Robtex

Up: 72.13.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 72.13.32.0/20
Down right: 72.13.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.13.32.0	PTR	host0.mhp-fo.brn1.verisign.com
72.13.32.15	A	mdns.verisign.com
72.13.32.22	A	namestoreftp.verisign-grs.com
72.13.32.24	A	domainscope.com
72.13.32.25	A	ccrrp.verisign-grs.net
72.13.32.35	PTR	mx.www.tv
72.13.32.35	A	mx.enic.cc
72.13.32.35	A	tv2syd.tv
72.13.32.36	PTR	www.tv
72.13.32.37	PTR	www.enic.cc
72.13.32.65	A	support.verisigninc.com
72.13.32.66	PTR	metabase.moreover.com
72.13.32.68	A	pds.verisigninc.com
72.13.32.69	PTR	ct.moreover.com
72.13.32.69	A	portal.verisigninc.com
72.13.32.69	A	portal.verisign.com
72.13.32.98	A+PTR	hostdist-a.verisign-grs.net
72.13.32.99	A+PTR	hostdist-b.verisign-grs.net
72.13.32.103	A	dnssecsigningservice.verisign-grs.com
72.13.32.104	A	dnssecsigningservice-csr.verisign-grs.com
72.13.32.170	A+PTR	mx01.nic.name
72.13.32.171	A+PTR	mx02.nic.name
72.13.32.173	A+PTR	nameepp.verisign-grs.com
72.13.32.175	A	nameweb.verisign-grs.com
72.13.33.38	A	mmsmonitor.verisign.com
72.13.33.39	A	mms.verisign.com
72.13.33.45	A	ipconnect.verisign-grs.com
72.13.33.45	A	ipconnect.verisign.com
72.13.33.64	A+PTR	push2talk01-notify.verisign.com
72.13.33.75	PTR	host75.vcs2-fo.brn1.verisign.com
72.13.33.86	A	contentservices5.verisign.com
72.13.33.99	PTR	pmg2.verisign.com.verisign.com
72.13.33.205	A	int-pmg-smtp.verisign.com
72.13.36.1	PTR	rv.colo-fo.brn1.verisign.com
72.13.36.19	A	ftp.verisign-grs.com
72.13.36.27	A	mx1.verisign.se
72.13.36.28	A	mx2.verisign.se
72.13.36.29	A	mx3.verisign.se
72.13.36.32	A	ictran.verisign-grs.com
72.13.36.37	PTR	blogs.verisign.com
72.13.36.38	A	uat-ips-web.verisign-grs.com
72.13.36.39	A+PTR	uat-ips-web-dev.verisign-grs.com
72.13.36.39	A	dbmbp-hp1.verisign.com
72.13.36.64	PTR	domainscope.com
72.13.36.64	A	dbmbp10.verisign.com
72.13.36.64	A	www.domainscope.com
72.13.36.65	A	dbmbp11.verisign.com
72.13.36.66	A	dbmbp12.verisign.com
72.13.36.96	PTR	labs.idefense.com
72.13.36.105	A	rzu.verisign-grs.com
72.13.36.112	A	rzname.verisign-grs.com
72.13.38.2	PTR	r1.vcs-fo.brn1.verisign.com
72.13.38.20	A	www.speedbills.com
72.13.38.29	A	outcollectbilling.verisign.com
72.13.38.56	A	er.verisign.com
72.13.38.58	A	agents-train.metropcs.com
72.13.38.66	A	ebpp.metropcs.com
72.13.38.72	A	mobilecontrolservices-suncom.verisign.com
72.13.38.73	A	mobilecontrolservices-suncom-admin.verisign.com
72.13.39.1	PTR	rv.vcs3-fo.brn1.verisign.com
72.13.41.1	PTR	rv.vcs-uat-fo.brn1.verisign.com
72.13.41.40	A	uat-mms.verisign-grs.net
72.13.41.91	A	demo-portal.intelligentcdn.verisign.com
72.13.41.148	A+PTR	thebes.verisign.com
72.13.43.10	A	didondemand.verisign.com
