Robtex

Up: 192.153.246.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.153.247.0/25
Down right: 192.153.247.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.153.247.0	PTR	rv.core-fo.lks2.verisign.com
192.153.247.1	PTR	rv.core-fo.lks2.verisign.com
192.153.247.4	A+PTR	snoopy.verisign-grs.net
192.153.247.17	PTR	ftp.verisign-grs.net
192.153.247.19	PTR	mct.verisign-grs.net
192.153.247.21	PTR	mx.verisign-grs.net
192.153.247.21	A	mailhost.crsnic.net
192.153.247.21	A	*.iamtoodumbtosetupdns.21.247.153.192.hitfarm.com
192.153.247.22	A+PTR	snsmonitor.verisign.com
192.153.247.24	PTR	www.gtldregistries.org
192.153.247.25	PTR	www.globalregistrationservices.com
192.153.247.25	A	www.enumworld.com
192.153.247.25	A	enumworld.com
192.153.247.26	A	www.noenglishnecessary.com
192.153.247.29	PTR	mywebnum.com
192.153.247.29	A	www.webnum.com
192.153.247.33	PTR	ns3.verisign-grs.net
192.153.247.34	PTR	ns4.verisign-grs.net
192.153.247.39	A+PTR	hostdist1.verisign-grs.net
192.153.247.40	A+PTR	nzone2.verisign-grs.net
192.153.247.41	A	www.acmebw.net
192.153.247.41	A	mail.acmebw.com
192.153.247.45	PTR	srsmonitor2.lks2.verisign-grs.net
192.153.247.46	A+PTR	acdist1.verisign-grs.net
192.153.247.54	PTR	idnrrp.verisign-grs.net
192.153.247.60	A	pacemaker.verisign-grs.net
192.153.247.61	A+PTR	hud-ops.verisign-grs.net
192.153.247.74	A+PTR	rs-test.verisign-grs.com
192.153.247.79	PTR	rzms.verisign-grs.com
192.153.247.100	A+PTR	www.crsnic.net
192.153.247.100	A	crsnic.net
192.153.247.100	A	nsiregistry.net
192.153.247.101	PTR	www.idnsdc.com
192.153.247.253	A	mpr.verisign-grs.net
192.153.247.255	PTR	arin-20140211-x199392.verisign.com