Robtex

Up: 209.240.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 209.240.0.0/23
Down right: 209.240.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.240.0.1	A	dns.1st.net
209.240.0.2	PTR	dns2.1st.net
209.240.0.3	PTR	ns2.ridgefieldgroup.com
209.240.0.5	PTR	1st.net
209.240.0.6	PTR	speed1.net
209.240.0.10	A	platinum.1st.net
209.240.0.11	A+PTR	vm11.qwikhost.com
209.240.0.11	A	rpc1.qwikhost.com
209.240.0.12	A	rpc2.qwikhost.com
209.240.0.13	PTR	vm13.qwikhost.com
209.240.0.13	A	rpc3.qwikhost.com
209.240.0.14	A	memberstest.1st.net
209.240.0.20	A+PTR	ns3.1st.net
209.240.0.22	A	phone.1st.net
209.240.0.23	A	statistics.1st.net
209.240.0.24	A	noc.qwikhost.com
209.240.0.26	PTR	whmcs.ridgefieldgroup.com
209.240.0.27	A+PTR	vhosting1.1st.net
209.240.0.28	PTR	www.speed1.net
209.240.0.29	A	hog.1st.net
209.240.0.30	A	dradius.1st.net
209.240.0.31	A	radius2.1st.net
209.240.0.33	A	virtual1.qwikhost.com
209.240.0.37	A	oldvirtual2.qwikhost.com
209.240.0.38	A+PTR	sa.qwikhost.com
209.240.0.38	A	speedweb.1st.net
209.240.0.39	A	firstweb.1st.net
209.240.0.40	A	intranetweb.1st.net
209.240.0.41	A	shockwave.1st.net
209.240.0.44	A	ikanoradacct.1st.net
209.240.0.48	A+PTR	xerox.1st.net
209.240.0.49	A	vpn.qwikhost.com
209.240.0.50	A	stc-101.1st.net
209.240.0.51	A	stc-102.1st.net
209.240.0.52	A	stc-103.1st.net
209.240.0.53	A	phone1.1st.net
209.240.0.54	A+PTR	phone2.1st.net
209.240.0.55	A	etrn.1st.net
209.240.0.56	A	uh1.qwikhost.com
209.240.0.57	A	virtual3.qwikhost.com
209.240.0.60	A	radius1.1st.net
209.240.0.61	A	operations.qwikhost.com
209.240.0.80	PTR	billing2.1st.net
209.240.0.81	A+PTR	office1.1st.net
209.240.0.86	A	management.laptop.bm.ridgefieldgroup.com
209.240.0.88	A	unix.1st.net
209.240.0.99	A	w4w.1st.net
209.240.0.100	A	wp.1st.net
209.240.0.103	A	ps.1st.net
209.240.0.106	A+PTR	powerswitch2.1st.net
209.240.0.107	A	powerswitch3.1st.net
209.240.0.110	A+PTR	ftp.1st.net
209.240.0.115	A	network5.1st.net
209.240.0.150	A	netops.1st.net
209.240.0.152	A	silcon1.1st.net
209.240.0.154	A	radacct1.1st.net
209.240.0.158	A+PTR	redhat.qwikhost.com
209.240.0.159	A	gold.1st.net
209.240.0.160	A	radius3.1st.net
209.240.0.171	A	register.qwikhost.com
209.240.0.236	A	jukebox.1st.net
209.240.0.241	A	temp.1st.net
209.240.0.245	A	smsmanage.1st.net
209.240.0.249	A	sw249.qwikhost.com
209.240.0.250	A	serverswitch.1st.net
209.240.0.252	A	bm3500.qwikhost.com
209.240.0.252	A	ofc.1st.net
209.240.0.253	A	sw253.qwikhost.com
209.240.0.254	A	cmh.qwikhost.com
209.240.1.0	PTR	network.oglebay.w.colo.qwikhost.com
209.240.1.2	A	www.oglebay-resort.com
209.240.1.4	A	wheeling-park.com
209.240.1.6	PTR	unused-6.oglebay.w.colo.qwikhost.com
209.240.1.6	A	oglebay-resort.com
209.240.1.7	A	revenueschool.org
209.240.1.8	PTR	unused-8.oglebay.w.colo.qwikhost.com
209.240.1.8	A	oglebaypark.org
209.240.1.8	A	wilson-lodge.net
209.240.1.10	PTR	listserver.oglebay-resort.com
209.240.1.14	PTR	nigminstitute.com
209.240.1.18	A+PTR	listserver.oglebay-resort.com
209.240.1.22	A+PTR	nigminstitute.com
209.240.2.1	PTR	1.2.240.209.hosting.nv6.qwikhost.com
209.240.2.1	A	bakerandsons.com
209.240.2.5	A	bhbglaw.com
209.240.2.8	A	a-209-240-2-8.63rdpvi.com
209.240.2.10	A	www.stclairsville.com
209.240.2.11	A	mchs.k12.oh.us
209.240.2.11	A	www.mchs.k12.oh.us
209.240.2.13	PTR	www.cardinalwss.com
209.240.2.13	A	cardinalwss.com
209.240.2.13	A	mail.cardinalwss.com
209.240.2.14	A	austensurveying.com
209.240.2.15	PTR	nacbt.org
209.240.2.15	A	www.nacbt.org
209.240.2.16	A+PTR	ravenrocks.org
209.240.2.18	A+PTR	18.2.240.209.hosting.nv6.qwikhost.com
209.240.2.19	PTR	www.jacksongas.com
209.240.2.20	A	www.equitablesavings.com
209.240.2.20	A	mail.equitablesavings.com
209.240.2.21	PTR	www.darkhorsenetworks.com
209.240.2.22	A	mail.sayrerealestate.com
209.240.2.23	PTR	mail.more2liferadio.com
209.240.2.23	A	more2liferadio.com
209.240.2.24	A	moretoliferadio.com
209.240.2.25	PTR	www.mfofficesupply.com
209.240.2.26	A+PTR	theipa.com
209.240.2.26	A	mail.theipa.com
209.240.2.32	A+PTR	smartcenter.org
209.240.2.32	A	mail.smartcenter.org
209.240.2.36	A+PTR	36.2.240.209.hosting.nv6.qwikhost.com
209.240.2.39	A+PTR	39.2.240.209.hosting.nv6.qwikhost.com
209.240.2.40	PTR	mail.supermailinc.com
209.240.2.43	A+PTR	43.2.240.209.hosting.nv6.qwikhost.com
209.240.2.46	A+PTR	46.2.240.209.hosting.nv6.qwikhost.com
209.240.2.48	A+PTR	48.2.240.209.hosting.nv6.qwikhost.com
209.240.2.57	A+PTR	57.2.240.209.hosting.nv6.qwikhost.com
209.240.2.60	A+PTR	60.2.240.209.hosting.nv6.qwikhost.com
209.240.2.228	PTR	unbound.hosting.qwikhost.com
209.240.2.247	A	webserver.qwikhost.com
209.240.2.248	A	backup2.qwikhost.com
209.240.2.252	A	backup.qwikhost.com
209.240.2.253	A	virtual6.qwikhost.com
209.240.3.222	PTR	222.3.240.209.hosting.qwikhost.com