72.13.43.11	A	voicesource.pacwest.com
72.13.43.23	A	lookup1.intelligentcdn.verisign.com
72.13.43.48	A	m-admin.contentportal.verisign.com
72.13.43.62	A	lookup7.intelligentcdn.verisign.com
72.13.43.87	A	dcms-reports.verisign-grs.net
72.13.44.21	A	epptool-ctld.verisign-grs.com
72.13.44.21	A	mct.verisign-grs.net
72.13.44.22	A	epp-ote.verisign-grs.com
72.13.44.22	A	trrp1.verisign-grs.com
72.13.44.32	A	nameeppote.verisign-grs.com
72.13.44.33	A	namewebote.verisign-grs.com
72.13.44.36	A	test.dnsassurance.com
72.13.44.37	A	ote-certificates.dnsassurance.com
72.13.44.69	A	mbv-ote-builder.verisign-grs.com
72.13.44.72	A	mbv-ote-ftp.verisign-grs.com
72.13.44.94	A	ote-namesuggestion.com
72.13.44.100	A+PTR	ote-hostdist-a.verisign-grs.com
72.13.44.113	A	mct.verisign-grs.com
72.13.45.22	A	gslb.shared-fo.brn1.verisign.com
72.13.46.34	PTR	p.au
72.13.47.0	PTR	bc.r1.mss-fo.brn1.verisign.com
72.13.47.2	PTR	vlan35.r1.mss-fo.brn1.verisign.com
72.13.47.3	PTR	vlan35.r2.mss-fo.brn1.verisign.com
72.13.47.33	PTR	u3.verisigndns.com
72.13.47.34	PTR	q.au
72.13.47.255	PTR	bc.ta1.shared-fo.brn1.verisign.com
72.13.57.86	A	qambvtest5.cc
72.13.57.88	A	qa-api.verisigndns.com
72.13.58.32	A+PTR	fo-vm07.verisignlabs.com
72.13.58.32	A	mxer.cc
72.13.58.32	A	ns.vrsnrpt-labs.cc
72.13.58.33	PTR	fo-vm26.verisignlabs.com
72.13.58.33	A	secspider.cs.ucla.edu
72.13.58.64	PTR	farnsworth.verisignlabs.com
72.13.58.64	A	validatorsearch.verisignlabs.com
72.13.58.64	A	verisignlabs.net
72.13.58.67	PTR	fo-vm23.verisignlabs.com
72.13.58.100	A+PTR	vfns1.verisignlabs.com
72.13.58.100	A	vfns1.packet-pushers.com
72.13.58.101	A	vfns2.packet-pushers.com
72.13.58.101	A	vfns2.verisignlabs.com
72.13.59.49	A	mxb1.nic.name
72.13.60.15	A	smtp-va-vss.verisign.net
72.13.60.96	PTR	ssl-certificate-center-es.verisign.net
72.13.60.245	A	ns100.nstld.net
72.13.60.245	A	whoisns1.nstld.net
72.13.60.245	A	ns16.nstld.net
72.13.62.3	PTR	sw1.ua-fo.brn1.verisign.com
72.13.62.22	A	nat-dnsbo1-ext.verisign.net
72.13.62.24	A	ns2vip.verisign.com
72.13.62.32	A	nat-validation-ua-brn.verisign.net
72.13.62.51	A+PTR	nat-adobeindiv-brn.verisign.net
72.13.62.69	A+PTR	vip-saml-brn.verisign.net
72.13.62.75	A	vipgoidservices-auth-brn.verisign.net
72.13.62.80	A	nat-vipgoid-brn.verisign.net
72.13.62.81	A	vipuserservices-auth-brn.verisign.net
72.13.62.101	A	vipservices-auth-east.verisign.net
72.13.63.25	A	blog.verisign.com
72.13.63.30	A+PTR	mail1.verisign.com
72.13.63.31	A+PTR	mail2.verisign.com
72.13.63.32	A+PTR	mail3.verisign.com
72.13.63.55	A	verisign.fr
72.13.63.55	A	verisign.com.lv
72.13.63.55	A	verisign.com.cn
72.13.63.66	A	webmail.verisign.com
72.13.63.68	A	dontbewithout.com
72.13.63.68	A	microname.vrsndns.com
72.13.63.68	A	www.piensaloengrande.com