Robtex

Up: 203.89.24.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.89.25.0/25
Down right: 203.89.25.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.89.25.6	A+PTR	corp-mx.datautama.net.id
203.89.25.6	PTR	ns2.jkt.datautama.net.id
203.89.25.6	A	mailx.55dinamika.com
203.89.25.10	PTR	ip-25-10.datautama.net.id
203.89.25.10	A	hmministry.biz
203.89.25.10	A	healingmail.net
203.89.25.28	A	mail.budiluhur.net
203.89.25.34	PTR	ip-25-34.datautama.net.id
203.89.25.34	A	jabberku.com
203.89.25.63	PTR	ip-25-63.datautama.net.id
203.89.25.64	PTR	ip-25-64.datautama.net.id
203.89.25.72	PTR	ip-25-72.datautama.net.id
203.89.25.83	PTR	ip-25-83.datautama.net.id
203.89.25.83	A	mail1.softexindonesia.com
203.89.25.83	A	mail2.confidence-adultcare.com
203.89.25.120	PTR	ip-25-120.datautama.net.id
203.89.25.127	PTR	ip-25-127.datautama.net.id
203.89.25.128	PTR	ip-25-128.datautama.net.id
203.89.25.146	PTR	ip-25-146.datautama.net.id
203.89.25.149	PTR	ip-25-149.datautama.net.id
203.89.25.151	PTR	ip-25-151.datautama.net.id
203.89.25.166	A	rotaryana.net
203.89.25.170	PTR	mail.incubatechnology.com
203.89.25.176	PTR	ip-25-176.datautama.net.id
203.89.25.184	PTR	ip-25-184.datautama.net.id
203.89.25.190	A+PTR	mail1.indocare.com
203.89.25.194	PTR	ip-25-194.datautama.net.id
203.89.25.194	A	mail.mcs-jkt.com
203.89.25.194	A	mail.pbaglobal.com
203.89.25.208	PTR	ip-25-208.datautama.net.id
203.89.25.212	PTR	ip-25-212.datautama.net.id
203.89.25.212	A	www.docotrans.com
203.89.25.212	A	www.docotrack.com
203.89.25.248	PTR	ip-25-248.datautama.net.id
203.89.25.250	PTR	ip-25-250.datautama.net.id