Robtex

Up: 208.76.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 208.76.152.0/23
Down right: 208.76.154.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.76.152.1	A+PTR	dnsresolver-a.as11404.net
208.76.152.1	A	dnsresolver-a.spectrumnet.us
208.76.152.1	A	dns01.spectrumnet.us
208.76.152.2	PTR	ns1.wavedns.net
208.76.152.2	A	ns1.rk.wavecable.com
208.76.152.3	PTR	ns1.vanoppen.com
208.76.152.4	A+PTR	ns1.bartlowtech.com
208.76.152.5	PTR	ns1.360comm.net
208.76.152.6	A	ns1.wideideas.net
208.76.152.7	PTR	ns1.acceleratedinternet.net
208.76.152.7	A	ns1.rk.wavecable.com
208.76.152.7	A	auth-dns3.saw.net
208.76.152.9	A+PTR	dnsresolver-b.as11404.net
208.76.152.9	A	engliegend.com
208.76.152.9	A	dnsresolver-b.spectrumnet.us
208.76.152.10	PTR	ns2.wavedns.net
208.76.152.11	PTR	ns2.vanoppen.com
208.76.152.12	A+PTR	ns2.bartlowtech.com
208.76.152.13	PTR	ns2.wavedns.net
208.76.152.14	A	ns2.wideideas.net
208.76.152.15	A+PTR	auth2.wavedns.net
208.76.152.15	A	ns2.acceleratedinternet.net
208.76.152.18	A+PTR	dns1a-sea.spectrumnet.us
208.76.152.18	A	dns1-sea.spectrumnet.us
208.76.152.22	A	dns1b-sea.spectrumnet.us
208.76.152.22	A	dns1-b-sea.spectrumnet.us
208.76.152.26	A+PTR	dns1a-ww.spectrumnet.us
208.76.152.26	A	dns1-ww.spectrumnet.us
208.76.152.34	A	asterisk01-sea.spectrumnet.us
208.76.152.35	A	asterisk02-sea.spectrumnet.us
208.76.152.66	PTR	mail01-sea.spectrumnet.us
208.76.152.66	A	mail-in.spectrumnet.us
208.76.152.66	A	webmail.spectrumnet.us
208.76.152.67	PTR	mail01-sea-out.spectrumnet.us
208.76.152.68	A+PTR	mailfilter01-sea.spectrumnet.us
208.76.152.68	A	mail02-sea.spectrumnet.us
208.76.152.68	A	mail-in1-sea.spectrumnet.us
208.76.152.70	PTR	mailfilter01-sea.spectrumnet.us
208.76.152.72	A	stream-high.kmih.org
208.76.152.72	A	kmih-stream-high.spectrumnet.us
208.76.152.73	A+PTR	stream-low.kmih.org
208.76.152.73	A	kmih-stream-low.spectrumnet.us
208.76.152.75	PTR	knhc-stream-low.spectrumnet.us
208.76.152.85	PTR	engbr1-sea-v50.oob.spectrumnet.us
208.76.152.85	A	mrtg.spectrumnet.us
208.76.152.85	A	noc.spectrumnet.us
208.76.152.86	A+PTR	noc-sea.as11404.net
208.76.152.86	A	nms.spectrumnet.us
208.76.152.89	A+PTR	graphs.spectrumnet.us
208.76.152.91	A	voipgui.spectrumnet.us
208.76.152.92	A	jabber.spectrumnet.us
208.76.152.92	A	sla.spectrumnet.us
208.76.152.98	A	vps01-sea.spectrumnet.us
208.76.152.99	A+PTR	webmail1-sea.spectrumnet.us
208.76.152.102	A	web01.vanoppen.com
208.76.152.103	A	vps-wstn.kmih.org
208.76.152.105	PTR	vps1-sea.chernyak.com
208.76.152.106	PTR	vps-wstn.bartlowtech.com
208.76.152.106	A	craigwende.com
208.76.152.106	A	rickbartlow.com
208.76.152.107	PTR	mysql1-sea.vanoppen.com
208.76.152.109	A+PTR	pub-web.spectrumnet.us
208.76.152.109	A	farestart-vps.spectrumnet.us
208.76.152.138	PTR	m0n0wall-sea-wan.office.spectrumnet.us
208.76.152.146	A	vps1-sea-a.spectrumnet.us
208.76.152.154	A	vps2-sea-a.spectrumnet.us
208.76.152.158	A	vz-clust2-1-a.wideideas.net
208.76.152.178	PTR	xenserver1-sea-admin.spectrumnet.us
208.76.152.210	A+PTR	ookla-sea.spectrumnet.us
208.76.152.230	A	guydickinson.spectrumnet.us
208.76.152.230	A	simply-spaces.com
208.76.152.230	A	gdickinson.co.uk
208.76.152.242	PTR	ad1-sea.office.spectrumnet.us
208.76.153.1	PTR	cr2-ww-g4-1.bb.spectrumnet.us
208.76.153.1	A	br1-olytss.bb.spectrumnet.us
208.76.153.114	PTR	br1-sea-loop0.bb.spectrumnet.us
208.76.153.149	PTR	cr1-1kd-t4-3-953.bb.spectrumnet.us
208.76.153.157	PTR	agg2-sea-g1-2-109.bb.spectrumnet.us
208.76.154.98	A	file01.applieddatasolutions.com
208.76.154.106	PTR	backup.backuptask.com
208.76.154.107	A	backup-cluster.applieddatasolutions.com
208.76.154.108	A+PTR	www.adsbackup.com
208.76.154.108	A	applieddatasolutions.com
208.76.154.110	A	front-end.applieddatasolutions.com
208.76.154.146	A+PTR	server.gigascanner.com
208.76.154.146	A	gigascanner.com
208.76.154.146	A	electricbassworld.com
208.76.154.194	A+PTR	mail-ww.vanoppen.com
208.76.155.6	A+PTR	ns-west.vanoppen.com
208.76.155.6	A	ns1.vanoppen.com
208.76.155.10	PTR	web1-jvo.vanoppen.com
208.76.155.10	A	vanoppen.biz
208.76.155.10	A	www.vanoppen.biz
208.76.155.11	A	criticalpower.us
208.76.155.91	PTR	got-name.com
208.76.155.235	PTR	db1.sellvoip.net
208.76.155.236	PTR	http-1.sellvoip.net
208.76.155.236	PTR	www.sellvoip.net