Robtex

Up: 27.131.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 27.131.0.0/25
Down right: 27.131.0.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.131.0.5	PTR	5.0.131.27.sbp.net.id
27.131.0.5	A	smkn1serang.sch.id
27.131.0.7	PTR	7.0.131.27.sbp.net.id
27.131.0.54	PTR	54.0.131.27.sbp.net.id
27.131.0.60	PTR	60.0.131.27.sbp.net.id
27.131.0.66	PTR	66.0.131.27.sbp.net.id
27.131.0.74	PTR	74.0.131.27.sbp.net.id
27.131.0.74	A	kantorku.us
27.131.0.74	A	www.indokabel.co.id
27.131.0.82	PTR	ns12.sbp.net.id
27.131.0.115	PTR	115.0.131.27.sbp.net.id
27.131.0.115	A	ns1.antautama.co.id
27.131.0.130	A+PTR	mail.sbp.net.id
27.131.0.132	A	outgoing2.sbp.net.id
27.131.0.133	PTR	133.0.131.27.sbp.net.id
27.131.0.133	A	ns12.sbp.net.id
27.131.0.134	PTR	smtp.sbp.net.id
27.131.0.136	A	outgoing1.sbp.net.id
27.131.0.138	PTR	138.0.131.27.sbp.net.id
27.131.0.138	A	domain.sbp.net.id
27.131.0.138	A	antaramas.com
27.131.0.141	PTR	141.0.131.27.sbp.net.id
27.131.0.142	A+PTR	filter3.sbp.net.id
27.131.0.144	PTR	144.0.131.27.sbp.net.id
27.131.0.144	A	antispam.sbp.net.id
27.131.0.144	A	mail.tigersonphilti.com
27.131.0.145	PTR	145.0.131.27.sbp.net.id
27.131.0.145	A	mail2.sbp.net.id
27.131.0.145	A	dc-a370b2bf.farinside.com
27.131.0.147	PTR	outgoing.sbp.net.id
27.131.0.150	A	radlog.sbp.net.id
27.131.0.152	PTR	152.0.131.27.sbp.net.id
27.131.0.171	A+PTR	smtp.sbp.net.id
27.131.0.175	PTR	175.0.131.27.sbp.net.id
27.131.0.175	A	millendax.com
27.131.0.175	A	mail.millendax.com
27.131.0.178	A	aryapujaka.com
27.131.0.179	PTR	179.0.131.27.sbp.net.id
27.131.0.179	A	ns4.sbp.net.id
27.131.0.180	A+PTR	ns5.sbp.net.id
27.131.0.183	PTR	183.0.131.27.sbp.net.id
27.131.0.183	A	sbp.net.id
27.131.0.189	A	mercure-bengkulu.com
27.131.0.199	PTR	sbp.net.id
27.131.0.199	A	customer.sbp.net.id
27.131.0.227	PTR	227.0.131.27.sbp.net.id
27.131.0.227	A	hangtuahfm.com
27.131.0.227	A	bgp.co.id
27.131.0.229	PTR	229.0.131.27.sbp.net.id
27.131.0.254	PTR	ns3.sbp.net.id