Robtex

Up: 192.35.50.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 192.35.51.0/25
Down right: 192.35.51.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
192.35.51.1	A+PTR	gw.f.nstld.com
192.35.51.9	A+PTR	vrrp.f.nstld.com
192.35.51.10	A	igw1.f.nstld.com
192.35.51.11	A	igw2.f.nstld.com
192.35.51.30	A+PTR	f.gtld-servers.net
192.35.51.30	A	trinetwork.net
192.35.51.30	A	f.edu-servers.net
192.35.51.31	PTR	f2.nstld.com
192.35.51.31	A	f2.gov-servers.net
192.35.51.32	PTR	f3.nstld.com
192.35.51.32	A+PTR	dill.arin.net
192.35.51.33	PTR	f4.nstld.com
192.35.51.33	A	srv2-goldman-sachs.ma
192.35.51.33	A	srv2-wellbox.ma
192.35.51.34	PTR	ns6.dnsmanaged.com
192.35.51.35	A+PTR	f6.nstld.com
192.35.51.36	PTR	f.edu-servers.net
192.35.51.36	A	f7.nstld.com
192.35.51.37	PTR	f8.nstld.com
192.35.51.38	PTR	f9.nstld.com
192.35.51.39	PTR	f10.nstld.com