Robtex

Up: 203.128.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.128.72.0/25
Down right: 203.128.72.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.128.72.2	PTR	ip-72-2.neuviz.net.id
203.128.72.18	PTR	smtp.ptcitraair.co.id
203.128.72.59	PTR	ip-59-72-128-203.neuviz.net.id
203.128.72.64	PTR	ip-64-72-128-203.neuviz.net.id
203.128.72.65	A	ftp.fluidcon.co.id
203.128.72.70	A+PTR	www.roadblocker.co.id
203.128.72.70	A	www.fluidcon.co.id
203.128.72.74	A+PTR	mail.fluidcon.co.id
203.128.72.74	A	mx1.roadblocker.co.id
203.128.72.74	A	fjmx.filter-carts.com
203.128.72.83	PTR	mail.kojo.co.id
203.128.72.96	PTR	ip-72-96.neuviz.net.id
203.128.72.115	PTR	ip-72-115.neuviz.net.id
203.128.72.115	A	smtp1.rcti.tv
203.128.72.116	A+PTR	jktrelay.mitrais.com
203.128.72.118	PTR	ip-72.118.neuviz.net.id
203.128.72.118	A	dns1.mincom.co.id
203.128.72.118	A	mrorelay.mincom.co.id
203.128.72.128	PTR	ip-72-128.neuviz.net.id
203.128.72.146	PTR	ip-72-146.neuviz.net.id
203.128.72.149	PTR	mail1.intraco.co.id
203.128.72.150	PTR	mail.indomaret.co.id
203.128.72.151	PTR	mail.intraco.co.id
203.128.72.159	PTR	ip-72-159.neuviz.net.id
203.128.72.172	PTR	mail1.eniindonesia.co.id
203.128.72.208	PTR	ip-72-208.neuviz.net.id
203.128.72.212	PTR	vmail.telesindoshop.com
203.128.72.238	PTR	ip-72-238.neuviz.net.id
203.128.72.238	A	anabatictech.com
203.128.72.238	A	indonesia-mobilindo.co.id
203.128.72.251	PTR	ip-72-251.neuviz.net.id
203.128.72.251	A	my-tbig.com
203.128.72.253	PTR	mail.tower-bersama.co.id