Robtex

Up: 198.71.4.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 198.71.6.0/24
Down right: 198.71.7.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.71.6.1	A+PTR	ns1.nber.org
198.71.6.2	A	passwd.nber.org
198.71.6.3	A+PTR	ns3.nber.org
198.71.6.3	A	dhcp.nber.org
198.71.6.7	A+PTR	mail1dev.nber.org
198.71.6.11	A	windows-ns.nber.org
198.71.6.24	A+PTR	reboot.nber.org
198.71.6.35	A+PTR	nber16.nber.org
198.71.6.35	A	papers.nber.org
198.71.6.35	A	users.nber.org
198.71.6.41	A+PTR	nber7.nber.org
198.71.6.74	A+PTR	nber4.nber.org
198.71.6.79	A+PTR	mail2.nber.org
198.71.6.79	A	mail1.nber.org
198.71.6.79	A	mail.nber.org
198.71.6.87	A	ns1-ilo.nber.org
198.71.6.100	A	perlw2.nber.org
198.71.6.131	A+PTR	nber15.nber.org
198.71.6.131	A	uadata.org
198.71.6.131	A	nanoenvironment.org
198.71.6.152	A	socialcollateral.org
198.71.6.152	A	www.socialcollateral.org
198.71.6.173	A	taxsimftp.nber.org
198.71.6.178	A+PTR	nber9.nber.org
198.71.6.198	A	zwicke.nber.org
198.71.6.208	A+PTR	mobius7.nber.org
198.71.6.208	A	www.markusmobius.org
198.71.6.211	A+PTR	mobius10.nber.org
198.71.6.211	A	tanyarosenblat.org
198.71.6.220	A+PTR	mobius20.nber.org
198.71.6.220	A	kirklandstreet.org
198.71.7.61	A+PTR	boehnke-nas.nber.org
198.71.7.76	A+PTR	dhcp-7-76.nber.org
198.71.7.253	A+PTR	wireless-dmz.nber.org
198.71.7.254	A+PTR	nbergw.nber.org