Robtex

Up: 66.203.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.203.120.0/23
Down right: 66.203.122.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.203.120.11	A	pc2-l3-6509-1.realone.com
66.203.120.12	A	pc2-gp2-6509-1.realone.com
66.203.120.13	A	pc2-yc-6509-2.realone.com
66.203.120.14	A	pc2-l3-0101-2.realone.com
66.203.120.18	A	pc2-eli-0101.realone.com
66.203.120.31	A	pc2-yc-0101.realone.com
66.203.120.32	A	pc2-l3-0101.realone.com
66.203.120.36	A	pc2-l3-0201-p.realone.com
66.203.120.37	A	pc2-l3-0201-b.realone.com
66.203.120.38	A	pc2-yc-0201.realone.com
66.203.120.40	A+PTR	pc1-eli-0101.realone.com
66.203.120.41	A	pc1-l3-6509-1.realone.com
66.203.120.42	A+PTR	pc1-l3-0101.realone.com
66.203.120.43	A	pc1-l3-0201-b.realone.com
66.203.120.44	A	pc1-l3-0201-p.realone.com
66.203.120.45	A	pc1-yc-6509-2.realone.com
66.203.120.46	A+PTR	pc1-yc-0101.realone.com
66.203.120.47	A	pc1-yc-0201.realone.com
66.203.120.48	A+PTR	pc1-l3-0101-2.realone.com
66.203.120.48	A	pc1-gp1-6509-2.realone.com
66.203.120.49	A	pc1-gp2-6509-1.realone.com
66.203.120.253	A	mail.n.music.realnetworks.com
66.203.121.254	A	dns02.rbn.com
66.203.122.5	A	home.real.com
66.203.122.7	A	software-dl.real.com
66.203.122.7	A	rhapsody.listen.com
66.203.122.7	A	seattle-dl.real.com
66.203.122.8	A	images.realnetworks.com
66.203.122.8	A	imagesrr1.real.com
66.203.122.8	A	tb.real.com
66.203.122.12	A	unifi-netscaler-de.real.com
66.203.122.13	A+PTR	ves-ftp.real.com
66.203.122.14	A+PTR	switchboardrr1.real.com
66.203.122.14	A	www.prognet.com
66.203.122.15	PTR	owis-gmp-sea.real.com
66.203.122.16	A	osas1-gmp-sea.real.com
66.203.122.18	A	omgt-gmp-sea.real.com
66.203.122.19	A	osis-gmp-sea.real.com
66.203.122.20	A	ocus-gmp-sea.real.com
66.203.122.21	A+PTR	ocas-gmp-sea.real.com
66.203.122.25	A+PTR	vps-vip.real.com
66.203.122.26	A+PTR	sms-vip.real.com
66.203.122.27	A	divulgeapp.com
66.203.122.27	A	ups-vip.real.com
66.203.122.28	A+PTR	sps-vip.real.com
66.203.122.29	A	scs-vip.real.com
66.203.122.30	A+PTR	rct-vip.real.com
66.203.122.31	A+PTR	cstool-d2c.real.com
66.203.122.32	A	cstool-java-d2c.real.com
66.203.122.33	A	r1auth-d2c.real.com
66.203.122.34	A	myaccount-java-d2c.real.com
66.203.122.35	A	myaccount.real.com
66.203.122.37	A+PTR	realcom-sister.real.com
66.203.122.37	A	www.real.com
66.203.122.37	A	asia.real.com
66.203.122.38	PTR	update.real.com
66.203.122.39	PTR	service.real.com
66.203.122.40	A	ctsmail-d2c.real.com
66.203.122.41	A+PTR	account.real.com
66.203.122.42	A+PTR	invu-web.real.com
66.203.122.43	A+PTR	invu-api.real.com
66.203.122.45	A	invu-tools.real.com
66.203.122.46	A	invu-map-tools.real.com
66.203.122.47	A	invu-report.real.com
66.203.122.48	A	invu-app.real.com
66.203.122.49	A	invu-webdemo.real.com
66.203.122.50	A+PTR	vzwrbt-dr.real.com
66.203.122.51	A	ins.rbn.com
66.203.122.52	A+PTR	nix.real.com
66.203.122.52	A	realfoundation.org
66.203.122.52	A	seeinvu.net
66.203.122.58	A+PTR	www-web.real.com
66.203.122.58	A	tryrealplayercloud.us
66.203.122.58	A	tryrealplayercloud.net
66.203.122.59	PTR	www.invu.tv
66.203.122.60	PTR	realnetworks.com
66.203.122.64	A+PTR	forms.real.com
66.203.122.64	A	scopes.real.com
66.203.122.64	A	proforma.real.com
66.203.122.65	PTR	corpmail.real.com
66.203.122.68	A+PTR	docs.real.com
66.203.122.70	A	firstrun.real.com
66.203.123.14	A	dl-lvs04.real.com
66.203.123.16	A	img-lvs03.real.com
66.203.123.17	A	dl-lvs01.real.com
66.203.123.18	A	dl-lvs02.real.com
66.203.123.19	A	dl-lvs03.real.com
66.203.123.20	A	img-lvs02.real.com
66.203.123.23	PTR	tb.real.com
66.203.123.25	PTR	home.real.com
66.203.123.25	A	realone.real.com
66.203.123.25	A	sports.real.com
66.203.123.115	A	games-dl15.real.com
66.203.123.116	A	games-dl16.real.com
66.203.123.117	A	games-dl17.real.com
66.203.123.118	A	games-dl18.real.com
66.203.123.150	A+PTR	software-dl01.real.com
66.203.123.151	A	software-dl02.real.com
66.203.123.152	A	software-dl03.real.com
66.203.123.153	A+PTR	software-dl04.real.com
66.203.123.154	A	software-dl05.real.com
66.203.123.155	A+PTR	software-dl06.real.com
66.203.123.156	A	software-dl07.real.com
66.203.123.157	A	software-dl08.real.com
66.203.123.158	A	software-dl09.real.com
66.203.123.159	A	software-dl10.real.com
66.203.123.160	A+PTR	software-dl11.real.com
66.203.123.161	A+PTR	software-dl12.real.com
66.203.123.171	A	image-web02.real.com
66.203.123.172	A+PTR	image-web03.real.com
66.203.123.173	A	image-web04.real.com
66.203.123.174	A	image-web05.real.com
66.203.123.175	A+PTR	image-web06.real.com
66.203.123.176	A	image-web07.real.com
66.203.123.177	A	image-web08.real.com
66.203.123.189	A	image-web12.real.com
66.203.123.190	A	image-web13.real.com
66.203.123.191	A	image-web14.real.com
66.203.123.192	A	image-web15.real.com
66.203.123.193	A	image-web16.real.com
66.203.123.194	A+PTR	image-web17.real.com
66.203.123.195	A	image-web18.real.com
66.203.123.196	A	image-web19.real.com