Robtex

Up: 150.100.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 150.100.0.0/17
Down right: 150.100.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
150.100.1.5	A	tokyo1-dc-rm-ge-5-3-0-146.sinet.ad.jp
150.100.1.6	A	sinet.jp
150.100.1.26	A	nws-sys1.sinet.ad.jp
150.100.1.60	A	ws-1-60.sinet.ad.jp
150.100.2.1	PTR	chiba-rm-xe-4-0-5-107.s5.sinet.ad.jp
150.100.2.2	A	259200.ns.cs.it-chiba.ac.jp
150.100.2.2	A	sigw.nagahama-i-bio.ac.jp
150.100.2.2	A	sigw.sinet.jp
150.100.2.3	PTR	dnssec02.sinet.ad.jp
150.100.2.4	A	chiba-dc-rmcm400.sinet.ad.jp
150.100.3.6	A+PTR	dns.sinet.ad.jp
150.100.3.7	A+PTR	mailserver.sinet.ad.jp
150.100.5.2	A	chiba-swift.sinet.ad.jp
150.100.6.8	A+PTR	f.dns.jp
150.100.6.11	A+PTR	ns-jp6.sinet.ad.jp
150.100.6.12	A	nsf.dns.jp
150.100.7.2	PTR	ping-response-hakata.sinet.ad.jp
150.100.8.12	A	www.sinet.ad.jp
150.100.8.18	A+PTR	www.sinet.ad.jp
150.100.8.18	A+PTR	www1.sinet.ad.jp
150.100.8.18	A	sinet.ad.jp
150.100.9.16	A	ddos1.sinet.ad.jp
150.100.12.2	A	dlyprob-ctl.sinet.ad.jp
150.100.12.3	A	dlyprob-gra.sinet.ad.jp
150.100.12.4	A+PTR	jira.sinet.ad.jp
150.100.12.25	A	vpn-gri2.sinet.ad.jp
150.100.13.3	PTR	speed-sapporo.sinet.ad.jp
150.100.13.30	PTR	sapporo-dc-seg1.sinet.ad.jp
150.100.13.66	A	dlyprob-tsukuba-dc.sinet.ad.jp
150.100.13.132	A	csc-tokyo1-dc.sinet.ad.jp
150.100.13.134	A	10gcap1-tokyo1-dc.sinet.ad.jp
150.100.13.136	A	smartprobe-tokyo1-dc.sinet.ad.jp
150.100.14.2	A	dlyprob-kyoto-dc.sinet.ad.jp
150.100.14.3	PTR	radius-2.sinet.ad.jp
150.100.15.2	PTR	gri-asa.sinet.ad.jp
150.100.15.8	A	gri-tra0.sinet.ad.jp
150.100.15.9	A	gri-tra1.sinet.ad.jp
150.100.15.10	A	gri-cgi0.sinet.ad.jp
150.100.15.12	A	gri-gra0.sinet.ad.jp
150.100.16.108	A	r1.sn-xgmnpoxuopp-ioqe.googlevideo.com
150.100.16.108	A	r1.sn-xgmnpoxuopp-ioqe.c.pack.google.com
150.100.16.108	A	r1---sn-xgmnpoxuopp-ioqe.c.pack.google.com
150.100.16.109	A	r2.sn-xgmnpoxuopp-ioqe.googlevideo.com
150.100.18.2	A+PTR	dns-x.sinet.ad.jp
150.100.18.2	A+PTR	dns-x1.sinet.ad.jp
150.100.18.2	A	seijoh-u.ac.jp
150.100.18.6	A+PTR	dns-x.sinet.ad.jp
150.100.18.6	PTR	dns-x2.sinet.ad.jp
150.100.18.6	A	seijoh-u.ac.jp
150.100.18.10	A+PTR	dns-x.sinet.ad.jp
150.100.18.10	PTR	dns-x3.sinet.ad.jp
150.100.18.10	A	seijoh-u.ac.jp
150.100.20.3	PTR	peopo2.sinet.ad.jp
150.100.50.1	A+PTR	openhouse.gw.sinet.ad.jp
150.100.120.2	A	ns6.takakura.com
150.100.120.2	A	ns7.takakura.com
150.100.120.30	A	silverberry.takakura.com
150.100.120.30	A	ns1.takakura.com
150.100.130.29	A	aspenriskmanagement.com
150.100.194.180	A	wifibbva.com
150.100.208.14	A	ds.gakunin.nii.ac.jp
150.100.208.14	A	ds1.gakunin.nii.ac.jp
150.100.208.78	A	ds.gakunin.nii.ac.jp
150.100.209.78	A	ds.gakunin.nii.ac.jp
150.100.209.78	A	ds3.gakunin.nii.ac.jp
150.100.248.18	A	nii-pdu11-1.sinet.ad.jp
150.100.250.7	A+PTR	jpnac.sinet.ad.jp
150.100.250.12	A+PTR	nws-csc.sinet.ad.jp