Robtex

Up: 199.43.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 199.43.0.0/25
Down right: 199.43.0.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.43.0.6	PTR	cr2.arin.net
199.43.0.11	PTR	bucket.arin.net
199.43.0.13	PTR	apnic.arin.net
199.43.0.14	A+PTR	lacnic.arin.net
199.43.0.15	PTR	ripe.arin.net
199.43.0.16	A+PTR	afrinic.arin.net
199.43.0.29	A+PTR	zork.arin.net
199.43.0.31	A	getipv6.info
199.43.0.34	PTR	host-199-43-0-34.arin.net
199.43.0.35	PTR	ns0.dmz.ash.arin.net
199.43.0.35	A	ns0.ash.arin.net
199.43.0.43	A	rwhois.net
199.43.0.43	A	www.arin.net
199.43.0.44	A+PTR	reg.arin.net
199.43.0.44	A	rwhois.net
199.43.0.44	A	www.arin.net
199.43.0.47	A+PTR	www.arin.net
199.43.0.47	A	rwhois.net
199.43.0.47	A	arin.net
199.43.0.53	A+PTR	smtp3.arin.net
199.43.0.54	A+PTR	smtp4.arin.net
199.43.0.65	A	analytics.arin.net
199.43.0.69	A	arin.net
199.43.0.83	A+PTR	reg.arin.net
199.43.0.84	A+PTR	reg.arin.net
199.43.0.131	PTR	host-199-43-0-131.arin.net
199.43.0.134	PTR	cr2.arin.net
199.43.0.141	A	ripe.arin.net
199.43.0.194	PTR	ftp.arin.net
199.43.0.196	PTR	ns1.arin.net
199.43.0.197	PTR	smtp3.arin.net
199.43.0.199	A	drpexchange.arin.net
199.43.0.200	PTR	host-199-43-0-200.arin.net
199.43.0.201	PTR	host-199-43-0-201.arin.net
199.43.0.201	A	vpn.ash.arin.net
199.43.0.209	PTR	rwhois.arin.net
199.43.0.220	A	vpn.ash.arin.net
199.43.0.234	PTR	zork.arin.net