.tpgi.com.au
123.243.70.144	PTR	123-243-70-144.static.tpgi.com.au
123.243.70.144	A	mail.drhoffman.com.au
123.243.70.144	A	drhoffman.com.au
123.243.70.157	A	123-243-70-157.tpgi.com.au
123.243.70.181	A	123-243-70-181.static.tpgi.com.au
123.243.70.197	PTR	123-243-70-197.static.tpgi.com.au
123.243.70.198	A+PTR	123-243-70-198.static.tpgi.com.au
123.243.70.208	A+PTR	123-243-70-208.static.tpgi.com.au
123.243.70.214	A+PTR	123-243-70-214.static.tpgi.com.au
123.243.70.226	A+PTR	123-243-70-226.static.tpgi.com.au
123.243.71.0	A+PTR	123-243-71-0.static.tpgi.com.au
123.243.71.132	A	chill8.net
123.243.71.132	A	www.chill8.net
123.243.71.148	A	123-243-71-148.tpgi.com.au
123.243.71.179	A	123-243-71-179.tpgi.com.au
123.243.71.199	PTR	123-243-71-199.static.tpgi.com.au
123.243.71.199	A	packone.com.au
123.243.71.221	A+PTR	123-243-71-221.static.tpgi.com.au
123.243.71.233	A	mail.southern-neurology.com.au