Robtex

Up: 123.231.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 123.231.248.0/22
Down right: 123.231.252.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
123.231.248.149	A	pentavalent.co.id
123.231.248.149	A	mail.pentavalent.co.id
123.231.248.149	A	www.pentavalent.co.id
123.231.248.245	PTR	mail.yudha-group.co.id
123.231.249.35	PTR	idib.anz.co.id
123.231.249.149	PTR	mailexc.ptdh.co.id
123.231.249.149	A	jkt.darmahenwa.co.id
123.231.249.151	PTR	mailexc.ptdh.co.id
123.231.249.152	PTR	smtp.ptdh.co.id
123.231.250.117	A	agricware.com
123.231.250.130	PTR	bsp.co.id
123.231.250.131	PTR	bsp.co.id
123.231.250.133	PTR	bsp.co.id
123.231.250.134	PTR	bsp.co.id
123.231.250.135	A	blogs.beoku.com
123.231.250.140	A	beoku.com
123.231.250.179	A	mail.pinagoutama.com
123.231.250.194	A	mail.siroma.net
123.231.250.194	A	siroma.net
123.231.250.194	A	server1.siroma.net
123.231.251.4	PTR	ptkss.co.id
123.231.251.5	PTR	mail.ptkss.co.id
123.231.251.30	A	oiaccess.com
123.231.251.75	A	mail.rdpomss.com
123.231.251.78	A+PTR	mail.rifansi.net
123.231.251.78	A	db.rifansi.net
123.231.252.4	A+PTR	kspintidana.com
123.231.252.4	A	ns2.kspintidana.com
123.231.252.4	A	ns1.kspintidana.com
123.231.252.10	A	kspintidana.com
123.231.252.10	A	www.kspintidana.com
123.231.252.24	PTR	mail.pusair-pu.go.id
123.231.252.34	A	atisisbada.net
123.231.252.40	A+PTR	speedtest-bdg.idola.net.id
123.231.252.98	A	eid-acceptance.com
123.231.252.98	A	www.eid-acceptance.com
123.231.252.100	A	eidxl-edocumentation.com
123.231.252.151	PTR	mail.pt-smi.co.id
123.231.252.235	A	mail.astra-daido.co.id
123.231.252.247	A	cbt.smansumsel.sch.id
123.231.253.90	A	www.starlink-solusi.net
123.231.253.115	A	simpeldoku.com
123.231.253.219	A	kota-binjai.kpu.go.id
123.231.253.230	A	atisisbada.id
123.231.253.230	A	www.pilar.web.id
123.231.253.230	A	pilar.web.id
123.231.254.135	A	mail.rental-ipabx.com
123.231.255.107	A	jets.bankjatim.co.id
123.231.255.130	A	mail.bangkapos.com
123.231.255.132	A	cetak.bangkapos.com
123.231.255.132	A	images.bangkapos.com
123.231.255.133	A	www.posbelitung.com